The Experts below are selected from a list of 15870 Experts worldwide ranked by ideXlab platform
Hong Yang - One of the best experts on this subject based on the ideXlab platform.
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burden shifting of Water Quantity and quality stress from megacity shanghai
Water Resources Research, 2016Co-Authors: Xu Zhao, Hong Yang, Rosa Duarte, Martin R Tillotson, Klaus HubacekAbstract:Much attention has been paid to burden-shifting of CO2 emissions from developed regions to developing regions through trade. However, less discussed is that trade also acts as a mechanism enabling wealthy consumers to shift Water Quantity and quality stress to their trading partners. In this study we investigate how Shanghai, the largest mega-city in China, draws Water resources from all over China and outsources its pollution through virtual Quantity and quality Water flows associated with trade. The results show that Shanghai's consumption of goods and services in 2007 led to 11.6 billion m3 of freshWater consumption, 796 thousand tons of COD, and 16.2 thousand tons of NH3-N in discharged wasteWater. Of this, 79% of freshWater consumption, 82.9% of COD and 82.5% of NH3-N occurred in other Chinese Provinces which provide goods and services to Shanghai. Thirteen Provinces with severe and extreme Water Quantity stress accounted for 60% of net virtual Water import to Shanghai, while 19 Provinces experiencing Water quality stress endured 79% of net COD outsourcing and 75.5% of net NH3-N outsourcing from Shanghai. In accordance with the three ‘redlines' recently put forward by the Chinese central government to control Water pollution and cap total Water use in all provinces, we suggest that Shanghai should share its responsibility for reducing Water Quantity and quality stress in its trading partners through taking measures at provincial, industrial and consumer levels. In the meantime, Shanghai needs to enhance demand side management by promoting low Water intensity consumption. This article is protected by copyright. All rights reserved.
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assessing Water scarcity by simultaneously considering environmental flow requirements Water Quantity and Water quality
Ecological Indicators, 2016Co-Authors: Hong YangAbstract:Water scarcity is a widespread problem in many parts of the world. Most previous methods of Water scarcity assessment only considered Water Quantity, and ignored Water quality. In addition, the environmental flow requirement (EFR) was commonly not explicitly considered in the assessment. In this study, we developed an approach to assess Water scarcity by considering both Water Quantity and quality, while at the same time explicitly considering EFR. We applied this Quantity–quality-EFR (QQE) approach for the Huangqihai River Basin in Inner Mongolia, China. We found that to keep the river ecosystem health at a “good” level (i.e., suitable for swimming, fishing, and aquaculture), 26% of the total blue Water resources should be allocated to meet the EFR. When such a “good” level is maintained, the Quantity- and quality-based Water scarcity indicators were 1.3 and 14.2, respectively; both were above the threshold of 1.0. The QQE Water scarcity indicator thus can be expressed as 1.3(26%)|14.2, indicating that the basin was suffering from scarcity problems related to both Water Quantity and Water quality for a given rate of EFR. The current Water consumption has resulted in degradation of the basin's river ecosystems, and the EFR cannot be met in 3 months of a year. To reverse this situation, future policies should aim to reduce Water use and pollution discharge, meet the EFR for maintaining healthy river ecosystems, and substantially improve pollution treatment.
Benjamin K Wu - One of the best experts on this subject based on the ideXlab platform.
