Suitability Evaluation Index System Research Articles

Multi-Scenario analysis of rooftop greening regulation on runoff effects based on adaptive Evaluation: A case study of Macau, China

The reduction in internal ecological spaces within urban environments and the expansion of impervious surfaces have been identified as factors significantly increasing the susceptibility of cities to flood disasters. Rooftop greening, an essential component of urban stormwater management strategies, offers a versatile solution for augmenting permeable surfaces and delivering ecological services while seamlessly integrating with existing urban infrastructure. This approach has been proven effective in enhancing urban resilience against rainfall-induced flooding events. Hence, the precise identification of suitable building rooftops for green infrastructure within urbanized regions, combined with the simulation of runoff regulation effects brought about by these rooftop greening interventions, holds substantial practical significance. This study innovatively constructs a technical method for measuring the runoff control performance of urban-scale green roofs from identification, evaluation to simulation. Taking the Macao Special Administrative Region as an example, a green roof suitability evaluation index system that is consistent with urban characteristics has been constructed, integrating machine learning, comprehensive evaluation, SWMM simulation methods to evaluate the suitability of roof greening in urban areas and simulate the impact of multi-senarios green roof construction types on runoff regulation. Finally, a comprehensive strategy for rooftop greening construction in Macau is proposed, with the aim of amplifying the runoff regulation capabilities of such initiatives. The main findings of the research include the following: (1) The research area exhibits a notably high aggregate potential for rooftop greening, with suitable rooftop areas comprising approximately 34% of the total rooftop expanse. Notably, construction vintage and roof elevation are identified as the most substantive constraints on rooftop greening. (2) Discernible differences in rooftop greening construction scale exert a significant influence on runoff regulation capacity, with the magnitude of greening positively correlated with its runoff regulation efficacy. Distinct greening typologies elicit varying impacts on runoff regulation, with semi-intensive rooftop greening surpassing extensive approaches in runoff regulation performance. Disparate distribution patterns of rooftop greening engender dissimilar runoff regulation effects, with rooftop greening layouts situated distant from drainage outlets facilitating runoff mitigation, while those in close proximity to drainage outlets enhance peak flow reduction effects.

Comprehensive Land Consolidation Zoning Based on Minimum Cumulative Resistance Model—A Case Study of Chongqing, Southwest China

Comprehensive land consolidation (CLC) has become an effective tool for promoting the coordinated development of production, living, and ecological spaces (PLES) in rural China. Given the remarkable territorial differentiation, planning strategies that are geared towards local conditions are indispensable for implementing CLC projects. This study employs the minimum cumulative resistance (MCR) model to simulate the horizontal competition among PLES in Chongqing. The suitability evaluation index system for PLES was developed using natural ecological data, socio-economic data, and land use data from Chongqing Municipality. The results show that: (1) Based on the principles of productivity, livability, and sustainability, the suitability of PLES in Chongqing is classified into highly suitable, moderately suitable, generally suitable, unsuitable, and extremely unsuitable areas. The spatial distribution of suitability across different levels in Chongqing exhibits certain degrees of overlap, intersection, and clustering. (2) Based on the different resistance relationships, 1031 townships in Chongqing were divided into seven types of CLC areas. The northeastern and southeastern regions of Chongqing Municipality exhibit distinct ecological and functional advantages, whereas the northern and western parts of the city are characterized by greater multifunctionality. (3) Tailored CLC measures are suggested for various suitability scenarios, aligning with local conditions and planned developments. The MCR model and PLES theory integrated zoning methods for CLC are practicable and effective, providing a scientific foundation for the construction of land consolidation plans in Chongqing and important references for regional sustainable development.

