基于面积?高程积分的他念他翁山玉曲流域地貌学分析

以他念他翁山玉曲流域为研究区，利用ArcGIS中的水文分析工具，将玉曲流域划分为1 030个亚流域盆地，采用高程起伏比法，对亚流域盆地进行面积?高程积分值（HI）计算。结合研究区的构造运动、岩性、地形起伏度、冰川作用等，探讨HI值的分布特征及主要影响因素，并确定研究区的地貌演化阶段。研究结果显示：① 玉曲流域所有亚流域盆地的HI值介于0.18~0.70，HI平均值为0.44，整体处于侵蚀循环的壮年和老年阶段。② 长毛岭大断层和瓦合大断裂经过玉曲流域，2条断裂的HI平均值分别为0.47和0.42，长毛岭大断层的活动性要高于瓦合大断裂，说明构造因素对HI值存在一定影响。③ 由于不同亚流域盆地内岩性抗侵蚀能力不同，导致HI值存在着较大差异，花岗岩、闪长岩等侵入岩（平均值0.55）>砾岩、灰岩等沉积岩（平均值0.49）>海相碳酸盐岩（平均值0.47）>夹杂着粉砂岩、页岩和泥岩的长石石英砂岩（平均值0.42）>第四系冲积物和冰碛物（平均值0.35）。④ 对于玉曲流域而言降水量对HI值的影响较小。

Geomorphologic Analysis of the Yuqu River Drainage basin in Tenasserim Chain Based on Hypsometric Integral Value

The area elevation analysis of the basin is usually used to reveal the stage of geomorphological development, which is of great scientific significance for exploring the evolution of the basin environment. In this paper, the Yuqu River Basin of middle Tenasserim Chain is used as the research area. Using the hydrological analysis tools in Arcgis, the Yuqu River Basin is divided into 1 030 sub-basin basins. The area-elevation integral value (HI) of sub-basin basin is calculated using the elevation fluctuation ratio method. Combined with the tectonic movement, lithology, topographic relief and glacial action in the study area, the distribution characteristics and main influencing factors of HI values are discussed, and the geomorphological evolution stage of the study area is determined. The results display that: 1) The HI value of all sub-basin basins in the Yuqu River Basin is between 0.18 and 0.70, and the average HI is 0.44. The whole is in the strong and old stage of the erosion cycle. 2) The two major faults of the Changmaoling large fault and the Wahe large fault pass through the Yuqu basin, and the average HI values of the two faults are 0.47 and 0.42, respectively. The activity of the Changmaoling fault is higher than that of the Wahe fault, indicating that the construction factor has a certain influence on the HI value. 3) Due to the different lithologic erosion resistance in different sub-basin basins, the HI values are quite different. Intrusive rocks such as granite and diorite (average 0.55)> Conglomerate, limestone and other sedimentary rocks (average 0.49)> Marine carbonate rocks (average 0.47)> Mixed with siltstone, shale, Feldspar quartz sandstone of mudstone (average 0.42)> Quaternary alluvial and glacial till (average 0.35). 4) For the Yuqu River brainage, precipitation has little influence on HI value.