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a coupled Water Quantity quality model for Water allocation analysis
Water Resources Management, 2010Co-Authors: Wanshun Zhang, Yan Wang, Hong Peng, Yiting Li, Jushan Tang, Benjamin K WuAbstract:As the demand for Water continuously increases with population growth and economic development, the gap between Water supply and demand in China has become increasingly wide. In recent years worsening Water pollution has caused this gap to become much more serious. Conventional allocation pattern, which mainly considers Water Quantity as the key factor, is no longer satisfying the Water allocation need. A coupled Water Quantity–quality model in a river basin is presented in this paper to provide a tool for Water allocation schemes analysis. The pollutants transport and hydrological cycling processes in a river basin are involved in the model. A river network is divided into different reaches. According to the division of river network, the areas out of the river are divided into a series of tanks. In each tank, hydrologic processes, pollutant loading production, Water demand of users and Water supply are calculated. In river network, hydrodynamics processes and Water quality are simulated. Water Quantity and quality exchanges between each tank and river are also considered. The time step of Water quality calculation is 24 h, the same with that of Water Quantity calculation. In each time step period, the connections of river reaches and tanks are realized through the exchange of Water Quantity and quality between rivers and tanks: pollutants discharge from tanks to rivers and Water intake from rivers to satisfy Water demand in tanks. The Water use in each tank includes three types: domestic, industrial and agricultural Water use. Water allocation schemes are one of the input conditions of the model. Using the proposed model, in each tank, Water demand and deficit of different uses, in both Water Quantity and quality, can be obtained under different Water allocation schemes. According to the Water deficit, Water allocation schemes are analyzed to make proper allocation schemes. In this aspect, the proposed model can also be thought as a Water allocation model. The model is tested and applied to the Jiaojiang River basin, Zhejiang Province, China, to analyze the different Water resource allocation schemes. Copyright Springer Science+Business Media B.V. 2010
Haiao Zeng - One of the best experts on this subject based on the ideXlab platform.
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Water Quantity and quality of six lakes in the arid xinjiang region nw china
Environmental Processes, 2014Co-Authors: Jinglu Wu, Haiao ZengAbstract:Xinjiang arid region is situated in the hinterland of Asia, characterized by very low precipitation and high evaporation. Most lakes in the region have evolved naturally to salt lakes and lagoons over the long term. In recent decades, driven by continuous climate warming and human activities, the Water Quantity and quality of lakes have fluctuated frequently, which has had significant impacts on regional resources and the environment. In this article, the Water Quantity and quality of six lakes, from saline to fresh, were studied. They are located at different geomorphologic regions (e.g., mountains and plains) in Xinjiang, China. Mountain Lakes Kanasi and Sailimu have expanded slightly, but their Water Quantity and quality have not changed significantly over the past decade. Oasis lakes, such as Lake Bositeng and Lake Chaiwopu, and tail-end lakes, such as Lake Wulungu and Lake Ebinur, have reduced in area, and in general, the Water has become saline. Lake changes were mainly responses to the regional climate change, although factors like human activities and basin morphological characteristics have led to individual differences in lake evolution. Changes in Water quality and Quantity are clearly linked. Where Water Quantity increased, Water became less salty and vice versa. Over the past decade, Water quality of the mountain lakes (Sailimu and Kanasi) were relatively stable, but oasis lakes (i.e., Bositeng and Chaiwopu) continue to deteriorate, whereas Water quality of the tail-end lakes (Wulungu and Ebinur) display unstable hydrochemistry.
Wanshun Zhang - One of the best experts on this subject based on the ideXlab platform.
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a coupled Water Quantity quality model for Water allocation analysis
Water Resources Management, 2010Co-Authors: Wanshun Zhang, Yan Wang, Hong Peng, Yiting Li, Jushan Tang, Benjamin K WuAbstract:As the demand for Water continuously increases with population growth and economic development, the gap between Water supply and demand in China has become increasingly wide. In recent years worsening Water pollution has caused this gap to become much more serious. Conventional allocation pattern, which mainly considers Water Quantity as the key factor, is no longer satisfying the Water allocation need. A coupled Water Quantity–quality model in a river basin is presented in this paper to provide a tool for Water allocation schemes analysis. The pollutants transport and hydrological cycling processes in a river basin are involved in the model. A river network is divided into different reaches. According to the division of river network, the areas out of the river are divided into a series of tanks. In each tank, hydrologic processes, pollutant loading production, Water demand of users and Water supply are calculated. In