Research on the Construction of Evaluation Index System for Satisfaction of College Students with University Services

With the popularization of higher education in China, the quality of higher education is increasingly receiving widespread attention from students, parents, and society. As the main body of universities, college students are the most direct recipients of higher education services, the group most concerned about the quality of higher education, and the most trustworthy evaluators and evaluators of the quality of higher education. The theory of customer satisfaction is the foundation of higher education evaluation. It is of great theoretical value and practical significance to compare and study the theory of customer satisfaction at home and abroad with the evaluation index system of college student satisfaction, and to construct a suitable and realistic evaluation model and index system for college student satisfaction in China. Building a "student centered" evaluation index system for college students' satisfaction with university services based on customer satisfaction theory can provide new methods for higher education evaluation, improve the higher education evaluation system, and promote innovation in the higher education monitoring system.

Variable-Weight Suitability Evaluation of Underground Space Development Considering Socioeconomic Factors

The suitability evaluation of urban underground space (UUS) development can aid in making the planning, construction, and operation management of underground spaces more scientific, orderly and systematic. Taking the starting area of Changjiang New Town as an example, this study considered socioeconomic factors as a crucial cost indicator in the suitability evaluation index system of underground space development, and 15 evaluation factors affecting underground space utilization were selected in combination with geological environment conditions. The subjective weights of each evaluation factor were calculated using the analytic hierarchy process (AHP), and variable-weight theory was introduced to calculate the comprehensive variable weights. The comprehensive variable weights were modified, taking socioeconomic factors into consideration, so as to quantitatively evaluate the development suitability of underground space in the research area. A comparison between the evaluation results of the constant-weight and variable-weight methods showed that the latter can correct the efficaciously determined subjective weight using the AHP and make the evaluation result more scientific and reasonable. A comprehensive consideration of the impact of socioeconomic factors on development costs and benefits made the evaluation results more instructive. The evaluation results showed that the area with the best suitability for underground space development in the study area accounted for approximately 18.6%, and the second-best suitable area accounts for approximately 60.8%. Hence, the development prospect of the study area is good.

Multi-Source Data-Based Evaluation of Suitability of Land for Elderly Care and Layout Optimization: A Case Study of Changsha, China

This paper constructs an evaluation index system for the suitability of community home and institutional elderly care land development, respectively, from different elderly care modes with the data of urban POI, OSM road network, and expert questionnaires in Changsha urban area in 2021, in order to alleviate the pressure of insufficient land for elderly care brought on by the increasingly serious aging problem. The suitability evaluation index system is based on the intersection of Thiessen polygons with the current elderly care facilities as the center point as the supplementary land for the elderly and explores the optimization path of the land for the elderly in combination with the existing residential land in Changsha. The results show the following: ① The spatial variation of land suitability for both community home and institutional elderly facilities is significant, exhibiting a pattern of “high in the middle and low in the surroundings, with high-value areas clustered in the center of the city, decreasing in suitability toward the periphery, and occasional scattered clusters in the suburbs.” Among them, Furong District has the highest proportion of suitable areas for the elderly; ② Utilizing Changsha’s Tianxin and Yuhua districts as case studies, the optimal path of land use for the elderly are investigated to provide a foundation for land use planning for the elderly in Changsha.

Evaluating the impact of power station regulation on the suitability of drifting spawning fish habitat based on the fuzzy evaluation method

Ecological regulation is an important means of reservoir adaptive management, but its effective evaluation faces two major difficulties: the response mechanism of fish spawning behavior is not completely clear, and how to establish a feedback regulation relationship of hydrological processes to improve the river environment is unknown. Based on a long-term series of early fish resources, hydrology, water temperature, and meteorology data, this research clarifies the fish spawning habitat requirements in the power station regulation environment, determines a habitat suitability evaluation index system and evaluation criteria, reveals the temporal and spatial variation characteristics of fish habitat suitability under power station regulation based on the fuzzy logic method, provides feedback to the existing regulation scheme, and proposes suggestions for sustainable adaptive management of the reservoir. The temporal and spatial variation characteristics of the spawning river sections habitat suitability are the comprehensive differences among multiple objectives and factors. The habitat suitability of each river section decreases after impoundment, especially in May, which is related to the delayed of water temperature changes under reservoir regulation. The reduced suitability of the Yibin(YB) river section is most affected by the impoundment regulation of the Xiluodu Reservoir (XLDR) and Xiangjiaba Reservoir (XJBR), while the Luzhou(LZ) river section is affected by the inflow of the Minjiang River (MJ) tributary, which reduces the suitability difference before and after impoundment. The Jiangjin(JJ) river section is less affected by the regulation of the XJBR and is greatly affected by tributaries and rainfall. How to adjust the regulation strategies under the new boundaries and new situations in the future, which are affected by the cumulative impact of the sustainable development of upstream cascades, is the focus of reservoir adaptive management. This research can provide technical support for the management of cascade reservoirs under future scenarios.

