Deterioration Of Water Environment Research Articles

Response of River Ecosystem Health Status to Water Environmental Factors in the Middle Reaches of Yarlung Zangbo River

River ecological health assessments are the premise for protecting river biodiversity and curbing river water environment deterioration. To explore the river ecosystem health status and its response mechanism to water environmental factors in the middle reaches of the Yarlung Zangbo River, phytoplankton samples were collected during July and October 2021, and water environmental factors were measured. The phytoplankton species were identified, and their cell abundance and biomass were calculated. The phytoplankton integrity index was constructed to evaluate the ecological health status of the river. The temporal and spatial distribution characteristics of water environmental factors and phytoplankton community, as well as the correlation between P-IBI value and community parameters and water environmental factors were analyzed. The results showed that the difference in water environmental factors was not evident in time but was significant in space. The average cell abundance and biomass of phytoplankton were in the order of wet season>dry season and main stream>tributaries. Diatoms dominated the community, and pH and WT were the major water environmental factors driving the spatial and temporal distributions of phytoplankton. The ecological health status of the middle reaches of the Yarlung Zangbo River was "healthy to sub-healthy." The river health status was better than that of the dry season, and that of the tributaries was better than that of the main stream. EC, TUR, WT, NO3--N, and NH4+-N were the major water environmental factors affecting the ecological health status of the river reach, which could be affected by the direction and rate of phytoplankton community succession. It is involved in and affects the process of material circulation and energy flow of the river ecosystem, thereby driving the ecological health of the middle reaches of the Yarlung Zangbo River.

Regional water resources security assessment and optimization path analysis in karst areas based on emergy ecological footprint

With the continuous growth of the world's social economy and population, problems such as water shortage and water environment deterioration need to be solved urgently. Combining the emergy carrying capacity of water resources and the emergy ecological footprint method, the water security and sustainable development status of the typical city in the karst region (Anshun City) was evaluated, and the internal driving factors and optimization suggestions were discussed. The research results of water security in Anshun City show that: The water resources carrying capacity fluctuates greatly with rainfall and is generally in a low-level surplus state. The ecological pressure index and the sustainable utilization index show a downward trend. The pressure intensity of social and economic systems on water resources is increasing, and the sustainable development of water resources is not optimistic. Water resources security is mainly affected by natural ecological mechanisms centered on mountain systems, geological structures and hydrological systems, as well as social mechanisms centered on changes in population scale, land development and utilization, and urban development. In the future, the sustainable development of water resources can be promoted by changing the mode of economic development, optimizing the allocation of water resources, and protecting the ecological environment.

A Regional Water Resource Allocation Model Based on the Human–Water Harmony Theory in the Yellow River Basin

Considering the issues of water scarcity, water environment deterioration, and unreasonable allocation of water resources in the urban area of the Yellow River Basin, this paper introduces the human–water harmony theory to the allocation of regional water resources. Based on an analysis of the structural characteristics of the regional water resource system, the harmonious water resource allocation (HWRA) model—which includes three sub-systems (i.e., the water service system, ecological environmental system, and economic and social system)—is established. In addition, considering the uncertain factors in the HWRA model, the inexact fuzzy multi-objective programming (IFMOP) method is used to solve the model, aiming at achieving the minimum amount of regional water scarcity, the minimum amount of sewage discharge, and the maximum total economic benefit. A case study of water resource allocation of Binzhou, a city located in the Yellow River Basin, is conducted to validate the model. The model solution results show that the water resource system in Binzhou in 2025 and 2035 could be optimized after harmonious allocation, especially in terms of the water service and ecological environmental systems. Compared with the optimal water resource allocation (OWRA) model, the HWRA model has a more scientific water supply structure, and a smaller amount of sewage discharge. The HWRA model solves the variables using an interval number, so it can flexibly and scientifically reflect the decision-making process.

Sustainable nitrogen management strategies based on nitrogen flow in urban human system.

