论文部分内容阅读
西汉水位于秦岭南坡 ,其上游有 2 350km2 的黄土区 ,为嘉陵江流域重点产沙区。自 2 0世纪 80年代末“长治”工程实施以来 ,西汉水流域重点产沙区进行了大规模的水土保持治理措施 ,至 1 996年 ,累积治理面积占水土流失总面积的 4 0 % ,水保措施对控制流域内水土流失现象起到了积极作用。以流域上游控制站顺利峡站为分析重点 ,以实测水沙资料为依据 ,采用水文学方法 ,着重研究西汉水上游天然情况下降雨径流和降雨输沙经验模型 ,并在此基础上对区内水保措施实施以来的水沙变化进行研究。
The Western Han River is located on the southern slope of Qinling Mountain, with 2,350 km2 of loess area upstream, which is the key sediment producing area in the Jialing River Basin. Since the implementation of the “Changzhi” project in the late 1980s, a large-scale water and soil conservation measures have been implemented in the key sediment producing areas of the Western Han River Basin. By 1996, the accumulated area under control accounted for 40% of the total area of water and soil loss. Water Insurance measures have played a positive role in controlling soil erosion in the basin. Based on the measured water and sediment data, taking Shunlixia Station as the control center of the upper reaches of the river basin as an example, empirical models of rainfall runoff and sediment transport under natural conditions in the upper reaches of the Western Han Dynasty are studied using hydrological methods. Based on this, Water and sediment changes since the implementation of water conservation measures were studied.