The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Takashi Asano - One of the best experts on this subject based on the ideXlab platform.
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Groundwater Recharge with reclaimed municipal wastewater: health and regulatory considerations.
Water research, 2004Co-Authors: Takashi Asano, Joseph A CotruvoAbstract:Groundwater Recharge with reclaimed municipal wastewater presents a wide spectrum of technical and health challenges that must be carefully evaluated prior to undertaking a project. This review will provide a discussion of Groundwater Recharge and its management with special reference to health and regulatory aspects of Groundwater Recharge with reclaimed municipal wastewater. At present, some uncertainties with respect to health risk considerations have limited expanding use of reclaimed municipal wastewater for Groundwater Recharge, especially when a large portion of the Groundwater contains reclaimed wastewater that may affect the domestic water supply. The proposed State of California criteria for Groundwater Recharge are discussed as an illustration of a cautious approach. In addition, a summary is provided of the methodology used in developing the World Health Organization's Guidelines for Drinking Water Quality to illustrate how numerical guideline values are generated for contaminants that may be applicable to Groundwater Recharge.
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Proposed California Regulations for Groundwater Recharge with Reclaimed Municipal Wastewater
Water Science and Technology, 1993Co-Authors: Takashi AsanoAbstract:The proposed California regulations for Groundwater Recharge with reclaimed municipal wastewater are presented with the basis and rationale for key requirements. The treatment and Recharge basin requirements have been developed to control the migration of pathogens, nitrogen, and trace organics in the extracted Groundwater. The regulations rely on a combination of controls intended to maintain a microbiologically and chemically safe Groundwater Recharge operation. These regulations provide uniform statewide criteria that will promote Groundwater Recharge projects using reclaimed municipal wastewater.
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Proposed California Regulations for Groundwater Recharge with Reclaimed Municipal Wastewater
Environmental engineering, 1991Co-Authors: Robert H. Hultquist, Richard H. Sakaji, Takashi AsanoAbstract:The proposed California regulations for Groundwater Recharge with reclaimed municipal wastewater are presented with the basis and rationale for key requirements. The treatment and Recharge basin requirements have been developed to control the migration of pathogens, nitrogen, and organics in the extracted Groundwater. These regulations provide uniform statewide criteria that will promote Groundwater Recharge projects using reclaimed municipal wastewater.
Joseph A Cotruvo - One of the best experts on this subject based on the ideXlab platform.
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Groundwater Recharge with reclaimed municipal wastewater: health and regulatory considerations.
Water research, 2004Co-Authors: Takashi Asano, Joseph A CotruvoAbstract:Groundwater Recharge with reclaimed municipal wastewater presents a wide spectrum of technical and health challenges that must be carefully evaluated prior to undertaking a project. This review will provide a discussion of Groundwater Recharge and its management with special reference to health and regulatory aspects of Groundwater Recharge with reclaimed municipal wastewater. At present, some uncertainties with respect to health risk considerations have limited expanding use of reclaimed municipal wastewater for Groundwater Recharge, especially when a large portion of the Groundwater contains reclaimed wastewater that may affect the domestic water supply. The proposed State of California criteria for Groundwater Recharge are discussed as an illustration of a cautious approach. In addition, a summary is provided of the methodology used in developing the World Health Organization's Guidelines for Drinking Water Quality to illustrate how numerical guideline values are generated for contaminants that may be applicable to Groundwater Recharge.
Hao Feng - One of the best experts on this subject based on the ideXlab platform.
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deep rooted apple trees decrease Groundwater Recharge in the highland region of the loess plateau china
Science of The Total Environment, 2018Co-Authors: Zhiqiang Zhang, Hao FengAbstract:Unlike Recharge in shallow rooted ecosystems, estimating the Groundwater Recharge beneath deep rooted plants that absorb water from deep soil remains difficult. The purpose of this research is to develop an approach to estimate the Groundwater Recharge beneath deep-rooted vegetation by combining water mass balance and chloride mass balance (CMB) and to quantify how the conversion of shallow-rooted cropland to deep-rooted apple orchards changes Groundwater Recharge. The proposed Groundwater Recharge rate under deep-rooted vegetation in this study is the difference between the Groundwater Recharge rate in a cropland (obtained using CMB) and the mean annual soil water storage deficit beneath an adjacent deep-rooted vegetation. The results show that the conversion from cropland (shallow-rooted) to apple orchard (deep-rooted) decreased soil water storage by 776, 1106, and 1117mm, corresponding to 19, 20, and 26-year-old apple orchards, respectively. Groundwater Recharge beneath cropland, on average, was 58mmyr-1, which amounts to 10% of the average annual precipitation. Groundwater Recharge beneath the apple orchards were variable, but all being <3% of the average annual precipitation. The conversion of cropland to apple orchards lead to a substantial decrease in Groundwater Recharge, potentially threatening the sustainability of the land use change.
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Deep rooted apple trees decrease Groundwater Recharge in the highland region of the Loess Plateau, China.