Urban nitrogen discharge has become an important factor leading to urban water environment deterioration, water crisis, and frequent air pollution. Human consumption is the driving force of nitrogen flow and the core of urban nitrogen research. Based on the process of nitrogen flow in the urban human system, combined with the relevant United Nations Sustainable Development Goals (SDGs) and taking Dar es Salaam as an example, we established a generic analytical framework for sustainable nitrogen management and put forward the strategies of sustainable nitrogen management in the urban human system. The main conclusions are as follows. (1) Waste nitrogen discharge affected the environment quality. 5286 t of N (5095 t of N-NH3, 86 t of N-N2O, and 105 t of N-NOx) was emitted into the atmosphere that affected air quality. 9304 t of N was discharged into surface water and 203 t of N was leaked, which had a negative impact on the prevention and control of surface water pollution. And 8334 t of N pose a potential threat to environmental quality. (2) Nitrogen management in Dar es Salaam faced huge challenges. From the perspective of nitrogen flow of the urban human system, the diet structure and household energy structure need to be optimized, and food waste is serious. Sewage treatment and garbage treatment are seriously insufficient, and the corresponding technologies are backward. In order to solve the existing problems of nitrogen flow in the urban human system and include sustainable nitrogen management under future challenges of growing population and economy, we proposed strategies including healthy diet guidance, reducing food waste, detailed assessment of household nitrogen accumulation, transformation of household energy structure to low nitrogen emission energy, increasing nitrogen recycling ratio, and infrastructure improvement of sewage treatment and garbage treatment, hence contributing to the achievement of related SDGs.

Study on the Sustainable use of Regional Groundwater Resources

Water resources have become a major factor limiting the sustainable development of China’s economy and society, and at the same time China’s water resources are developed and utilized in a relatively sloppy manner, China is facing multiple pressures of population, resources and environment, and the problems of water shortage, water environment deterioration and flood disaster prevention are becoming increasingly prominent. The rapid development of economic and social demand for water resources is increasing, and the people’s desire to improve the ecology and environment is becoming more and more urgent. How to fully consider the sustainable use of water resources, effectively solve the contradiction between water demand and supply, development and protection, improve the level of planning and scientific decision-making, promote economic development and water carrying capacity to adapt to accelerate the transformation of economic growth and structural adjustment is of great importance.

A Location Selection Method for Wastewater Treatment Plants Integrating Dynamic Change of Water Ecosystem and Socio-Cultural Indicators: A Case Study of Phnom Penh

The selection of reasonable locations for urban wastewater treatment plants (WWTPs) is significant in controlling water pollution. However, most current WWTP location selection models focus only on population density, industrial zone scale and geographic elements, while ignoring water pollution and local socio-cultural indicators. We propose a novel indicator system from RS/GIS data to select reasonable locations for WWTPs in Phnom Penh to avoid water environmental deterioration and harm to human health. The frequency of occurrence of water eutrophication is derived from time series RS data and reveals the degree of pollution of local water ecosystems, and is included as a demand indicator for the first time. In order to respect local socio-cultural customs, buffer zones for religious sites are included in the indicator system for the first time to fully determine the zones where construction of WWTPs is forbidden. Subsequently, WWTP locations are selected with the fusion of the minimized facilities number and maximum coverage models. The results demonstrate that the selected locations are all highly suitable and outside zones where construction is forbidden. The method proposed in the article provides a more comprehensive and scientific perspective for WWTP location selection.

High-performing PVDF membranes modified by Na+ MMT/ionic liquids (ILs) with different chain lengths: dye adsorption and separation from O/W emulsion

At present, the continuous deterioration of water environment is a serious threat to the sustainable society. Therefore, there is an urgent need for an antifouling film which can remove both dyes and oil/water. Herein, a series of ionic liquids (ILs) with different chain length was prepared to modified Na-montmorillonite (Na+ MMT) and mixed with polyvinylidene fluoride (PVDF) by blending technology. The obtained ILs–Na+ MMT film exhibited excellent hydrophilic performance and separation performance in the separation of dye and emulsion wastewater by phase transformation method. Specifically, we inspected ILs–Na+ MMT film with different chain lengths (C4, C8, C12, C16). Interestingly, the ionic liquid chain length(C12) of modified film showed good antifouling performance, the flux recovery rate for anionic (99.67%) and cationic dyes (98.72%) and bovine serum albumin (BSA) (98.1 %) at a high level as well as high rejection efficiency for oil–water emulsions, the modified films have excellent sustainability after 6 cycles of use (over 89%). In addition, dye flux was increased by 671% compared with pure PVDF membranes, and the waste rate reached 99.99% by dye filtration, indicating that PVDF/ILs-Na+ MMT has potential applications in oily and aqueous dye adsorption fields.

