Evaluation of Water Resources Carrying Capacity in Gansu Section of Yellow River Basin Based on Fuzzy Comprehensive Evaluation Model

As a basic natural resource and strategic economic resource,the development and utilization of water resources is an important issue related to the national economy and people's livelihood.How to scientifically evaluate the water resources carrying capacity is the premise to improve the regional water resources carrying capacity and ensure the regional water security.The Gansu section of the Yellow River basin is an important water conservation and recharge area.Whether the water resources in this area can ensure the normal operation of the ecosystem and whether it can carry the sustainable development of social economy is the key to realize the high-quality development of the Yellow River basin.In this study,from the three dimensions of water consumption per capita,water consumption of 10000 yuan GDP and ecological water use rate,by constructing the evaluation index system and index grading standard of water resources carrying capacity,the fuzzy comprehensive evaluation model was used to evaluate the water resources carrying capacity of Gansu section of the Yellow River Basin,in order to provide theoretical decision-making basis for the comprehensive development,utilization and planning management of water resources in Gansu section of the Yellow River basin and even the whole basin,and help the high-quality development of the Yellow River basin.

Dynamic evaluation of water resources carrying capacity of the Dianchi Lake Basin in 2005-2015,based on DSPERM framework model and simulated annealing-projection pursuit model

With the intensi fed impact of human activities,most lakes have been severely disturbed and the lake ecosystem has been seriously damaged,which exerted a great impact on the living envi-ronment of human beings in the lake basins.The health of the lake ecosystem has gradually become one of the hot issues in recent years.In this study,the water resources carrying capacity(WRCC)was used to reveal the chain rel ationship between human activities and water environ-ment in the economic dewelopment of the Dianchi Lake Basin in Kunming City of China during 2005-2015.Specifically,we chose 25 ewaluation indicators related to the water environment and socialeconomic activities,classified them into six subsystems,Le,the driwing force subsystem(D),the water resources si tuation and consumption subsystem(S),the water resources pressure subsystem(P),the water environmental situation subsystem(E),the response subsystem(R),and the management subsystem(M),and built a comprehensive assessment system-DSPERM frame-work model.Si mulated annealing-projection pursuit model which reflects the structure or feature of high-dimensional data was adopted to calculate the WRCC of the Dianchi Lake Basin during 2005-2015 by weighting each evaluation indicator and each subsystem of the DSPERM frame work model.The resuls show that the WRCC of the Dlanchi Lake Basin was in level II(medium carying capacity)from 2005 to 2012.Since 2013,the WRCC has been at level II(strong carying capacity),and from 2005 to 2015,it showed a gradual upward trend.The evaluation indicators of each subsystem varied greatly and exhibited different development trends.The indicators of the water resources pressure subsystem had the greatest impact on the WRCC,followed by the in-dicators of the water environmental si tuation subsystem and the water resources situation and consumption subsystem.We recommend that the DSPERM framework model and the simulated anneal ing-projection pursuit model constructed in this work can be used to analyze the dynamic changes of the WRCC over the years.They have the advantages of practicability and feasibilty,and can provide the basis for the scienti fic decision-making and comprehensive management of regional water environment planning.

Shallow sub-lakes are essential for sustaining the successful wintering of waterbirds in Poyang Lake,China

For migratory waterbirds,the quality of wintering habitat is related to spring migration and successful breeding in the next year.The availability of food resources in the habitat is critical and varies within water levels.Although the water-level fluctuations in Poyang Lake have been extremely variable interannually in recent years,the wintering waterbird populations have remained relatively stable.Hence,the mechanism of maintaining the stability is worth exploring.This study aimed to compare the distribution of vegetation and herbivorous wa-terbirds in 2015-2016 and 2016-2017,focusing on three shallow sub-lakes and one main lake are.The results showed that the emergence of tubers and the growth of Carex spp.provided a continuous food supply and habitat for wintering waterbirds with a gradual decline in the water level.Shallow sub-lakes supported almost all of the tuber-eating waterbirds(1.42-1.62×10^(5))and most geese(1.34-1.53×10^(6)).However,the main lake area,covered with Persicaria hydropiper,did not provide adequate and accessible food.This resulted in almost no distribution of tuber-eating waterbirds,with only a few geese congregating in early winter.Our results demonstrated that the shallow sub-lakes under human control provided a different environment from the main lake and are key to sustaining the successful wintering of hundreds of thousands of migratory waterbirds in Poyang Lake.Therefore,we recommend refining the anthropogenic management of the shallow sub-lakes to regulate the water level to ensure the carrying capacity of Poyang Lake.

