基于多源数据的山前水系提取实验:以济南市及邻区为例  

Experiment of Piedmont Water System Extraction Based on Multi-source Data:A Case Study of Jinan City and Its Adjacent Areas

作　　者：王泽利 许洪泰 肖泽后 倪永进 WANG Ze-li;XU Hong-tai;XIAO Ze-hou;NI Yong-jin(College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao 266400,China;Shandong Institute of Earthquake Engineering,Jinan 250000,China)

机构地区：[1]山东科技大学地球科学与工程学院,青岛266400 [2]山东省地震工程研究院,济南250000

出　　处：《科学技术与工程》2023年第32期13688-13700,共13页Science Technology and Engineering

基　　金：山东省防震减灾“十三五”规划项目(SD135-2-3)。

摘　　要：河流水系的准确提取是研究构造地貌与水文地质的一项重要基础工作。以济南及邻区作为研究区,以SRTMDEM(shuttle radar topography mission digital elevation model)90 m分辨率原始高程数据和Landsat 8 OLI_TIRS卫星影像作为源数据,通过对比不同方法[数字高程模型(digital elevation model,DEM)、归一化差异水体指数(normalized difference water index,NDWI)、改进的归一化差异水体指数(modified normalized difference water index,MNDWI)]的特点及在各地貌区的应用效果,尝试了一种能够自动提取上述地区水系的方法。结果表明:在区内的山地丘陵区和平原区,所对应的最优水系提取方法分别为基于DEM和MNDWI的提取方法,二分区的分界线可通过地形起伏度进行确定。通过对比研究区的断层和水系分布,认为研究区内的早中更新世断裂对河流造成的影响已经衰减,并且河流已达到了新的平衡状态。The accurate extraction of river system is an important basic work in the study of tectonic geomorphology and hydrogeology.Jinan and its adjacent areas were taken as the research area,and the original elevation data with 90 m resolution of shuttle radar topography mission digital elevation model(SRTMDEM)and Landsat 8 OLI_TIRS satellite image were taken as the source data.By comparing the characteristics of digital elevation model(DEM),normalized difference water body index(NDWI)and improved the normalized difference water body index(MNDWI)and their application effects in various geomorphic areas,a method that can automatically extract the water system in the above areas is tried.The results show that the optimal drainage extraction methods are based on DEM and MNDWI respectively for mountainous hilly area and plain area in the region,and the dividing line of the two areas can be determined by relief degree.By comparing the distribution of faults and drainage systems in the study area,it is concluded that the influence of earlier than the early and middle Pleistocene faults on the river has attenuated and the river has reached a new equilibrium state.

关 键 词：水系提取 地貌分区 山前地带 构造地貌 数字高程模型(DEM) 改进归一化差异水体指数(MNDWI) 

分 类 号：P512[天文地球—地质学]