Regional suitability analysis of the rural biogas power generation industry:A case of China

Biogas power generation has environmental and social benefits; however, its industrialization is lacking in China. Regional suitability for the biogas power generation industry must be assessed to optimize its layout. First, a regional suitability evaluation index system for said industry was constructed, including resource, societal, and economic conditions, and environmental pressures. Next, a multilevel fuzzy comprehensive evaluation method for regional suitability was proposed; 31 provinces (cities) in China were divided into five grades. Finally, according to the matching degree of suitability and development levels, the 31 regions were divided into three categories, while corresponding policy recommendations were proposed. The rank distribution among regions was found to be unbalanced; there were significant differences in the grade evaluation results of each region under the four criteria layers. The eastern region was significantly superior to the western region. Henan and Hebei were the most suitable regions for development, whereas Ningxia, Hainan, Qinghai, and Tibet were not. Moreover, the suitability of the biogas power generation industry in most regions matched the development level, although not in Sichuan or Jiangsu. These results provide a basis for the government to formulate rural biogas power generation policies and promote sustainable development of the industry.

Suitability Evaluation of Hydrogen Production and Hydrogenation Station Based on AHP-Fuzzy Comprehensive Evaluation Method

Since there are multiple influencing factors and lack of evaluation standards for the construction of hydrogen production and hydrogenation station in China, this paper establishes the suitability evaluation index system of hydrogen production and hydrogenation station from four aspects of technology, economy, environment and safety. Combined with actual conditions, this paper uses Analytic Hierarch Process (AHP) and Fuzzy Comprehensive evaluation to evaluate water electrolysis hydrogen and hydrogenation production station and natural gas reformation hydrogen production and hydrogenation station. The results show that hydrogen producing by water electrolysis is more efficient than natural gas reformation in hydrogen production and hydrogenation station, and it should be choose firstly. Furthermore, natural gas reformation hydrogen producing is inferior in technology, environment and safety, but it is superior to water electrolysis hydrogen producing in economy. In the future, we can strengthen development of the hydrogen production from renewable energy sources, so as to enhance the economic benefit of that by water electrolysis. In addition, we can also adopt two ways of hydrogen production in hydrogen production and hydrogenation station to achieve favorable integrative benefits.

Decision-Making on Reuse Modes of Abandoned Coal Mine Industrial Sites in Beijing Based on Environment-Economy-Society Matter-Element Models

Redevelopment of abandoned coal mine industrial sites (ACMISs) has been one of the critical research topics in recent years. The ecological system of ACMISs, which involves environmental, economic, and social characteristics, is an environment-economy-society (EES) composite system. Many factors with conflicting effects are involved in the sustainable development of this system. The matter-element analysis method presented in this paper can transform counteracting problems among influencing factors into compatible problems. This analytical approach leads to a reduction of the uncertainty of these influencing factors and provides a suitable research method to solve the complexity when selecting the most suitable reuse mode of the ACMIS. In this study, eight state-owned ACMISs in the suburbs of Beijing were investigated, and a suitability evaluation index system based on the EES conceptual framework was built. Targeting four reuse modes, including the residential area, the park, the scientific research and office campus, and the business district, we established a matter-element decision-making model to evaluate the priority of reuse mode selections scientifically. The results of our calculations show that the optimal reuse mode for the Qianjuntai, Muchengjian, and Huapogen ACMISs is the park; for the Da’anshan and Changgouyu ACMISs is the business district; for the Datai ACMIS is the scientific research and office campus; and for the Wangping ACMIS is the residential area. Since the suitability level of reusing the Anjiatan ACMIS in any of the four reuse modes is relatively low, it is recommended to reserve it for governmental strategically reserved open space. These real cases demonstrate that the research method is feasible and can be applied to reuse mode decisions for similar abandoned coal mines.

