1990-2019年达里诺尔湖水体面积变化遥感监测

Remote Sensing Monitoring of Water Area Changes in Darinore Lake from 1990 to 2019

以Landsat遥感数据资料为基础,采用归一化差分水体指数(NDWI)对达里诺尔湖水体进行识别和提取,使该区域形成长时间监测,研究1990—2019年达里诺尔湖的时空变化,并通过气象数据探讨水体面积与气候变化的关系。结果表明,达里诺尔湖1990—2019年水体面积呈波浪式变化,整体呈下降趋势,自2000年后,达里诺尔湖水体面积逐渐减少,20年间共减少41.82 km^(2);在湖体东北方向减少幅度最大,共减少19.89 km^(2)。达里诺尔湖水体面积与降水量呈正相关,与气温呈负相关。

Based on Landsat remote sensing data,the normalized differential water index(NDWI)was used to identify and extract the water body of Dalinore,so that the area could be monitored for a long time,the temporal and spatial changes of Dalinore Lake from 1990 to 2019 were studied,and the relationship between water area and climate change through meteorological data were explored.The results showed that from 1990 to 2019,the water area of Dalinore Lake showed a wave-like change,with an overall downward trend.Since 2000,the water area of Dalinor Lake had gradually decreased,with a total decrease of 41.82 km^(2)in 20 years.The largest decrease was in the northeast of the lake,with a total decrease of 19.89 km^(2).The water area of Dalinore Lake was positively correlated with precipitation,and negatively correlated with temperature.