Analysis of water carrying capacity in Pulubala sub-watershed, Gorontalo Regency, Gorontalo Province

<p>Enviromental carrying capacity was measured in three methods,i.e land capability, land carrying capacity and water carrying capacity. Garut Regency which is located at the upstream Cimanuk Watershed has an important role in the sustainability of capacity for downstream area. The aims of this study are: (1) to identify land use in Garut Regency in 2009, (2) to identify land capability in Garut Regency, (3) to assess the suitability of land use with land capability and space pattern in Garut Regency, (4) to identify the status of environmental carrying capacity in Garut Regency, and (5) to set a space pattern based on environmental carrying capacity. Based on the interpretation of Landsat Satellite Imagery in 2009, dryland agriculture has dominated the coverage about 45.4% and forest cover about 23.8%. This study also shows that most area in Garut Regency is belong to Class IV land capability (36.4% of the regency area) without Class I of land capability. Suitabilty evaluation between land cover and land capabilty describe that 48,45% area is suitable, 50.4% area is not suitable and 1.18% area is conditionally suitable depending on limitation factors that affect land capability. Another evaluation between space patern and land capability shown that 59.0% area is suitable, 32.1% area is not suitable, and 8.84% area is conditionally suitable. Both status of land carrying capacity and water carrying capacity are deficit. According to spatial pattern based on land capability and existing forest, space that can be use as the preservation area is about 58.5% of the area, and space that can be use as the cultivation area is about 41.5% of the area of Garut Regency.<br />Keywords : Land capability, land cover/use, spatial pattern, water carrying capacity</p>

The carrying capacity of regional water resources has become a hot topic in water resources research. Siwaluh watershed is one of the areas that need to be assessed for water carrying capacity because the area is very dynamic. This research aims to monitor the carrying capacity of water based on the need and availability of water in the Siwaluh watershed. The Water Carrying Capacity Assessment is based on the Regulation of the State Minister of the Environment Number 17 of 2009 concerning Guidelines for Determining the Environmental Carrying Capacity in Regional Spatial Planning. The water carrying capacity in the Siwaluh watershed is mostly in deficit, meaning domestic water demands are more significant than water availability. However, two villages have a surplus carrying capacity, namely the village in the upstream area, namely Gerdu Village, Karangpandan District and Plumbon Village, Karanganyar District. Gerdu Village and Plumbon Village have Surplus Carrying Capacity because water availability is greater than the need for water. The results of this study are expected to be used as a reference for sustainable management of water resources so that people can enjoy the water for a more decent life.

Floating cage fish farming is an aquaculture activity that is mostly carried out on the coast of Pekalongan. The purpose of this study was to estimate the carrying capacity of Pekalongan coastal waters as a floating net cage aquaculture activity zone. The research method used is descriptive qualitative and quantitative descriptive by calculating the indicators of Trophic Status Index (TSI), phosphorus, feed conversion ratio, and the carrying capacity level of the waters. The results showed that chlorophyll-a values ranged from 6.44-8.24 ꭒg/L, total phosphorus 12.44-14.80 ꭒg/L, feed conversion ratio 1.10-1.25, TSI (Trophic Status Index) values 48.2-54.6, harvested biomass 120-157 kg/ floating net cages (KJA). The carrying capacity of the waters for KJA cultivation is 145.43 tons of fish/year, and the number of existing KJA for cultivation is 110 KJA. The conclusion from the results of this study is that the carrying capacity on Pekalongan coastal waters when used as a floating net cage aquaculture activity zone is estimated to be able to accommodate approximately 145.43 tons of fish/year or the equivalent of 121 KJA. Currently, there are 110 KJA plots in the Jeruksari coastal waters, which means that the maximum carrying capacity of the waters that can be used for KJA cultivation is 11 KJA.

The upstream watershed area (DAS) has a function as a buffer zone. The Merawu watershed is one of the upstream parts of the Serayu watershed which is dominated by agricultural land. The declining carrying capacity of the Merawu watershed is indicated by the imbalance between supply and demand for resources in the Merawu watershed. For a long time, it can interfere with the function of the soil as life support. The research objectives are: 1) analyzing the carrying capacity of the Merawu watershed through 3 approaches, namely: ecological footprint (land capacity), water capacity, and land protection capacity. The research method used is to compare supply and demand. And 2) Formulating a recovery strategy in the Merawu watershed based on an analysis of the environmental carrying capacity and focusing on increasing the carrying capacity. The results showed that the Merawu watershed has the carrying capacity of the protection function in the overshoot condition, the water carrying capacity in the conditionally-save condition, and the carrying capacity of the land in the overshoot condition. There are five watershed recovery strategies in the upstream, middle and downstream areas to increase carrying capacity.

