Assessment of traditional rainwater harvesting system in barren lands of a semi-arid region: A case study of Rajasthan (India)
Assessment of traditional rainwater harvesting system in barren lands of a semi-arid region: A case study of Rajasthan (India)
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半干旱地区贫瘠土地传统雨水收集系统的评估：以拉贾斯坦邦（印度）为例
DOI：
10.1016/j.ejrh.2022.101149
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发表时间：
2022
期刊：
影响因子：
4.6
通讯作者：
Yadav B
中科院分区：
文献类型：
--
作者：
Yadav B
研究地区 印度拉贾斯坦邦杜杜站 研究重点 雨水收集可用作补给含水层的方法。这可以通过各种规模和技术来实现。其中一个例子是浅渗池（Chaukas），它可以补充地下水并增加土壤湿度，促进牧场开发。 HYDRUS-1D 模型用于估计潜在的地下水补给量。该模型使用 2019 年的现场数据进行校准，并使用 2020 年的数据进行验证。标准化差异植被指数 (NDVI) 的时间序列是在年度范围内得出的，以评估植被覆盖的变化。对该地区的新水文见解该模型显示，另外 5% 的降雨深度正在被补给到地下水中。此外，额外的土壤湿度使天然草覆盖得以发展，当地社区可以将其用作牧场。当地社区正在实现的这双重好处可以扩大到杜杜以外的地区、印度乃至全世界，因为许多地区都有略微倾斜的贫瘠土地，加上渗透性土壤，这是建设 Chaukas 的唯一条件。这些 Chauka 系统有助于这些缺水地区的可持续水资源管理，并通过开发畜牧业牧场提供额外的生计支持。
Study regionDudu station, Rajasthan, IndiaStudy focusRainwater harvesting can be used as a method to recharge aquifers. This can happen with a variety of scales and technologies. One such example is shallow infiltration ponds (Chaukas) which recharge groundwater and increase soil moisture facilitating pastureland development. A HYDRUS-1D model was used to estimate potential groundwater recharge. The model was calibrated using field data from 2019 and validated using data from 2020. The time series of Normalized Difference Vegetation Index (NDVI) was derived at annual scale to assess changes in the vegetation cover.New hydrological insights for the regionThe modeling revealed that an additional 5% of the rainfall depth was being recharged into the groundwater. In addition, the additional soil moisture was allowing natural grass cover to develop, which could be used by the local community as pastureland. These twin benefits that the local communities are realizing could be scaled up beyond Dudu, to India, and worldwide, as many regions have barren land that is slightly sloping, together with permeable soils, which are the only conditions for the construction ofChaukas. TheseChaukasystems have helped in sustainable water resources management in these water-stressed regions and the additional livelihood support through developed pastures for animal husbandry.