Microflora Influence: The Aquatic Environment Changes Grouping Risk and Development Speed of Toad Tadpoles

In addition to habitat loss and fragmentation, behavioral traits and the deterioration of water environments also contribute to the local extinction of amphibians. Abundant microflora in urban ponds may cause fatal diseases, whereas symbiotic bacteria may protect the host from pathogens; these effects may vary with group size. In this study, I monitored the growth of Japanese common toad (Bufo japonicus) larvae in Tokyo using three different group sizes: 1 (solitary), 2 (pair), and 15. Although there was no genetic bias in the major histocompatibility complex (MHC) class II genes or microsatellite loci to the survival of the larvae, the mortality risk of the larvae reared in pond water was higher than that of those reared in tap water. According to the survival analysis, the risk was more significant when the group size was 15. This result would be unwelcomed for the B. japonicus tadpoles, which have habits of social aggregation. Furthermore, larval metamorphosis took longer to complete in pond than tap water without any difference in body length or mass. These findings provide fundamental insight into the impact of the aquatic environment and the effect of the group size on animal health and conservation.

Water Allocation Optimization and Environmental Planning with Simulated Annealing Algorithms

Because of the continuous deterioration of water environment, it is ensured that the basic water demand of ecological environment is the key task of water resources utilization and control in China. In view of the uneven distribution of domestic water resources “more in the South and less in the north, more in the East and less in the west,” it is very necessary to optimize the allocation of water resources. This paper aims to optimize the allocation of water resources through simulated annealing algorithm (SAA), hoping to optimize the allocation of water resources through diversion, water intake, and storage measures such as pipelines. Based on this, this paper proposes an improved SAA pipeline construction algorithm. Aiming at the distribution of water sources in the Yangtze River Basin, the algorithm is used to optimize the objective function path to solve the unbalanced problem of rich and lack of regional water resources. And after optimizing the annealing simulation algorithm, the simulation optimization ability is significantly improved. Experiments show that the improved SAA can improve the optimal configuration by more than 50% and up to 96%, indicating that the improved algorithm has a more stable optimization planning function for the optimization of objectives and can often get a more perfect route.

Sustainable Development Evaluation and Its Obstacle Factors of the Weihe River Basin in Shaanxi Province, China

The contradiction between economic growth, social development, and water environment deterioration represent significant challenges for river basin sustainable development. By constructing an indicator system of river basin sustainable development, the entropy method is adopted to conduct a quantitative evaluation of the cities sustainable development level for the Weihe River Basin in Shaanxi Province from 2009 to 2018, and the standard deviational ellipse is used to analyze the evolution of spatial distribution pattern of sustainable development in the study area. Furthermore, the obstacle degree model is applied to analyze the main obstacle factors restricting the improvement of river basin sustainable development. The results show that the sustainable development level of the Weihe River basin in Shaanxi Province improved slowly during the study period and significant regional differences among cities. This study provides a novel approach for future evaluation on sustainable development of the Weihe River basin and even the arid region in Northwest China, to achieve a win-win situation between economic and social development and ecological environment protection.

Ecological Network Analysis for Water Pollution Metabolism in Urban Water Use System: Case Study of Fuzhou, China

Water environment deterioration in urban environments is a critical concern in sustainable water management processes, and the method of urban water metabolism has not been developed more fully in this field. Therefore, there is a requirement to evaluate urban water metabolism with a focus on water quality for sustainable water use. In this study, information and network environ analyses in ecological network analysis (ENA) were explored to measure the water pollutant metabolism state. Six sub-basins in the old part of Fuzhou in China using data from 2016 and 2019 were selected for the case study. Results showed that (1) water pollutant metabolism amount decreased and the metabolism efficiency was improved; (2) the contribution of sub-basins III and IV for pollutant metabolism were more important than the other sub-basins; (3) the river in sub-basin III was the maximum recipient control as a sink node; and (4) ecological relations between compartments were improved for pollutant metabolism. Based on the results, we proposed five types of ENA indicators including TST, a, wj, matrix CX, matrix sgnU, and C for the water pollutant metabolism assessment. The method developed here provided new insights to understand the production, transport, degradation, and discharge of pollutants in water use activities in urban environments, and we hope it can be helpful to improve the extension and application of the water metabolism approach in managing urban water quantity and quality in future.