With the acceleration of urbanization and increasing energy consumption in China, the intensity of pollution emission the pollution load is increasing significantly. In many rivers, the main pollutant load is much more than the environmental capacity of the water, resulting in the destruction of the structure and function of the river basin. This paper puts forward the concept of water environment carrying capacity, and constructs the basic model of calculating water environment carrying capacity, and then takes ErhaiRiver as an example to calculate the carrying capacity of water environment in order to provide reference for relevant researchers. Concept of Water Environment Carrying Capacity With economic and social development, parts of the ecosystem in the rivers and lakes have degraded. In order to improve the ecosystem in the rivers and lakes, we proposethe new theory of ecosystem in the rivers and lakes. Formed in the ecosystem in the rivers and lakes the continuity of the process based, longitudinal arranged in the river lake, is of a mosaic of specific ecological functions of plaque composition. Based on the analysis of the basic characteristics of river basin water ecological system, combined with other related disciplines, the related research results of water environmental carrying capacity, water resources carrying capacity, ecological carrying capacity, ecological protection as the goal, defining the basic connotation of river basin water ecological environment, the water ecological carrying capacity is defined as: water ecological carrying capacity is in the water ecological function area, and can support the ecological system structure and function and sustainable development. The connotation of water ecological carrying capacity of the river basin is mainly from the connotation of ecological connotation and economic society. River Basin water ecological carrying the ecological connotation of force can achieve maximum ecological development of aquatic ecosystem health scale.Lakes and river ecological system in the process of basin of matter and energy cycle has the important function of habitat, filtering, shielding, a channel. However, due to the rapid development of human society and economy, the structure and International Conference on Economics, Social Science, Arts, Education and Management Engineering (ESSAEME 2015) © 2015. The authors Published by Atlantis Press 247 function of the internal ecosystem of the river basin have been destroyed, and the stability of the ecosystem cannot be guaranteed. Therefore, there is an ecological limit regulation in the game of the river basin water ecological system and social economic system. The ecological limit of water ecosystem cannot be separated from the value of the specific area population and the specific utility needs. In the same water resource utilization and sewage discharge, the social economic capacity or scale will be different, which will make the ecological carrying capacity of water has a social and economic connotation. In recent years, the contradiction between ecologicaland economy are becoming more and more obvious, and the understanding of the economic connotation should more reflect the relationship and mechanism between the main body and object of the river basin water ecological carrying capacity. We should adjust the internal structure, growth mode and spatial distribution of the social economic development. Evaluation Model of Water Environment Carrying Capacity This paper constructs basin water environment bearing force calculation method of the system, development of reaction ErhaiRiver water dynamics. Lake water dynamics and water quality model and in the model as a calculation tool, according to the water environment bearing capacity calculation method of system, calculate the Erhai River, the main pollutants of water environment bearing capacity. Water Quality Coefficient. The equilibrium concentration field can be regarded as the linear superposition of the different pollution sources. We assume i C is the separate concentration fielding of number i pollution sources i Q . bi C is the background concentration of the water quality control point, the concentration field in the presence of n pollution sources:

Complete facilities and good infrastructure are the main point why Tangerang Regency is a strategic area for industrial activities. Many business operator and developer tempted to build industrial estate. But various economic and social activities in industrial estate tend to affect and change the physical condition of the environment. Environmental carrying capacity becomes one important component to understand the ability of environment in supporting every organism’s activity. This research aims to analyze environmental carrying capacity in an crucial industrial estate in Tangerang Regency, that is conducted by seeing two main elements : land carrying capacity and water carrying capacity. The selection of research location was conducted based on the complexity of industrial activities and the scale of the industry. Quantitative method was applied and data analysis was done to analyze the current status of water carrying capacity and land suitability. Water demand in the study area is higher than the supply, it is cause a deficit condition in water carrying capacity. Meanwhile, the soil types (alluvial and mediterranean) have a low erositivity levels, so it will be safe for industrial activities. Furthermore, geography and hydrology condition is very compatible for an industrial estate.

