Isolating the impacts of anthropogenic water use within the hydrological regime of north India
Isolating the impacts of anthropogenic water use within the hydrological regime of north India
复制标题
隔离印度北部水文状况内人为用水的影响
DOI：
10.1002/esp.4799
复制
发表时间：
2020
影响因子：
3.3
通讯作者：
O'Keeffe J
中科院分区：
文献类型：
--
作者：
O'Keeffe J
人类用水的影响在决定印度北部的水文循环方面发挥着重要作用。本文通过在CHANSE（耦合人类与自然系统环境）社会水文模型框架中明确纳入观察到的人类用水行为、灌溉基础设施和自然环境，探讨了该地区水文制度中的人为影响。该模型受到在研究区域收集的观测定性和定量信息的约束，沿着来自其他来源的气候和社会经济变量。使用了四种不同的情景，包括一切照旧（BAU，代表观察到的灌溉做法）、仅地下水灌溉（消除运河网络的影响）、仅运河灌溉（所有灌溉水由转移的地表水提供）和仅灌溉（消除所有人为干预）。在一切照旧的条件下，建模框架与观测到的地下水位密切匹配。随着运河网络的拆除，农民被迫完全依赖地下水灌溉，水位下降，而在只有运河的情况下，洪水发生了。在仅限地下水位的情况下，观察到的地下水位与目前的正常情况相似，尽管在BAU实践中进出系统的补给和排放量要大得多。虽然抽取地下水本身可能导致含水层枯竭，但地表水和地下水资源的联合使用，包括运河渗漏的意外贡献，造成了类似于没有人为干预的情况。在这里，适当的水管理做法的重要性，在保持可持续的水资源，显示。这可能包括通过有管理的含水层补给来增加地下水资源，并通过在可能的情况下偶尔使用运河水来减少对含水层资源的影响。展示了强调环境影响和人类福祉之间权衡的最佳水管理实践的重要性，为政策制定者、水管理者和用户提供了有用的信息。© 2019约翰威利父子有限公司
The effects of anthropogenic water use play a significant role in determining the hydrological cycle of north India. This paper explores anthropogenic impacts within the region's hydrological regime by explicitly including observed human water use behaviour, irrigation infrastructure and the natural environment in the CHANSE (Coupled Human And Natural Systems Environment) socio‐hydrological modelling framework. The model is constrained by observed qualitative and quantitative information collected in the study area, along with climate and socio‐economic variables from additional sources. Four separate scenarios, including business as usual (BAU, representing observed irrigation practices), groundwater irrigation only (where the influence of the canal network is removed), canal irrigation only (where all irrigation water is supplied by diverted surface water) and rainfed only (where all human interventions are removed) are used. Under BAU conditions the modelling framework closely matched observed groundwater levels. Following the removal of the canal network, which forces farmers to rely completely on groundwater for irrigation, water levels decrease, while under a canal‐only scenario flooding occurs. Under the rainfed‐only scenario, groundwater levels similar to current business‐as‐usual conditions are observed, despite much larger volumes of recharge and discharge entering and leaving the system under BAU practices. While groundwater abstraction alone may lead to aquifer depletion, the conjunctive use of surface and groundwater resources, which includes unintended contributions of canal leakage, create conditions similar to those where no human interventions are present. Here, the importance of suitable water management practices, in maintaining sustainable water resources, is shown. This may include augmenting groundwater resources through managed aquifer recharge and reducing the impacts on aquifer resources through occasional canal water use where possible. The importance of optimal water management practices that highlight trade‐offs between environmental impact and human wellbeing are shown, providing useful information for policy makers, water managers and users. © 2019 John Wiley & Sons, Ltd.
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影响因子：
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作者：
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通讯作者：
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DOI：
--
发表时间：
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期刊：
影响因子：
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影响因子：
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影响因子：
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影响因子：
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