陕西省重点产业创新链项目“黄河流域(陕西段)河湖生态安全遥感监测与预警关键技术研究”(2022ZDLSF06-09)； 国家重点研发计划项目“空间辐射基准传递定标及地基验证技术”(2018YFB0504800)； 咸阳市重大科技专项计划项目“东庄水库区域生态环境变化与种植布局调整气象分析研究”(2020k01-33)
[目的] 对陕西省东庄水库流域生态环境开展实时准确的监测，为流域开发与保护、城镇经济发展提供数据和理论支撑。[方法] 选取2000,2010,2020年Landsat遥感影像，基于谷歌地球引擎(GEE)平台构建湿度、绿度、干度、热度4个指标，通过主成分分析法计算遥感生态指数，对东庄水库流域20 a间生态环境变化进行监测与评价，基于IDRISI软件的CA-Markov模型对2030年东庄水库流域生态环境情况进行模拟。[结果] ①20 a间东庄水库流域生态环境整体维持在一个水平，RSEI均值由0.499上升到0.500，生态环境状况略微有上升； ②从RSEI各等级变化来看，20 a间东庄水库流域生态环境状况较为复杂，生态环境的改善与恶化长期持续并存，渭北地区1999年以来实施的退耕还林政策对流域生态环境改善起到正向作用，且效用开始凸显。[结论] 东庄水库生态环境恶化的区域主要集中在城镇及其周边区域，改善的区域主要集中在林区和丘陵地区。今后仍需继续关注经济高速发展与生态环境治理二者间的平衡问题。
[Objective] Real-time and accurate monitoring of the ecological environment of the Dongzhuang reservoir basin in Shaanxi Province was carried out to provide data and theoretical support for the development and protection of the watershed and urban economic development. [Methods] Landsat remote sensing images in 2000, 2010, and 2020 were selected, and four indexes (humidity, greenness, dryness, and heat) were constructed based on the Google Earth Gngine (GEE) platform. The remote sensing ecological index (RSEI) was calculated by the principal component analysis method, and the ecological environment changes in the Dongzhuang reservoir basin over the past 20 years were monitored and evaluated. The CA-Markov model based on IDRISI software was used to simulate the ecological environment of the Dongzhuang reservoir basin in 2030. [Results] ① During the past 20 years, the ecological environment of the Dongzhuang reservoir basin has been maintained at the same level, and average RSEI increased from 0.499 to 0.500, indicating a slight increase in the ecological environment. ② According to changes in RSEI values, the ecological environment of the Dongzhuang reservoir basin over the past 20 years was relatively complex, and both improvement and deterioration of the ecological environment continued to coexist for a long time. The policy of returning farmland to forest instituted in 1999 in the Weibei region played a positive role in the improvement of the ecological environment, and its effect has begun to be prominent. [Conclusion] The ecological environment of the Dongzhuang reservoir basin has deteriorated mainly in the towns and their surrounding areas, while the improved areas have mainly occurred in the forest and hilly areas. It is still necessary to give more attention to the balance between rapid economic development and ecological environment management.