The Science of the total environment, 2017Co-Authors: Zhiqiang Zhang, Hao FengAbstract:Unlike Recharge in shallow rooted ecosystems, estimating the Groundwater Recharge beneath deep rooted plants that absorb water from deep soil remains difficult. The purpose of this research is to develop an approach to estimate the Groundwater Recharge beneath deep-rooted vegetation by combining water mass balance and chloride mass balance (CMB) and to quantify how the conversion of shallow-rooted cropland to deep-rooted apple orchards changes Groundwater Recharge. The proposed Groundwater Recharge rate under deep-rooted vegetation in this study is the difference between the Groundwater Recharge rate in a cropland (obtained using CMB) and the mean annual soil water storage deficit beneath an adjacent deep-rooted vegetation. The results show that the conversion from cropland (shallow-rooted) to apple orchard (deep-rooted) decreased soil water storage by 776, 1106, and 1117mm, corresponding to 19, 20, and 26-year-old apple orchards, respectively. Groundwater Recharge beneath cropland, on average, was 58mmyr-1, which amounts to 10% of the average annual precipitation. Groundwater Recharge beneath the apple orchards were variable, but all being
Laura Benegas - One of the best experts on this subject based on the ideXlab platform.
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intermediate tree cover can maximize Groundwater Recharge in the seasonally dry tropics
Scientific Reports, 2016Co-Authors: Ulrik Ilstedt, Bargues A Tobella, H R Bazie, Jules Bayala, E Verbeeten, Gert Nyberg, J Sanou, Laura BenegasAbstract:Water scarcity contributes to the poverty of around one-third of the world's people. Despite many benefits, tree planting in dry regions is often discouraged by concerns that trees reduce water availability. Yet relevant studies from the tropics are scarce, and the impacts of intermediate tree cover remain unexplored. We developed and tested an optimum tree cover theory in which Groundwater Recharge is maximized at an intermediate tree density. Below this optimal tree density the benefits from any additional trees on water percolation exceed their extra water use, leading to increased Groundwater Recharge, while above the optimum the opposite occurs. Our results, based on Groundwater budgets calibrated with measurements of drainage and transpiration in a cultivated woodland in West Africa, demonstrate that Groundwater Recharge was maximised at intermediate tree densities. In contrast to the prevailing view, we therefore find that moderate tree cover can increase Groundwater Recharge, and that tree planting and various tree management options can improve Groundwater resources. We evaluate the necessary conditions for these results to hold and suggest that they are likely to be common in the seasonally dry tropics, offering potential for widespread tree establishment and increased benefits for hundreds of millions of people.
Zhiqiang Zhang - One of the best experts on this subject based on the ideXlab platform.
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deep rooted apple trees decrease Groundwater Recharge in the highland region of the loess plateau china
Science of The Total Environment, 2018Co-Authors: Zhiqiang Zhang, Hao FengAbstract:Unlike Recharge in shallow rooted ecosystems, estimating the Groundwater Recharge beneath deep rooted plants that absorb water from deep soil remains difficult. The purpose of this research is to develop an approach to estimate the Groundwater Recharge beneath deep-rooted vegetation by combining water mass balance and chloride mass balance (CMB) and to quantify how the conversion of shallow-rooted cropland to deep-rooted apple orchards changes Groundwater Recharge. The proposed Groundwater Recharge rate under deep-rooted vegetation in this study is the difference between the Groundwater Recharge rate in a cropland (obtained using CMB) and the mean annual soil water storage deficit beneath an adjacent deep-rooted vegetation. The results show that the conversion from cropland (shallow-rooted) to apple orchard (deep-rooted) decreased soil water storage by 776, 1106, and 1117mm, corresponding to 19, 20, and 26-year-old apple orchards, respectively. Groundwater Recharge beneath cropland, on average, was 58mmyr-1, which amounts to 10% of the average annual precipitation. Groundwater Recharge beneath the apple orchards were variable, but all being <3% of the average annual precipitation. The conversion of cropland to apple orchards lead to a substantial decrease in Groundwater Recharge, potentially threatening the sustainability of the land use change.
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Deep rooted apple trees decrease Groundwater Recharge in the highland region of the Loess Plateau, China.
The Science of the total environment, 2017Co-Authors: Zhiqiang Zhang, Hao FengAbstract:Unlike Recharge in shallow rooted ecosystems, estimating the Groundwater Recharge beneath deep rooted plants that absorb water from deep soil remains difficult. The purpose of this research is to develop an approach to estimate the Groundwater Recharge beneath deep-rooted vegetation by combining water mass balance and chloride mass balance (CMB) and to quantify how the conversion of shallow-rooted cropland to deep-rooted apple orchards changes Groundwater Recharge. The proposed Groundwater Recharge rate under deep-rooted vegetation in this study is the difference between the Groundwater Recharge rate in a cropland (obtained using CMB) and the mean annual soil water storage deficit beneath an adjacent deep-rooted vegetation. The results show that the conversion from cropland (shallow-rooted) to apple orchard (deep-rooted) decreased soil water storage by 776, 1106, and 1117mm, corresponding to 19, 20, and 26-year-old apple orchards, respectively. Groundwater Recharge beneath cropland, on average, was 58mmyr-1, which amounts to 10% of the average annual precipitation. Groundwater Recharge beneath the apple orchards were variable, but all being