Sustainable development is essentially related to information on food carrying capacity, water carrying capacity, trends in changes in environmental service performance over a period of time, and the status of permits for the utilization of natural resources in a region. In this theme, Malinau Regency plays an important role in the growth of carrying capacity and the environmental load capacity. The research results explain that service performance is more inclined towards food aspects and environmental impacts by providing food in the southern part, such as in the Kayan Hilir District. In modelling food provider carrying capacity, several stages are conducted, namely determining food needs, food availability, the difference in food supply availability, the population threshold against food supply carrying capacity, until the status of food carrying capacity in Malinau Regency can be known. The status has not exceeded the threshold, indicated by the population being lower than the threshold, so the location is still able to support its food needs. Thus, the capacity of support and carrying capacity will have a positive impact on the quality of the environment, especially in determining food needs based on land quality and climate that affect it.

Index system of urban resource and environment carrying capacity based on ecological civilization

The preparation of regional spatial plans must be guided by the analysis of environmental carrying capacity and carrying capacity, the method of measuring environmental carrying capacity and carrying capacity based on ecosystem services with a spatial approach has a more appropriate use value. This study aims to identify and analyze the environmental carrying capacity and carrying capacity based on ecosystem services in the RTRW Cultivation Area of ​​Bengkayang Regency in 2025-2045. The research method uses the main basic data approach, namely the characteristics of the landscape ecoregion, natural vegetation communities, and land use. Data analysis uses expert-based evaluation methods, pairwise comparisons, and weighted sums to obtain the value of the ecosystem service index. The results of the study obtained water carrying capacity in accordance with the Decree of the Minister of Environment and Forestry No. 146 of 2022, the carrying capacity of water supply ecosystem services is dominated by the medium category of 61.126%, the carrying capacity of food supply services is high category 54.20%, the carrying capacity of climate regulation ecosystem services is dominated by the high category 54.83%, the carrying capacity of disaster protection ecosystem services is dominated by the high category 77.64%, the carrying capacity of flora and fauna supporting ecosystem services is dominated by the low category 88.73%, and the carrying capacity of genetic resource providing ecosystem services is dominated by the high category 63.75%. The conclusion is that the cultivation locations in the Bengkayang Regency RTRW for 2025-2045 are generally in accordance with the carrying capacity and environmental capacity based on ecosystem services.

当前环境规划中有用生态承载力测算代替环境承载力研究的现象。生态承载力分析要点是资源，环境承载力的研究要点是环境容量与人类活动的阈值。环境规划的目标是既要保持经济持续发展，又要提升环境质量，将各种排污总量控制在环境容量之内。任务就是要测算与提升环境承载力，可以根据区域监测、统计数据，建立系统动力学的多目标优化模型，进行科学分析；对可能的发展模式进行讨论，预测各种模式下经济、能源、环境的发展趋势并测算多项阈值。生态足迹法是用生产性土地的面积来评估生态承载力，难直接评价人类活动阈值。因此环境规划中不宜用生态承载力替代环境承载力进行测算。 At present, there is a phenomenon that the analysis of environmental carrying capacity has been replaced by the analysis of ecological carrying capacity in some environmental planning. Ecological carrying capacity focuses on resources, and the keys of environmental carrying capacity include environmental capacity and human activity thresholds. The purpose of environmental planning is to coordinate the economic development and environmental protection, improve the environmental carrying capacity, and control the total emission within the environmental capacity. An important mission of planning is predicting the economic, energy and environmental trends under several scenarios, calculating environmental carrying capacity thresholds by establishing a multi-objective System Dynamics model based on regional monitored and statistic data for a more scientific analysis. Ecological footprint method is to use the area of productive land to assess the ecological carrying capacity, but it is difficult to evaluate the human activity thresholds directly. Therefore, in the compiling of environmental planning, the environmental carrying capacity should not be replaced by ecological carrying capacity analysis.

