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首页> 外文期刊>Australian journal of water resources >Quantifying The Impacts Of Rainwater Harvesting In A Case Study Catchment: The Arvari River, Rajasthan, India
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Quantifying The Impacts Of Rainwater Harvesting In A Case Study Catchment: The Arvari River, Rajasthan, India

机译：在案例研究流域中量化雨水收集的影响：印度拉贾斯坦邦的阿瓦里河

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Rainwater harvesting (RWH) is the collection and storage of runoff for the primary purpose of groundwater recharge in arid and semi-arid regions of India. In India, investment in RWH for groundwater recharge is increasing. However, despite this very little is known on the catchment hydrological impacts of RWH. Although RWH is a small-scale operation, when implemented across a catchment, the impact on groundwater and river flow could be significant. However, there is currently no study that has comprehensively quantified this impact. This paper therefore proposes a method to explore the effects of RWH in a case study catchment of the 500 km~2 ungauged Arvari River Basin in Rajasthan, India, where 366 RWH structures have been built since 1985. Difficulties associated with working in semi-arid regions, such as this catchment, include the high spatial and temporal variability of climate, particularly rainfall, and landscape conditions and data scarcity. Detailed field studies of local scale effects of RWH and recharge under a number of structures were studied during the monsoon of 2007 in the catchment. Discharge over anicuts on the river was also monitored and subsequent water level rise in wells. These results will be extended to the catchment scale using a conceptual catchment water balance model that captures the main hydrological processes. Water moves through the catchment in a series of linked storages for each land use, where the upper and lower catchments are separate domains. The groundwater system consists of an unconfined alluvial aquifer over a confined hard rock aquifer. This will allow different scenarios of land use and levels of RWH to be explored to quantify the hydrological impact on the catchment.
机译：雨水收集（RWH）是收集和储存径流的主要目的，目的是在印度的干旱和半干旱地区补充地下水。在印度，对RWH进行地下水补给的投资正在增加。但是，尽管对RWH的流域水文影响知之甚少。尽管RWH是一个小规模的作业，但如果在一个流域实施，则对地下水和河流流量的影响可能很大。但是，目前尚无研究对这种影响进行全面的量化。因此，本文提出了一种方法，用于在印度拉贾斯坦邦500 km〜2未开封的Arvari流域的案例研究流域中研究RWH的影响，该流域自1985年以来已建造366处RWH结构。与半干旱工作有关的困难该集水区等区域包括气候的高度时空变化，特别是降雨，以及景观条件和数据稀缺。在2007年季风流域，研究了在许多结构下RWH和补给的局部尺度效应的详细现场研究。还监测了河道上anicuts的排放，随后水井中的水位上升。这些结果将使用一个概念性的集水量水平衡模型扩展到集水规模，该模型可以捕获主要的水文过程。每种土地用途中，水流经一系列相关存储的集水区，上，下集水区是独立的区域。地下水系统由密闭硬岩石含水层上的无限制冲积含水层组成。这将允许探索土地利用和RWH水平的不同方案，以量化水文对流域的影响。

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