Ecological and environmental water demand of the lakes in the Haihe-Luanhe Basin of North China

The purpose of this paper is to present a brief concept of the ecological and environmental water demand of lake. The present situation and affecting factors of lake ecological system in the Haihe\|Luanhe Basin of North China was analyzed. The calculating method of the ecological and environmental water demand of the lake basis on the water body and the calculating method of the ecological and environmental water demand of the lake basis on the aquatic ecosystem, wetland and vegetation were compared and discussed. As the examples of Baiyangdian Lake and Beidagang Lake in Haihe\|Luanhe river basin, the ecological and environmental water demand of the two lakes was calculated to be 27×10\+8m\+3. It is 6.75 times to the water demand according to the calculating method of the ecological and environmental water demand of the lake basis on the water body. The research result indicated: (1) The calculating methods of the ecological and environmental water demand of the lake basis on the aquatic ecosystem should be better than only basis on the water body of lake. (2) The data, such as area of the vegetation kind around and in the lake, the vegetation coefficient, the evaporating amount of the vegetation and the vegetation water demand itself around and in the lake are lack and urgent need. Some suggestions for controlling and regulating the water resource of the lake in North China were proposed.

Comprehensive Assessment of Water Environment Carrying Capacity of Yunnan Province

Based on the concept and connotation of water environment carrying capacity, taking Yunnan Province as a case, this paper built water environment carrying capacity evaluation system from the perspectives of water resources, water environment carrying capacity and socio-economic development, and applied the index evaluation model to analyze the trends of water environment carrying capacity in Yunnan from 2006 to 2014. The results showed that, during those years, the evaluation value of water environment carrying capacity ranged from 0.23 to 0.46 in Yunnan Province.The minimum value was 0.23 in 2013, the maximum value was 0.46 in 2010. From 2006 to 2014, the evaluation value of water environment carrying capacity was less than 0.5 in general, and the water environment in a fragile state on the whole.

The concept, connotation and method of representation of watershed water environment carrying capacity （WWECC）

Based on the relationship between water environment system and human society, water environment carrying capacity （WECC） probes into supporting ability of complex water environment system to the human society. Recent years, due to the shortage of water resources and serious water pollution in several watersheds in China, the research of watershed water environment carrying capacity （WWECC） becomes very important. The conception, connotation and method of representation of WWECC are discussed deeply in this paper. It shows that WWECC is a kind of index that instructs whether the water environment system in watershed can continue to support the development of social economy and ecology, it is dimensionless number.

Evaluation of water resources carrying capacity of Gonghe basin based on fuzzy comprehensive evaluation method

Gonghe Basin belongs to arid and semi-arid climatic zone, where water resource is relatively scarce and desertification is serious, so it is necessary to find out water resources carrying capacity. By using fuzzy comprehensive evaluation method, the assessment on water resources carrying capacity in Gonghe Basin was conducted: Water resource carrying capacity of Gonghe County is less, while that of Guinan County and Chaka Town of Wulan County are greater; water resources of Gonghe Basin could sustain cultivated land of 652.6 thousand acres and grassland of 2 368.6 thousand acres respectively in 2020, water resources of Gonghe Basin could sustain cultivated land of 948.2 thousand acres and grassland of 2 247.6 thousand acres respectively in 2030.

