1989-2020年达里诺尔湖泊面积变化遥感监测

Remote sensing monitoring of the area change of Dalinor Lake from 1989 to 2020

针对干旱半干旱区湖泊面积持续萎缩的问题,利用归一化水体指数(normalized difference water index,NDWI)等方法,分析达里诺尔湖泊面积的变化状况及变化的驱动力因素。1989—2020年达里诺尔湖湖泊面积呈下降态势,缩减了32.34 km^(2),2000—2010年湖泊面积缩减幅度最大。研究表明,达里诺尔湖泊面积缩减的主要自然因素为多年来气温升高导致的蒸发量增大,以及降水量波动幅度较大,入湖水量不断减少,主要人为因素为耕地面积、牲畜存栏量增长以及工农业生产总值的快速增加,致使水资源消耗急剧增长和生态植被受到严重破坏,生态质量逐渐恶化。

Aiming at the problem of the continuous shrinking of lake area in arid and semi-arid regions,using normalized difference water index(NDWI)and other methods to analyze the changes in the area of Dalinor lake and the driving factors of the change.During 1989 to 2020,the lake area of Dalinor Lake showed a downward trend,with a reduction of 32.34 km^(2),and the largest reduction in lake area was from 2000 to 2010.The study showed that the main natural factor for the decrease in the area of Dalinor Lake was the increase in temperature over the years.The resulting increase in evaporation,the large fluctuations in precipitation,and the continuous decrease in the amount of water entering the lake,the main human factors were the increase in the area of arable land,the increase in livestock inventory,and the rapid increase in the total value of industrial and agricultural production,resulting in a sharp increase in water consumption and ecological The vegetation has been severely damaged,and the ecological quality has gradually deteriorated.