Study on urban construction land optimization based on geological environment suitability evaluation

In order to realize the optimal allocation of urban construction and geological environment resources, in this paper, the suitability evaluation index system is established, the comprehensive index method is used to evaluate, and the various evaluation factors are superimposed and analyzed. The results show that the area with good suitability accounts for 44.34%. The area with good suitability accounts for 33.86%. The area with medium suitability accounts for 19.27%, and the area with poor suitability accounts for about 2.49%. In this paper, the comprehensive environmental index method is used to evaluate the geological environment factors affecting the urban construction of Xi’an. The Xi’an urban construction geological environment suitability zoning is obtained.

Evaluation of rural ecotourism resources based on the AHP Method in Shanghai

In order to develop rural eco-tourism better, it is very important to establish a suitable evaluation index system of tourism resources. This study constructs an evaluation indicator system of rural ecotourism resources in Shanghai from three aspects: Resource values, ecological environment and development conditions, which includes 18 indexes. Using AHP to determine the weight, in the comprehensive level of evaluation, Resource values (B1)> Ecological environment(B2) > Development conditions(B3). Among the most important indicators are: Recreational value (C1), Pollution control capability (C8), Farming experience value (C7), Environmental hygiene (C9), Convenience of transportation (C14), Ecological value (C4) and Life experience value (C6). By using this evaluation model to grade the rural ecotourism resources in Shanghai through questionnaire survey, the result is that the rural ecotourism resources in Shanghai are quite good. With the development of the construction of the Beautiful Country, the value of rural eco-tourism resources in Shanghai has been continuously explored and the eco-environmental quality is assessed higher, which provides an important guarantee for the development of rural eco-tourism in Shanghai. In addition, cultural values and health value need to be tapped in depth, and efforts should be made to increase the publicity and communication among local residents in rural tourist destinations. While optimizing the construction of tourism facilities, we must constantly improve the level of service management, so as to improve the service quality of rural ecotourism.

RETRACTED: Recognition and zoning optimization of geographical spatial conflict in Wuhan metropolitan area based on multi-functional perspective

Identifying geographical spatial conflicts and optimizing development patterns are important prerequisites for eliminating the conflicts of geographical spatial conflict. The paper takes the Wuhan Metropolitan Area as an example. Using grid-scale data, we construct a multi-functional suitability evaluation index system for geographical space, starting from three dimensions: ecological protection, agricultural production and urban construction. The multi-index comprehensive evaluation method is used to measure the geographical spatial suitability level and identify the characteristics of geographical spatial conflict patterns. Three-dimensional Rubik's cube model is used to divide the space conflict types and optimize the partition. We found that the areas with suitable ecological protection functions and more suitable areas are mainly distributed near the waters and the Dabie Mountains and Mufu Mountains with relatively high altitude in Wuhan Metropolitan Area. Suitable areas for agricultural production functions are concentrated in the Jianghan Plain. Suitable areas for urban construction functions are concentrated around urban areas, established towns, and major transportation routes. Regions with high intensity of land and space conflicts are mainly located in the central and northwestern parts of the Wuhan Metropolitan Area. Regions with low levels of conflict are concentrated in the west, northeast, and southeast regions of the Wuhan Metropolitan Area. The degree of geographical spatial conflict in Wuhan Metropolitan Area can be divided into three primary zones and 12 secondary zones, which are intense conflict zone, general conflict zone, and weak conflict zone. Based on multi-functional perspective, identifying and analyzing the types of geographical spatial conflict will help locate the development direction of different conflict areas and provide theoretical and technical support for the optimization of geographical space.

