基于RS和GIS的磨盘山水库面积提取方法研究

Study on the extraction methods of reservoir surface area of Mopanshan reservoir based on RS and GIS

本文基于遥感水体指数法和矢量化方法,以磨盘山水库Landsat8OLI遥感数据为基础资料,定量获取水库水域面积,并探究各个提取方法的优势与不足。结果表明:矢量化法获取的面积相对误差率最小,仅为0.072%,遥感水体指数的相对误差较大;遥感水体指数法具有快速、简捷、精准和效率高等优势,MNDWI法计算结果最佳,MNDWI和NDWI法相对误差分别为1.32%和4.21%;MNDWI法提取的水体信息能够满足水库水体监测与应急监测需求。

Based on the methods of remote sensing water index and the vectorization,the water area of Mopanshan reservoir was obtained by using the Landsat OLI remote sensing data which was taken as the major data,meanwhile,the advantages and disadvantages of different methods for water extraction method were explored.The results showed that the relative error rate of area obtained by vectorization was the least,which only was 0.072%,on the contrary,the relative error of the remote sensing water index was larger,however,the method of remote sensing water index has the advantages was fast,simple,accurate and efficient,while the MNDWI method was the best,the relative error of MNDWI and NDWI method was 1.32%and 4.21%respectively,meanwhile,the water information extracted by MNDWI method can meet the needs of reservoir water monitoring and emergency monitoring.