CAJ | 학술논문

利用卫星遥感地形资料进行水文分析是近些年来水文研究领域的一个热点。本文选取川西南彝族自治州区域的数字高程模型DEM数据进行河网的计算提取，经过与川西南彝族自治州的标准河流水系对照，认为基于DEM提取的川西南彝族自治州的河网信息比较合理，能够作为更进一步水文研究的基础信息。分析了川西南彝族自治地区在30×30 m和90×90 m分辨率下的河网，按照梯状分布的阈值进行河网的提取，选取最佳河网后再进行不同地区最佳河网提取时阈值的横向对比，最终得出的结论是提取出来的河网密度随着阈值的增加而减少，并且在下限100和上限50000时基本达到临界值。
이용위성요감지형자료진행수문분석시근사년래수문연구영역적일개열점。본문선취천서남이족자치주구역적수자고정모형DEM수거진행하망적계산제취，경과여천서남이족자치주적표준하류수계대조，인위기우DEM제취적천서남이족자치주적하망신식비교합리，능구작위경진일보수문연구적기출신식。분석료천서남이족자치지구재30×30 m화90×90 m분변솔하적하망，안조제상분포적역치진행하망적제취，선취최가하망후재진행불동지구최가하망제취시역치적횡향대비，최종득출적결론시제취출래적하망밀도수착역치적증가이감소，병차재하한100화상한50000시기본체도림계치。
Hydrologic analysis based on the data of remote sensing is a hot topic in the field of hydrology research in recent years .This article extracts the river network based on DEM in southwest area of western Sichuan Yi nationality autonomous region .Through comparing the system with standard river system , it showed that the method is reasonable and the result can be used as the basic information of hydrology re -search.It analyzed the river network under resolution of both 30 m ×30 m and 90 m ×90m DEM data, and abstracted river network according to threshold value of ladder distribution .The best river network was extracted.Finally it got the conclusion that extracted density of water network decreased with the increase of threshold and reached the critical value at lower limit 100 and upper limit 50000 .