Can marine park become an ecotourism destination? Evidence from stakeholders' perceptions of the suitability

Scientific evaluation of the suitability of ecotourism is of great significance to the ecological protection and future development of marine parks. This study uses multi-criteria evaluation method to build the ecotourism suitability evaluation index system and evaluation model, and takes Dongshan Island in China as an example for empirical analysis. Through conceptualizing and quantifying the relationship between stakeholder perception and the suitability of marine park ecotourism development, this paper analyzes the heterogeneity of different groups, including the differences between local people and tourists, different occupational groups and groups with different educational levels, thus clarifying the problems existing in the development of marine park ecotourism, and providing reference for the further development and management of the marine park. The results show that Dongshan Island has a good carrying capacity and a certain level of tourism development foundation, which can provide opportunities for mass tourists to participate in ecotourism. However, weak environmental awareness of Dongshan Island residents will become an important obstacle to the island's ecotourism development. In terms of future development, the demand for environmental education in Dongshan Island is obvious. The development of ecotourism requires complete tourism management measures and tourist education and effective environmental management.

Intelligent urban ecological suitability system based on pattern recognition

Today, with the rapid development of urbanization, the ecological and environmental problems of the city have become increasingly serious and have become the focus of the world. The most important issue facing the majority of ecological workers is how to apply the theory of ecology to solve today’s problems. The various environmental problems faced in urban life and the sustainable development of the city’s ecological civilization. How ecological planning is used to coordinate the relationship between people and the natural environment and natural resources is increasingly gaining attention and expanding the range and scope of its applications. However, as an ecological suitability analysis based on ecological planning, many analytical methods and systems are still being explored and developed due to the geographical complexity and factor diversity involved. In recent years, with the rapid development of computer hardware and software technology, pattern recognition has received more and more attention, pattern recognition and image processing technology has become more and more perfect, and has been successfully applied in more and more fields. This thesis begins to focus on the urban ecological suitability content based on pattern recognition technology and image processing. The main contents of this thesis include: introducing the background of urban ecological suitability and the status quo of ecological suitability analysis and existing research methods. According to the structure of the urban ecosystem and the national standards for the construction of ecological systems and ecological cities, an indicator system for ecological suitability evaluation is established. A pattern recognition system and common pattern recognition and image processing methods are introduced. Based on some common evaluation methods and models, the pattern recognition technology theory and image processing technology are introduced into the urban ecological suitability analysis. Based on the image system theory and vector projection principle, the ecological suitability analysis is established. Associated projection model. The model considers the evaluation sample and the quality standards at each level as vectors, and respectively projects the same vector ideal. Based on establishing the ecological suitability evaluation index system and standards, the ecological suitability was evaluated by using the model.

Sustainable use zoning of land resources considering ecological and geological problems in Pearl River Delta Economic Zone, China

The Pearl River Delta Economic Zone is one of the fastest growing areas of China’s social and economic development. However, the contradiction between people and land, the deterioration of ecological environment and the damage of urban ecological security have become more serious problems. In previous studies there was single land utilization type in small-area and the evaluation method was not suitable to large areas, this study proposes a new method. Firstly, the study implements ecological land zoning from assessing the importance of ecosystem services functional in four aspects: biodiversity, water conservation, soil conservation and coastal protected zone. Then, the suitability evaluation index system of agricultural and construction land is established from the geological environment perspective, and introduces variable weight-analytical hierarchy process-comprehensive index model to evaluate the suitability of agricultural land and construction land. Re-zoning the type of land that has a special effect on the socio-economic, the mining land, protected area of geological relics and groundwater resources, respectively. Finally, considering the actual condition use status and suitability distribution of land, the results of comprehensive zoning of land utilization is got. The results of this study can provide some geological basis for the future land utilization zoning.