Dynamic simulation for comprehensive water resources policies to improve water-use efficiency in coastal city

Coastal cities play an important role in regional economic development and sustainable development strategies of water resources and their ecological environment. As a typical coastal city in Hebei Province, Qinhuangdao city is facing severe problems, such as water shortages and water environment deterioration, while social and economic development continues. Based on input-output analysis, we established a dynamic optimization model among Qinhuangdao city's socioeconomic development, water resources and water environment. The 2013-2030 simulation after introducing comprehensive water resources policies of regional development, examines the regional socioeconomic development, optimizes the water resources supply structure and improves the water environment under the optimal scenario, and evaluates policy feasibility through cost-benefit analysis (CBA). The simulation results suggest that under the optimal scenario, the water-use efficiency (WE) of Qinhuangdao is improved by 59.14% and the proportion of reclaimed water and desalinated seawater in the water supply structure is increased by 13.70%. In addition, it has achieved an average annual gross regional production (GRP) growth rate of 6.36% and an average annual chemical oxygen demand (COD) emission rate of 17.95%. Moreover, the net present value (NPV) of the projects under the optimal scenario is 1.534 billion Chinese yuan (CNY), which means that the policy is economically feasible. Our research is helpful to improve the WE, optimize the water supply structure and protect the hydrogeological environment in coastal cities with water shortages and can provide a reference for Qinhuangdao city and other similar coastal cities to realize the rational utilization of water resources and regional sustainable development.

A Harmony-Based Approach for Assessing and Regulating Human-Water Relationships: A Case Study of Henan Province in China

The conflict of the human-water relationships (HWR) has further increased the water-related risks, such as water environment deterioration, water shortages, and even regional violent conflicts for obtaining usable water resources. Knowing how to evaluate and regulate the discordant HWR to form a balanced growth between sustainable socio-economy and water resources protection has become a critical issue in water resources management. The harmony theory method, which provides a new perspective for solving the conflict between humans and water, has been widely used in current studies. However, this method focuses less on the quantitative study of the balance status of HWR. This study proposes a harmony theory-based HWR evaluation method that contains a systematic process of harmony assessment, indicator identification, harmony balance constraints, and harmony regulation for assessing and regulating the discordant HWR. The Henan Province of China, which has a complicated HWR, was selected as a case study to apply and verify the approach proposed in this study. The results indicated that (1) Henan Province showed a poor harmony status. The human–water harmony degree of 18 distinctions in the province varied from 0.41 to 0.76, showing an increasing trend from 2006 to 2018, indicating that the HWR was gradually improving in recent years. (2) The human–water harmony degree showed that HWR in the southwest part of Henan Province, with less human activities, was better than that in its northeast part, which had faster social development. Sanmenxia City, located in the west part of the province, had the highest human–water harmony degree because of the recent water control projects implemented in the city, indicating that human production measures could effectively help improve HWR. (3) At present, Henan Province has serious discordant indicators in these three aspects (water system health, humanistic system development, and human-water system coordination), which proves that it is still facing pressure from both socio-economy sustainable development and water resources protection. Our results provide insight into water resources management in Henan Province and other similar regions.

Risk Assessment of Sudden Water Pollution Accidents Based on the One-Dimensional Hydrodynamic Model for Weihe River Basin, China

The frequent water pollution incidents can lead to deterioration of water environment and increase risk of endangering people’s health. According to the characteristics of sudden water pollution accidents, a one-dimensional river-water pollution model was established in this study using hydrodynamic method. Then, taking the Weihe river basin as an example, the longest distance, size of longitudinal dissociation, and the risk range of contaminants were estimated via the model. Moreover, the changes of contaminant concentration risk in the different flow were assessed by the emergency measures of water diversion, which could achieve the purpose of improving water quality in a short time, and greatly reduce the risk of water pollution accidents. The results showed that, in the flow of 30m3.s−1 and 60m3.s−1 the maximum contaminant distance moved forward 34% and 49% than natural condition. Meanwhile, the maximum concentration was decreased by 30 to 40% and the total length section was approximately reduced by 25 to 45%. These validations have showed the method is an ideal tool for making pollution accident emergency treatment. However, the parameters of the model should be adjusted for different watersheds. This study can provide the basis for the water pollution risk decision management.

