Research on urban eco-environmental water requirements in Ningbo

2011 ◽  
Author(s):  
Yiqin Tong
Keyword(s):  
Environmental Water ◽  
Water Requirements

An Impossible Prescription: Why Science Cannot Determine Environmental Water Requirements for a Healthy Murray-Darling Basin

2017 ◽  
Vol 03 (03) ◽  
pp. 1650037 ◽  
Author(s):  
Samantha J. Capon ◽  
Timothy R. Capon
Keyword(s):  
Decision Making ◽  
Water Policy ◽  
Environmental Water ◽  
Management Scenarios ◽  
Water Requirements ◽  
Political Dimension ◽  
Murray Darling Basin ◽  
Alternative Water ◽  
Ecological Objectives ◽  
Ecological Science

The concept of environmental water requirements (EWRs) is central to Australia’s present approach to water reform. Current decision-making regarding environmental water relies strongly on the notion that EWRs necessary to meet targets associated with ecological objectives for asset sites can be scientifically defined, thus enabling the ecological outcomes of alternative water management scenarios to be evaluated in a relatively straightforward fashion in relation to these flow thresholds or targets. We argue, however, that the ecological objectives and targets currently underpinning the development of EWRs in the Murray-Darling Basin are insufficient to permit the identification of exact water requirements or flow thresholds. Because of the dynamic and heterogeneous nature of the Murray-Darling Basin and the myriad ways in which it is valued by people, we also assert that it is unlikely that adequate ecological objectives and targets from which to determine EWRs could ever be formulated. We suggest that the current emphasis on the concept of EWRs in environmental water planning conflates science and values, perpetuating a “how much is enough?” myth whereby the significance of the social, cultural and political dimension in environmental decision-making is diminished. We support an alternative paradigm in which the contribution of ecological science to water policy and management decisions focuses on understanding ecological responses of water-dependent ecosystems and their biota to alternative management scenarios and linking these responses to the ecosystem services and human values which they support.

scholarly journals Eco-environmental water requirements in Shuangtaizi Estuary Wetland based on multi-source remote sensing data

2018 ◽  
Vol 9 (2) ◽  
pp. 338-346
Author(s):  
Qian Cheng ◽  
Lin fei Zhou ◽  
Tie liang Wang
Keyword(s):  
Remote Sensing ◽  
Remote Sensing Data ◽  
Environmental Water ◽  
Water Requirement ◽  
Water Requirements ◽  
Sensing Data ◽  
Ecological Water Requirement ◽  
Development And Utilization ◽  
Environmental Requirements ◽  
Wetland Resources

Abstract With rapid economic development and expansion of urban boundaries, increasingly damaged wetland resources have seriously threatened the ecosystem. The study of eco-environmental requirements of wetlands is not only the basis of water resources allocation in development and utilization, but also for creating a sustainable system to maintain and improve the overall ecosystem. In this study, we used the Shuangtaizi Estuary Wetland as our study area. The breakdown of wetland cover types was extracted based on multi-source remote sensing data, providing the graphic database for ecological water requirement calculation. According to the characteristics of the Shuangtaizi Estuary Wetland ecosystem, the methods of quantifying the components of ecological water requirements were determined. The results showed that the optimum ecological water requirement of the total wetland was 239 million m3. The minimum, 75th percentile frequency, and 95th percentile frequency water requirements were 670 million m3, 921 million m3, and 1,078 million m3, respectively.

scholarly journals SDG Indicator 6.4.2: Level of water stress (2012)

2017 ◽  
Author(s):  
Chloé Meyer
Keyword(s):  
Water Stress ◽  
Environmental Water ◽  
Water Withdrawal ◽  
Economic Activities ◽  
Water Requirements ◽  
Freshwater Resources ◽  
Water Collection ◽  
Water Withdrawals

Ratio between total freshwater withdrawn by all economic activities (based on ISIC categories) and total renewable freshwater resources, after taking into account environmental water requirements (also known as water withdrawal intensity). This indicator includes water withdrawals by all economic activities, focusing on agriculture, manufacturing, electricity, and water collection, treatment and supply. SDGs Stress

Issues in environmental water allocation – an Australian perspective

2003 ◽  
Vol 48 (7) ◽  
pp. 83-88 ◽  
Author(s):  
N. Schofield ◽  
A. Burt
Keyword(s):  
Social Sciences ◽  
Policy Development ◽  
Water Allocation ◽  
Environmental Water ◽  
Critical Issue ◽  
Current Understanding ◽  
Water Requirements ◽  
Law And Policy ◽  
Future Needs ◽  
Scientific Advances

Environmental water allocation is a critical issue in Australia and internationally. It has been prominent in Australia for a little over ten years during which time major policy and scientific advances have been made, but little implementation. This paper examines current understanding of environmental water allocation across a broad range of disciplines including the biophysical sciences, social sciences, economics, law, and policy. Development of practical methods for assessing environmental water requirements and experience with implementation in Australia are discussed. The paper concludes with thoughts on future needs.

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