Spatiotemporal variation analysis of regional flood disaster resilience capability using an improved projection pursuit model based on the wind-driven optimization algorithm

Abstract Due to the weak methods available for evaluation of the resilience of regional flood disaster systems and the lack of research on the driving mechanism of resilience, by exploring the principles of regional flood disaster resilience and constructing a suitable evaluation index system, the wind driven optimization (WDO) algorithm was introduced, and an improved projection pursuit (PP) evaluation model of flood disaster resilience was proposed. Twelve farms under the Heilongjiang Agricultural Reclamation Hongxinglong Administration Bureau were included in the research area. A total of 43 primary indicators were selected from four criteria to describe the natural environment, culture, society, economic development and flood control technologies. The R clustering factor analysis method was used to determine 15 optimal indexes. The improved PP model based on the WDO algorithm (WDO-PP) was used to evaluate the flood disaster resilience of 12 farms. The results showed that the number of farms with a level IV rating on flood resilience decreased from 25% to 8.3% from 2002 to 2009. In 2009–2016, with the exception of the Bawuer and Shuguang farms, the flood disaster resilience index decreased, and that of the remaining farms increased. In 2002–2016, the Wujiuqi, Shuangyashan, Shuguang and Hongqiling farms in the central region of the Hongxinglong Administration Bureau were less resilient to disasters, and the farms that responded better to flood disasters were mainly located in the eastern or western Hongxinglong Administration Bureau near a river. Further analysis shows that the forest coverage rate, paddy field coverage ratio, shelter forest area ratio, proportion of primary industry, agricultural water use efficiency, and irrigation and drainage capacity were the key drivers of the flood disaster resilience in the Hongxinglong Management Bureau. Based on the Rastrigin and Schaffer functions, the results show that the success rate of the WDO algorithm is 100% over 10 iterations of the optimization calculation of the test function, while the success rate of the other two algorithms is relatively inadequate; however, in terms of value and standard deviation, both are better than adaptive particle swarm optimization (APSO) and adaptive genetic algorithm (AGA) algorithms. Moreover, in the convergence curve, the WDO algorithm converges fast, the number of iterations can achieve the optimal effect on average 3–5 times, and the AGA and APSO algorithms need more than 40 iterations to achieve the best-seeking effect. Taking the index of agricultural water use efficiency in Bawuer farm as an example, the index weight is greater than 60% and the utilization rate of agricultural water is more than 98%, which is closer to reality. Therefore, the evaluation results of the flood disaster resilience evaluation model proposed in this study are more accurate: WDO-PP>(adaptive genetic algorithm) AGA-PP>(adaptive particle swarm optimization algorithm)APSO-PP. In conclusion, the WDO-PP model has certain reference value for flood disaster recovery, monitoring and early warning.

Suitability of human settlement environment in Buyei traditional villages in rocky desertification area of Guizhou, China.

