Implications of Watershed Management Practices on Water Availability Using Hydrus-1D Model in the Aba Gerima Watershed, Upper Blue Nile Basin, Ethiopia
Implications of Watershed Management Practices on Water Availability Using Hydrus-1D Model in the Aba Gerima Watershed, Upper Blue Nile Basin, Ethiopia
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DOI：
10.3390/w14193095
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发表时间：
2022-10-01
期刊：
影响因子：
3.4
通讯作者：
Zeleke, Gete
中科院分区：
文献类型：
--
作者：
Fikadu, Tekuamework;Teferi, Ermias;Zeleke, Gete
这项研究的主要目的是研究流域管理(WSM)对青尼罗河上游阿巴吉里马流域水文参数的影响。利用每类试验点不同的土壤物理和水文数据，在WSM下的控制点和站点进行了Hydrus一维模型模拟，以估算水文循环的各个组成部分。用实测土壤水分数据通过反演解对结果进行了校正。因此，Hydrus 1D模型的预测结果是有效的，R-2值在0.73~0.853之间，RMSE值在0.015~0.04之间。对照林地365天的累计蒸发量比水分管理下的林地高出37.6%。水分胁迫下的表层和底层通量分别比对照高4.6%和12.5%。这可能归因于阿坝日里马实施的水资源管理措施增加了土壤水分可获得性，本研究的结果可以作为水资源管理对水资源可用性积极影响的经验证据。最后，所有流域的有关机构和发展伙伴都应加强水资源管理，特别是在水资源供应受到严重土地退化影响的地区。
The main objective of this study was to examine the implications of watershed management (WSM) on hydrological parameters in the Aba Gerima watershed in the Upper Blue Nile Basin. The Hydrus 1D model simulations were conducted in control sites and sites under WSM to estimate various components of the hydrologic cycle, using different soil physical & hydrological data under each category of experimental sites. Results were calibrated with measured soil moisture data through inverse solutions. Thus, Hydrus 1D model was found to be effective in predicting results, with R-2 values of 0.73 to 0.853 and RMSE values ranging from 0.015 to 0.04. The cumulative evaporation estimated for 365 days for control sites was 37.6% higher than that of sites under WSM. Surface and bottom fluxes in the sites under WSM were 4.6% and 12.5%, respectively, higher than the control sites. This could be attributed to the increased soil water availability resulting from the implemented WSM practices in Aba Gerima, and the results of this study can be used as empirical evidence of the positive implications of WSM on water availability. Finally, WSM should be strengthened by concerned bodies and development partners in all watersheds, especially where water availability is affected by severe land degradation.