river network, hydrodynamics processes and Water quality are simulated. Water Quantity and quality exchanges between each tank and river are also considered. The time step of Water quality calculation is 24 h, the same with that of Water Quantity calculation. In each time step period, the connections of river reaches and tanks are realized through the exchange of Water Quantity and quality between rivers and tanks: pollutants discharge from tanks to rivers and Water intake from rivers to satisfy Water demand in tanks. The Water use in each tank includes three types: domestic, industrial and agricultural Water use. Water allocation schemes are one of the input conditions of the model. Using the proposed model, in each tank, Water demand and deficit of different uses, in both Water Quantity and quality, can be obtained under different Water allocation schemes. According to the Water deficit, Water allocation schemes are analyzed to make proper allocation schemes. In this aspect, the proposed model can also be thought as a Water allocation model. The model is tested and applied to the Jiaojiang River basin, Zhejiang Province, China, to analyze the different Water resource allocation schemes. Copyright Springer Science+Business Media B.V. 2010
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A Coupled Water Quantity–Quality Model for Water Allocation Analysis
Water Resources Management, 2009Co-Authors: Wanshun Zhang, Yan Wang, Hong Peng, Yiting Li, Jushan Tang, K. Benjamin WuAbstract:As the demand for Water continuously increases with population growth and economic development, the gap between Water supply and demand in China has become increasingly wide. In recent years worsening Water pollution has caused this gap to become much more serious. Conventional allocation pattern, which mainly considers Water Quantity as the key factor, is no longer satisfying the Water allocation need. A coupled Water Quantity–quality model in a river basin is presented in this paper to provide a tool for Water allocation schemes analysis. The pollutants transport and hydrological cycling processes in a river basin are involved in the model. A river network is divided into different reaches. According to the division of river network, the areas out of the river are divided into a series of tanks. In each tank, hydrologic processes, pollutant loading production, Water demand of users and Water supply are calculated. In river network, hydrodynamics processes and Water quality are simulated. Water Quantity and quality exchanges between each tank and river are also considered. The time step of Water quality calculation is 24 h, the same with that of Water Quantity calculation. In each time step period, the connections of river reaches and tanks are realized through the exchange of Water Quantity and quality between rivers and tanks: pollutants discharge from tanks to rivers and Water intake from rivers to satisfy Water demand in tanks. The Water use in each tank includes three types: domestic, industrial and agricultural Water use. Water allocation schemes are one of the input conditions of the model. Using the proposed model, in each tank, Water demand and deficit of different uses, in both Water Quantity and quality, can be obtained under different Water allocation schemes. According to the Water deficit, Water allocation schemes are analyzed to make proper allocation schemes. In this aspect, the proposed model can also be thought as a Water allocation model. The model is tested and applied to the Jiaojiang River basin, Zhejiang Province, China, to analyze the different Water resource allocation schemes. Copyright Springer Science+Business Media B.V. 2010
Jinglu Wu - One of the best experts on this subject based on the ideXlab platform.
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Water Quantity and quality of six lakes in the arid xinjiang region nw china
Environmental Processes, 2014Co-Authors: Jinglu Wu, Haiao ZengAbstract:Xinjiang arid region is situated in the hinterland of Asia, characterized by very low precipitation and high evaporation. Most lakes in the region have evolved naturally to salt lakes and lagoons over the long term. In recent decades, driven by continuous climate warming and human activities, the Water Quantity and quality of lakes have fluctuated frequently, which has had significant impacts on regional resources and the environment. In this article, the Water Quantity and quality of six lakes, from saline to fresh, were studied. They are located at different geomorphologic regions (e.g., mountains and plains) in Xinjiang, China. Mountain Lakes Kanasi and Sailimu have expanded slightly, but their Water Quantity and quality have not changed significantly over the past decade. Oasis lakes, such as Lake Bositeng and Lake Chaiwopu, and tail-end lakes, such as Lake Wulungu and Lake Ebinur, have reduced in area, and in general, the Water has become saline. Lake changes were mainly responses to the regional climate change, although factors like human activities and basin morphological characteristics have led to individual differences in lake evolution. Changes in Water quality and Quantity are clearly linked. Where Water Quantity increased, Water became less salty and vice versa. Over the past decade, Water quality of the mountain lakes (Sailimu and Kanasi) were relatively stable, but oasis lakes (i.e., Bositeng and Chaiwopu) continue to deteriorate, whereas Water quality of the tail-end lakes (Wulungu and Ebinur) display unstable hydrochemistry.