To investigate the traditional village living environment adaptability to desertification and topography, the suitability evaluation index system and weight of traditional Buyei traditional villages in the rocky desertification area human settlement were quantified using Delphi method and comprehensive weighting method. We calculated human settlements environment suitability value and threshold to comprehensively analyze the human settlements environment suitability. The results showed that 10% of the traditional Buyei traditional villages were located in the rocky desertification areas with high intensity and extremely high intensity and had the tradition of selecting the best environment. The index system of residential environment suitability was composed of five first-level indices (economy, historic culture, ecology, society, and building environment suitability) and 26 second-level indices. This index system was applicable to villages in karst regions. The comprehensive environmental suitability value (2.81-3.77), the economy value (0.77-1.17), the historic culture value (0.39-0.50), the ecology value (0.83-1.07), the social environment value (0.38-0.53) all decreased with the increasing intensity of rocky desertification, but the suitability value of building environment did not change, which ranged from 0.43 to 0.51. Rocky desertification had profound and synergistic impacts on economy, historic culture, ecology and social environment. The floor level of the human settlement suitability threshold was 2.93. If the threshold was lower than 2.93, it could be considered to move or take measures to improve its value. The suitability value (3.56) of traditional village living environment in mountain slope was higher than that in depression (3.42) and valley (3.16). The human settlement suitability of traditional villages in rocky desertification area was higher than that of ordinary villages, but was lower than that of normal landform, with the differences in economy and ecology being the main reasons. To improve the living environment of traditional villages in rocky desertification areas, we should strengthen the comprehensive control of rocky desertification and policy support, develop ecological economy and tourism, protect historic culture or choose ecological migration. This research could provide theoretical base for the planning and construction of village living environment protection in karst areas.

Comprehensive evaluation for active distribution network

Recently, the integration of DG (distributed generation) with high penetration and new loads lead to the transformation to active distribution network. Thus, it is necessary to propose a more suitable comprehensive evaluation index system to achieve the scientific evaluation of operation state and the development of active distribution network. This paper presents a new comprehensive evaluation index system for the active distribution network considering the influence of DG and new load. The combined weighting method based on the variable weight theory and the multi-layer fuzzy comprehensive evaluation method based on the improved trapezoidal cloud model is proposed to solve the model. Finally, case study is carried out to verify the validity of the proposed method and provide the reference value for the future development of distribution network.

Identification of resilience characteristics of a regional agricultural water resources system based on index optimization and improved support vector machine

Abstract In order to solve the gap and accuracy in the analytical methods of the resilience of a regional agricultural water resources system, a suitable evaluation index system based on the optimal index model was introduced and applied to the 15 farms in the Jiansanjiang Administration of Heilongjiang Province of China. An improved support vector machine (SVM) was used to analyze the resilience level of each farm for the selected time period. The test results showed that the indicator optimization model had the advantage of eliminating redundant indicators and ensuring the maximum content of screening indicators. The indicator system reflected all original information by 34% of initial indicators. The results showed that the particle swarm optimization-support vector machine (PSO-SVM) model had higher accuracy for the evaluation of agricultural water resource resilience through the analysis of stability and reliability of each model. The spatial pattern of resilience over selected farms was generally characterized by ‘low in the southwest and high in the northeast’. The research achievements may provide technical and theoretical support for solving problems of index optimization and analysis methods of system resilience, and have an important theoretical and practical significance for promoting the sustainable development of regional agricultural water resources systems.

Evaluation on deep-water cage culture suitability of Changhai County based on GIS

For the scientific planning of deep-water cage culture sea, this paper constructs a comprehensive suitability evaluation index system for deep-water cage culture, uses AHP to determine index weights, and calculates the Comprehensive weighted suitability index. Based on GIS the spatial statistics and analysis of the suitability results were carried out, and the Changhai sea area was taken as an example for case study. The results show that the suitable sea area for deep-water cage culture is 7045.81 km2, accounting for 65.31% of the total sea area of Changhai county. The most suitable sea area for deep-water cage culture is distributed around Guanglu and Gexian Island, the southern part of Zhangzi Island, the sea area between the Shicheng Island and Wumang Island and the southern part of the Haiyang island, with an area of 1248.38 km2, accounting for 11.57%. The higher suitability sea area is widely distributed around Zhangzi Island, Haiyang Island, Wumang Island and Xiaochangshan Island, covering an area of 2279.56km2, accounting for 21.13%. Due to the combined effects of chlorophyll concentration and distance from town areas, it is not suitable for deep-water cage culture area mainly distributed in sea areas far away from land and islands, with an area of 814.81 km2, accounting for 7.56%. The study can provide reference for the sea planning and sea area management of aquaculture in Changhai county.