Institute of Geographic Science and Natural Resource Research, Chinese Academy of Science, Beijing, China.
Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection of China, Nanjing, China.
PLoS One. 2018 Aug 22;13(8):e0201132. doi: 10.1371/journal.pone.0201132. eCollection 2018.
Global water shortage is becoming increasingly severe, so the identification and protection of potential areas for harvesting water play important roles in alleviating drought. Suitable sites for potential water harvesting require a high runoff potential. Avoiding soil erosion caused by high surface runoff, however, is also necessary. We therefore developed a procedure for the continuous accounting of runoff potential based on the Soil Conservation Service curve number and potential risks of water and soil loss based on the universal soil loss equation to evaluate the potential for water harvesting. Suitable sites for rainwater harvesting covered 24.90% of the semi-arid area of Chifeng, southeastern Inner Mongolia, China. The best areas accounted for 8.4% of the study area. The southern part of the Greater Hinggnan Mountains in northern Chifeng had a large rainwater harvesting area, and the western and eastern parts of the Chifeng area belonging to Horqin Sandy Land and Hunshandake Sandy Land, respectively, had smaller rainwater-harvesting areas. The eight reservoirs in the Xilamulun River Basin were further analyzed as an example. Derived sites investigated by ground-truth field verification indicated a method accuracy of 87.5%. This methodology could be effective in other areas with similar requirements due to the increasing demand for water resources and requirements for the protection of soil-water resources.
全球水资源短缺日益严重，因此识别和保护潜在的集水区对于缓解干旱至关重要。潜在集水区域需要具有较高的径流量。然而，还需要避免由高地表径流引起的土壤侵蚀。因此，我们开发了一种基于土壤保持服务曲线号的连续径流潜力核算程序，以及基于通用土壤流失方程的水土流失潜在风险，以评估集水潜力。中国内蒙古东南部赤峰半干旱区适合集雨的区域占 24.90%。最佳集雨区域占研究区域的 8.4%。赤峰南部的大兴安岭南段具有较大的集雨面积，而属于科尔沁沙地和浑善达克沙地的赤峰西部和东部的集雨面积较小。以锡林郭勒河流域的 8 座水库为例进一步分析。实地核查验证的地面实况调查结果表明，该方法的准确度为 87.5%。由于对水资源的需求不断增加以及对水土资源保护的要求，这种方法在其他具有类似需求的地区可能会很有效。