Introduction: In Jakarta, rapid urbanization and population increase have led to serious environmental problems such air pollution, water scarcity, and land degradation. Excessive economic activity and population growth are placing pressure on the city's environmental carrying capacity, which is leading to a decline in living standards and an increase in demand on natural resources. Green open space in Jakarta has decreased significantly, currently at 9.8%, below the minimum requirement of 30%. Methods: This study uses a system dynamics approach to assess Jakarta’s environmental carrying capacity in the context of a sustainable city. Finding: The study shows that Jakarta’s land carrying capacity has decreased since 2018, with indications that water carrying capacity will decrease by 2032 if Jakarta do business as usual. Future scenario suggest that reducing the rate of land turnover and improving water flow will significantly improve the city’s environmental sustainability. For example, reducing land change by 20-40% can restore land carrying capacity by 2040. Conclusion: By implementing policies that focus on reducing land change and improving water infrastructure, Jakarta can improve the quality of life and quality of life for its residents. The novelty of this study is that it integrates the concept of smart sustainable cities with system dynamics modelling to assess environmental sustainability and provides a comprehensive framework that can be adapted by other cities facing similar challenges. The report highlights gaps in current practices, such as the need to better integrate water and green space infrastructure, advanced technologies for water management, and overall land restoration strategies.

Water resources and environment planning in rural areas are receiving more and more attention in China. This study constructs an analytical framework that integrates system dynamics (SD) model and environmental carrying capacity to discern water use governance actions in rural areas at the county scale for the next two decades. The SD model includes the dynamics of agriculture, livestock farming, industry, and human population on water resource demand and wastewater discharge. Governance actions are determined based on the ratio of water demand and water supply capacity, and the ratio of pollutant discharge and environmental capacity. Taking Liuyang County in Hunan Province, China as a case study. Four scenarios are compared including baseline, reduced discharge, reduced water use and integrated development scenario. It proposes the deadline of treatment actions and governance focus under different scenarios. The proposed framework provides a useful decision tool for rural areas in developing countries.

Sustainable economic development, especially the industrial sector, is an important agenda in improving the welfare of the population. The problem that arises is that land use for industry is dominant compared to considerations of the carrying capacity. This study aims to analyze the carrying capacity of the environment, especially land and water in the industrial growth center region (WPPI) South Riau. This study will quantify the potential of WPPI and its impact on the environment using the ECC approach. Data analysis was carried out using quantitative and descriptive analysis methods. Quantitative method is used to analyze the carrying capacity of the environment and descriptive method is used to analyze the recommendations resulting from the calculation of the carrying capacity of the environment. The land for the development of industrial areas is mainly peat domes and marine. The status of the carrying capacity of the land experienced a deficit, namely the regencies of Indragiri Hilir, Indragiri Hulu and Kuantan Singingi. The need for raw water/clean water in industrial growth centers reaches 3,758 liters/second. The land carrying capacity in the study area is dominantly low and the water carrying capacity is very low.

With superintensive technology, Vannamei shrimp (Litopenaeus vannamei) farming can increase shrimp production. Shrimp production in superintensive ponds can reach 50 tons per hectare, equivalent to 60 years of production in traditional technology. However, high stocking density with feeding can result in the waste of organic matter into the environment at the time of water change. Sustainable intensive ponds can stand to achieve qualification since their development exists based on water carrying capacity. This study aims to analyze the status of water quality and determine the carrying capacity of waters for developing intensive ponds of vannamei shrimp in Gantarang and Bontobahari Districts, Bulukumba Regency. The results showed a change in water quality status based on distance from the beach and the season. In Gantarang District, intensive pond development can still be carried out based on the oxygen and nitrogen carrying capacity of waters of 56 ha and 110 ha, respectively, while in Bontobahari District, there are 55 ha and 109 ha, respectively.

The Regional Disaster Management Agency (BPBD) of Gresik Regency in 2019 stated that some villages in the Driyorejo District, Gresik Regency experienced drought, this condition is in contrast to the availability of water in 2012. The purpose of this study is to determine the spatial pattern of the carrying capacity of water resources. and direction of control policies for the carrying capacity of water resources. The research method used quantitative and qualitative descriptive analysis with the analysis technique of Water Bearing Capacity (DDA), Analytical Hierarchy Process (AHP) and spatial analysis using Arcgis 10.1 Software. Data collection techniques in the form of observation, documentation, questionnaires and agency surveys. The results showed that the water carrying capacity in Driyorejo District was 99.7% surplus and 0.3% deficit. The status of deficit water carrying capacity is in Petiken and Mojosarirejo Villages, especially in the industrial and service trade sectors. The main priority for the direction of the water carrying capacity control policy based on AHP is to improve land rehabilitation, development of infrastructure and improve the quality and quantity of water sources with scores of 161.4, 98 and 40.6, respectively.