Exploration of the dynamic water resource carrying capacity of the Keriya River Basin on the southern margin of the Taklimakan Desert,China

The water resource carrying capacity(WRCC)in river basin changes dynamically under climate change,economic development,and technological advancement.Climate change affects hydrological processes and spatial/temporal distribution of water resources;while economic develo-ment and technological advancement can also affect the balance of water resources systems.Under climate change,economic development,and technological advancement,itis of great significance to explore the dynamic behavior of WRCC in river basins.This will help to alleviate water resources security issues and build a sustainable water resources system.This study was carried out to evaluate the dynamic WRCC using the"climate,economics,and technology-control objective inversion mode",which used total water consumption,water-use efficiency,and restrained total pollutant control in the water functional area as boundary conditions.This study was conducted on the Keriya River Basin,a sub-catchment located in southem margin of the Taklimakan Desert.The WRCC in the Keriya River Basin in 2015 was calculated,and the trends in the short term(2020),middle tem(2030),and long term(2050)were predicted.The results revealed that climate change factors have a positive effect on WRCC in the Keriya River Basin,which leads to an increase in total water resources.Economic and technological development exhibits an overall positive effect,while increasing in water consumption and sewage discharge exhibit a negative effect.

Safety Evaluation of Water Environment Carrying Capacity of Five Cities in Ningxia Based on Ecological Footprint of Water Resources

[Objectives]To make safety evaluation of water environment carrying capacity of five cities in Ningxia based on ecological footprint of water resources.[Methods]With the help of the grey relational model,15 indicators were selected from the natural,economic,and social aspects,and the most influential factors in the three fields were selected.Based on the concept of ecological priority,the water resources carrying capacity of the five cities in Ningxia from 2010 to 2019 was calculated with the help of the water resources ecological footprint model.Then,the indicators of the water resources ecological footprint model were coupled with the existing indicators to establish a comprehensive evaluation indicator system.Finally,the changes of the water environment carrying capacity of the five cities in Ningxia were analyzed with the help of the principal component analysis(PCA).[Results]The ecological pressure of water resources and the ecological deficit of water resources in the five cities were relatively large.Specifically,Yinchuan City had the most obvious deficit of water resources but good carrying capacity;Zhongwei City had a large ecological deficit of water resources,poor carrying capacity,and the largest ecological pressure index of water resources;Guyuan City had low water resources ecological deficit,water resources ecological carrying capacity and water resources ecological pressure index.[Conclusions]Through the analysis of the coupling indicator system,it can be seen that the water environment carrying capacity of the five cities is in an upward trend,indicating that the water environment in each region tends to become better.

Water Environment Carrying Capacity of New Zhengdong District in Zhengzhou City

Taking sections of the Dongfeng Canal, the Xionger River and the Wei River in New Zhengdong District for example, this paper applied water environment capacity to analyze the carrying capacity of surface water environment in the east development zone of the city. The analysis shows that carrying capacity of surface water environment in the study area is not good, carrying capacity of 3 studied waters for TP, BOD_5 and COD is approaching to the limit. New Zhengdong District, in terms of industrial structure, should promote the projects with less water consumption, less or no discharge of wastewater, and also should enhance the sewage treatment, improve recycling rate of the reclaimed water, and reduce the negative impact of sewage and pollutant discharge on environment.

哈尔滨市水资源环境承载能力评价

哈尔滨市是全国主要缺水城市之一.为了合理使用水资源,维持水资源的可持续发展状况,维护社会经济,进行哈尔滨市水资源环境承载能力评价研究显得十分必要.本研究分析了水资源环境承载力主要影响因素,采用隶属度函数确定各单项指标隶属度,结合Delphi法得出评判结果矩阵,并采用数据离散化,提高了此评价方法的表达能力.根据水资源环境承载力评价结果,分析了哈尔滨市水资源环境承载力变化趋势,为以后相关研究提供了依据.