Study on Strategy Planning of Sponge City Construction in Guizhou Province from the View of Resilient City

In recent years, extreme weather is constantly emerging on a global scale. Excessive development and construction of cities has changed the original water systems of citys, and lead to urban water hazards and water environment deterioration. Since 2014, after China has been vigorously promoting the plan of sponge city and relative construction, the problems of urban water systems gradually get relieved. By introducing the concept of resilience in this study into the development of sponge city planning strategies, a comprehensive and systematic top-level design of sponge city planning and construction is made from the four dimensions of ecological resilience, engineering resilience, economic resilience and social resilience. At the same time, combining with the issues in existing pilot sponge urban planning and construction process such as the lack of systematicness, integrality, fragmentation etc., based on the study case of pilot sponge city - Guiyang city in Guizhou province, with the resilience concept as the guidance, it is presented in this study the planning strategies of sponge city ecological pattern developing, systematic planning and construction guidance, and explored the extended industrial development of sponge city and the construction control mechanism, trying to provides a new way of thinking and a new approach of sponge city planning and construction related research.

Analysis of standard accounting method of economic compensation for ecological pollution in watershed

With rapid development of social industry and agriculture, there is an increasing demand for water resources in a watershed, which leads to a series of serious problems in the watershed such as water resource shortage, water environment deterioration, water resource pollution, etc. This paper builds an econometric model of economic loss due to water pollution in a watershed based on the basic process of standard water pollution compensation calculation of economic loss. The econometric model is used to calculate the amount of compensation for economic loss due to water pollution; a mathematic model method of water environment is applied to calculate the degree of effect on the lower reaches; thus the proportion of the impact on the areas in the lower reaches to overall impact is obtained. The amount of compensation that should be borne by all areas is obtained in combination of amount of compensation for water pollution. Empirical analysis is carried out by taking the Taihu Basin for example, and the standard compensation and the amount of compensation for the economic loss caused by water pollution between different areas along the Jiangnan Canal in the Taihu Basin are defined, which provides scientific and theoretical bases for standard calculation of the water pollution compensation. This provides a theoretical basis for solving the problem of water pollution in the watershed and the contradiction in the development of the watershed, and realizing social equity and harmonious development.

Optimization of water system pattern and connectivity in the Dongting Lake area

As the (Yangtze) River-(Dongting) Lake relationship changed and human activities increased,the water system pattern and connectivity in the Dongting Lake area have been also changed a lot,which exacerbated the deterioration of water environment and water ecology. Carrying out the researches on water system patterns and connectivity are important for the comprehensive improvement and ecological restoration of water systems of the Dongting Lake. Based on the network connectivity analysis method in landscape ecology,we created an evaluation index of water system pattern and connectivity including river frequency,river network density,circle degree of water system (α),node connection rate (β),and network connectivity (γ). Here,we analyze the current water system pattern and connectivity of the Dongting Lake Area compared to a planned water system,and we propose an optimized planning scheme for the studied water system. Our results demonstrate that the water system pattern and connectivity of the total area of the Dongting Lake are acceptable,but that there are large differences among sub-areas. The pattern and connectivity of the existing water system in the tail-stream area of the Xiangjiang and Zishui Rivers are at an acceptable level but are poor in the Song and Li Rivers area and the northern region of the Dongting Lake. The planned project will improve the water system connectivity efficiently in the Song-Li Rivers area,but not in the northern region. In the northern region,according to our optimized planning scheme,three indices (α,β,γ) increased by 13.2%,6.9% and 4.7%,respectively,compared to the existing water system,and our optimized planning scheme yielded an improvement of the proposed plan by 26%,9.4%,and 9.4%,respectively.

Equilibrium cost of water environmental protection based on watershed sustainability

