CAJ | 학술논문

为有效认识流域侵蚀产沙来源,并探讨MIKE-SHE在中国黄土高原区域侵蚀产沙模拟的适用性,该研究采用分布式流域水文模型MIKE-SHE与修正的土壤侵蚀模型MUSLE耦合,对黄土高原典型小流域侵蚀产沙进行了空间分布模拟与评价.研究结果表明:流域侵蚀产沙主要来自于坡耕地和村庄、厂矿及居民用地,二者对于流域次降雨侵蚀产沙贡献平均为44%和34%.对于不同地貌单元,沟坡是流域侵蚀产沙的重要来源,其侵蚀产沙贡献高达68%.总体来看,73%的流域面积无明显侵蚀特征,而约17%为强度、极强度以及剧烈侵蚀区,剧烈侵蚀区多分布于沟坡和部分斜梁坡,这与现实流域植被覆被特征及侵蚀特征基本相符.沟道重力侵蚀是影响MIKE-SHE与MUSLE耦合模拟流域出口侵蚀产沙总量精度的重要因素之一.
위유효인식류역침식산사래원,병탐토MIKE-SHE재중국황토고원구역침식산사모의적괄용성,해연구채용분포식류역수문모형MIKE-SHE여수정적토양침식모형MUSLE우합,대황토고원전형소류역침식산사진행료공간분포모의여평개.연구결과표명:류역침식산사주요래자우파경지화촌장、엄광급거민용지,이자대우류역차강우침식산사공헌평균위44%화34%.대우불동지모단원,구파시류역침식산사적중요래원,기침식산사공헌고체68%.총체래간,73%적류역면적무명현침식특정,이약17%위강도、겁강도이급극렬침식구,극렬침식구다분포우구파화부분사량파,저여현실류역식피복피특정급침식특정기본상부.구도중력침식시영향MIKE-SHE여MUSLE우합모의류역출구침식산사총량정도적중요인소지일.
By making use of the runoff total and two-dimension discharge to estimate the rainfall-runoff factor of R, the coupling of MIKE-SHE with MUSLE was established, and the raster-based distribution of sediment yield for a small watershed was evaluated. It was found that both sloping field and residential area accounts for 44% and 34% of the total sediment yield, respectively. While, in terms of land forms, the gully slope contributes most of the total sediment yield, with the contribution as high as 68%. In general, it was indicated that 73% of the watershed could be classified as no rill erosion, whilst around 17% of area, especially for the area of gully slope, was of severe soil erosion rate. The identified pattern of erosion rate was generally agreed with the fact that the watershed was well vegetation covered, and the erosion on the gully slope was severe. It was suggested that, to estimate the total sediment yield of the watershed by coupling MIKE-SHE with MUSLE, it is necessary to take into account the procedure of mass erosion.