流域国土空间水资源承载力评价及保护方法研究

量化测度水资源承载力并制定相应的水资源保护措施,对于区域国土空间可持续发展极为重要。运用DPSIR框架,评价了梁子湖流域的水资源承载力,并对评价结果进行空间落位。基于评价结果,使用FLUS模型模拟未来发展趋势,划定了区域国土空间功能优势区,并综合评价模拟结果,确定了梁子湖流域的水环境保护格局。从量化测度和情景模拟两个方面构建了一套切实可行的流域国土空间水资源保护规划技术路径,可为区域水资源保护目标导向下国土空间规划与生态保护提供参考。

太湖流域水环境治理工程土地节约集约利用评价研究

土地节约集约利用评价及其障碍因子诊断对固守耕地红线、保障国家粮食安全具有重要意义,以太湖流域为例,从建设过程和建设结果两方面构建水环境治理工程土地节约集约利用评价体系,选择信息熵改进TOPSIS模型研究太湖治理工程土地节约集约利用现状及变化趋势,并通过障碍度模型进行障碍因子诊断。研究结果表明:太湖治理工程土地节约集约综合利用水平整体随着时间的推移呈平稳上升趋势,太湖治理工程土地集约利用水平排序依次为新孟河工程(0.564 4)、新沟河工程(0.480 5)、走马塘工程(0.431 6),均处于适度利用等级(Ⅲ级),存在较大提升空间;影响太湖治理工程土地节约集约利用的障碍因子存在差异,障碍度变化各不相同,但总体呈现障碍因子集中、重要障碍因子具有较为明显共性的特点。

长江流域建立水资源刚性约束制度的关键问题与对策研究

南方丰水地区建立水资源刚性约束制度,是为了更好地促进生态环境高水平保护和经济社会高质量发展。基于长江流域水资源开发利用、管理现状及特点,分析了长江流域建立水资源刚性约束制度需重点研究的关键问题,并从水资源和水环境承载能力、用水定额标准、计量监测、水资源规划论证、监管考核和市场机制等方面,提出长江流域建立水资源刚性约束制度的对策建议。

流域水环境治理中的农民参与激励机制优化路径研究——基于四湖流域375份农民样本的分析

四湖流域水环境保护与治理的过程中,农民参与激励机制不健全,农民参与动力缺乏,“虚置”参与现象严重。借鉴波特-劳勒综合激励模型中激励→努力→绩效→奖励→满足的良性循环精髓,聚焦农民在水环境治理中的主要内容和关键环节,从目标驱动、绩效评估、奖惩激励、监督反馈等方面系统完善激励机制,优化农民参与水环境治理的路径,为监管部门提供科学决策依据。

黄河流域水环境问题研究现状、挑战与展望

黄河流域生态保护和高质量发展是国家重大发展战略,保护黄河是事关中华民族伟大复兴和永续发展的千秋大计.近年来,黄河流域水环境质量明显改善,但有限的水资源和脆弱的生态系统使得黄河流域水环境保护仍面临巨大的挑战.科学诊断黄河流域重大水环境问题是新时期治理黄河的前提和关键.本文围绕黄河流域水环境问题诊断这一主题,聚焦黄河流域断面水质改善的核心需求,首先分析黄河流域水环境现状,发现黄河流域整体水质持续向好,但干支流水质改善不同步,流域主要污染指标时空差异显著,中下游和部分支流污染严重;其次梳理国内外相关研究进展和主要挑战,总结断面水质提升所需的核心理论与技术,如水环境承载力评价、污染排放清单构建与水环境模型模拟等方面的应用与发展趋势,发现黄河流域存在气候变化影响下水沙变化大、现有排放清单分辨率不足、水环境模拟缺乏多尺度污染排放-断面水质响应关系研究等问题,难以支撑未来精细化水环境管理.对黄河流域水环境研究的未来发展进行了展望,建议未来在以下几个方面开展进一步研究,包括气候变化下黄河流域水环境承载力研究、黄河流域高分辨率排放清单构建、多尺度污染排放与断面水质响应关系.

无锡市区水资源与水环境承载力动态特征研究

水资源和水环境问题已成为无锡市社会经济发展的重要制约因素。文章从社会经济-水资源-水环境系统互馈机理出发,采用空间系统动力学方法建立“社会经济-水资源-水环境”耦合模型,对不同气候和社会经济发展情景下无锡市区水资源和水环境承载力的时空动态特征进行研究。结果显示:①不同情景下各行政区水资源和水环境承载系数满足滨湖区>锡山区>惠山区>新吴区>梁溪区的关系;②不同情景下水资源和水环境承载力有所差异,节水型丰水年(C1)情景下梁溪区、滨湖区、锡山区、惠山区和新吴区水资源承载力系数和水环境承载力系数月平均值分别是发展型枯水年(B3)情景下的2.23倍和2.36倍、2.13倍和3.22倍、2.13倍和2.55倍、2.12倍和2.53倍、1.58倍和1.74倍。实践表明,空间系统动力学模型能在时间和空间上协调处理社会经济与资源环境之间的关系,使模拟结果更加接近实际情况,可为同类地区的水资源管理提供科学依据。