There are multiple relationship curves between watershed socioeconomic development and water environmental conservation. The goal of this paper is to present a theoretical pattern of economic activities and water environmental improvement by incorporating their bidirectional causality relationship. The Environmental Kuznets Curve (EKC) has been useful in connecting economic and environmental concepts, thus becoming an important tool for evaluating watershed sustainability. The high governance cost makes water pollution-intensive goods relatively expensive to produce. According to the EKC, there is an inverted U‐shaped relationship between water environment deterioration and the level of social and economic improvement. Based on EKC hypothesis, we studied the coordinated relationship between environmental protection of water and economic and social sustainable development in the Huntai River Watershed from 2003 to 2012 by means of a panel threshold data. The EKC is an empirical curve that describes the relationship between economic restructuring and water environmental conditions improvement. The Green Environmental Kuznets Curve (GEKC) is used to describe the relationship among watershed pollution emissions, the environmental quality and income per capita. However, according to the GEKC, U‐shaped relationship exists between the coordination of water environmental protection and the level of social economic development (SED). The GEKC is affected by water resource consumption, the regional trade situation (T), the per capita gross domestic product level (Y), and controls on the total amount of water pollution discharge. We try to adjust to the type of GEKC curve and apply dataset of water pollutant emission reduction cost control to fit main characteristic of equilibrium cost. In accordance with Fully Modified Ordinary Least Squares (FMOLS) and Dynamic Ordinary Least Squares (DOLS) data statistical analysis, the value of the GEKC regression equation independent variables Y, Y2, per capita water resources consumption (E), T, adding value of production (AVP) and modified socioeconomic development index (MSDI) were 1.988, −0.150, 0.720, 0.216, 0.070, and 1.890, respectively. In the long-term, the correlation formula of watershed per capita sewage discharge (C) to Y was 2.090–0.300Y. For every 1% increase in E, T, AVP, and MSDI, C increased by approximately 0.720%, 0.216%, 0.072%, and 1.890%, respectively. The E, T and MSDI are key factors in developing an effective way to control the levels of water pollution discharge. Pollution is endogenous, so water environment pollution is not necessarily caused by economic growth. According to the total amount control of water pollution discharge, the GEKC equilibrium optimization calculation results can be used to effectively control watershed pollutant emissions and improve water environmental quality. Through the adjustment of industrial structure or industrial transformation and technological progress, it is possible to change the relationship between current economic growth and water environment. With GEKC related Curve characteristic and indicator classes, it is possible to realize harmonious and sustainable development of regional economy and society in the Huntai River Watershed.

Optimal adaptation pathway for sustainable low impact development planning under deep uncertainty of climate change: A greedy strategy

Robustness and cost effectiveness are major concerns for sustainable stormwater management under deep uncertainty of climate change. Given that many traditional static planning strategies are not working with unpredictable future conditions, the possibility of system failure, and the lock-in effects, the Adaptation Pathway (AP) approach was adopted for dynamically robust and cost-effective planning in this paper. In order to increase optimization accuracy of multi-staged planning, a continuous definition of the AP optimization problem was raised by improving the simplified versions in existing studies. A case study in Suzhou, a provincial pilot Sponge City in China undergoing increasing annual rainfall and severe water environment deterioration, was included by integrating Long-Term Hydrologic Impact Assessment-Low Impact Development model with optimization methods, aiming to persistently control the non-point source total phosphorus loading below an acceptable amount in the following unforeseen 20 years via multi-staged low-impact development (LID) construction. A novel optimization method developed by the authors in a companion paper, namely marginal-cost-based greedy strategy (MCGS), was successfully applied to efficiently solve the continuous version of the AP optimization problem. The popular genetic algorithm (GA) was used as a contrast. A weather generator was elaborated based on four Representative Concentration Pathway scenarios and 17 spatial downscaled general circulation models to simulate the unforeseen future annual rainfalls that helped with evaluating cost effectiveness of each prospective LID plan. Results showed that the adaptation pathways optimized by MCGS could save the whole life net present cost of an LID plan by 1%–60% compared with those optimized by GA, and the computational efficiency of MCGS was over 13 times faster than GA.

A Framework for Ecological Compensation Assessment: A Case Study in the Upper Hun River Basin, Northeast China

With the rapid socio-economic development, human disturbances are believed to have resulted in the degradation of the watershed ecosystem. The ecological damage to and environmental pollution of river basins have caused great losses. It is widely agreed upon that the protection and restoration of river ecosystems should be on the agenda. Ecological compensation, an important tool to prevent the deterioration of water environments and achieve sustainable watershed development, has attracted increasing interest as a research subject. In this study, the upper reach of Hun River basin was selected as a typical study area. The primary purpose was to determine the allocation costs of ecological compensation in different regions for the river basin. The amount of willingness-to-pay (WTP) for the eco-compensation was estimated at 3.2 million dollars by the Contingent Valuation Method (CVM). Based on linear programming techniques, a Data Envelopment Analysis (DEA) created a primary value of the allocation costs. Considering the different weights of each region, a modified coefficient was introduced to correct the primary result on the basis of a questionnaire survey of river ecological protection and construction.