基于熵权TOPSIS的黄河流域甘肃段水资源承载力评价

为评价黄河流域甘肃段水资源承载力,以黄河流域甘肃段4个二级分区为研究对象,初选20个评价指标,利用信息敏感性和相关性分析法剔除敏感性较低和相关性较高的7个指标,最终确定13个评价指标。从系统角度将指标分为水资源、社会、经济、生态环境4个子系统,利用熵权法与TOPSIS模型结合的方法计算综合得分,并利用障碍因子诊断模型分析4个二级分区的水资源承载力障碍因子。结果表明:空间维度上,黄河流域甘肃段水资源承载力存在空间差异性,龙羊峡以上分区水资源承载力最高,龙羊峡—兰州分区与兰州—河口镇分区水资源承载力次之,龙门—三门峡分区水资源承载力最低;时间维度上,除龙羊峡以上分区外其余3个二级分区水资源承载力均有缓慢上升趋势;人均水资源量、产水模数、人均供水量、人口密度、城镇化率及生态环境用水率是影响黄河流域甘肃段水资源承载力的主要障碍因子,建议优化水资源配置、调整用水结构、促使经济发展与水资源承载力相匹配等,以提升及保持黄河流域甘肃段水资源承载力。

基于生态安全的毛乌素沙地水资源承载力评价

毛乌素沙地地区作为我国生态治理成功有效的典型区域,相较于其他主要沙漠、沙地而言,具有资源丰富、水热配合好等优点,同时也是受到人类活动及气候变化威胁较大的生态脆弱区,如何保障生态安全的同时协调社会经济高质量发展,成为了当地所需解决的首要难题。以内蒙古鄂尔多斯毛乌素沙地地区为研究对象,构建基于生态安全的综合水资源承载力评价体系,运用投影寻踪法计算综合水资源承载力评价值,引入障碍度模型遴选地区承载力优势指标与劣势指标,采用耦合协调度模型测算资源-生态-社会系统耦合发展现状。结果表明:2000年至今毛乌素沙地地区的水资源承载力总体时间上呈现曲折上升趋势,但仍有提升空间,在空间上形成了“南北高,中心低”的空间分布特点,期间地下水供水能力、灌溉水利用系数和三产用水定额等是水资源承载力系统的主要“优势指标”,而人口、灌溉面积以及城镇化率则是阻碍水资源承载力提升的关键“劣势指标”,地区内各旗县耦合协调度从“十五”规划至今一直在中等水平范围内浮动。

基于DPSIR模型的梁子湖流域水资源承载力评价与保护策略

水资源承载力评价是“双评价”的重要内容,是国土空间规划的前提和基础。如何全面量化测度水资源承载力并对接国土空间规划进行区域空间格局优化,是梁子湖流域社会经济可持续发展中亟待解决的问题。本文选取社会、经济、生态多维度评价指标,以Arc GIS为平台,通过构建DPSIR评价模型,对梁子湖流域2020年水资源承载力进行评价并将评价结果进行空间落位。研究结果表明,基于DPSIR模型构建的梁子湖水资源承载力评价体系中,驱动力子系统权重占比最大,人为调控对水资源承载力具有较大影响。流域2020年水资源承载力总体居于良好水平,各城市之间由于社会经济发展水平的不同以及地形地貌差异,其水资源承载力也存在显著区域差别,水资源承载力高的区域,应以保护为主,水资源承载力较高的区域,应保护与开发并举,水资源承载力较低的区域,要以污染防治,控制规模为主。通过探索梁子湖流域水资源承载力从评估框架到保护实施的技术方法,以期为流域国土空间规划与生态保护提供参考。