无资料地区闸站调度下江湖水量交互规律研究

Study on Interaction Rule of River and Lake Water Quantity Under Sluice Station Dispatching in Ungauged Region

为解决无资料地区通江湖泊水量交互规律,以涨渡湖为例,将江湖水量交互原理同遥感解译理论相耦合,提出一种无资料地区闸站调度下江湖水量交互规律研究方法,基于Google Earth Engine(GEE)平台分析湖泊面积变化,结合同期降水、蒸发和湖泊特性,计算江湖交互水量。结果表明,湖泊多年月平均面积总体变化趋势一致,呈规律性变化,2~6月呈下降趋势,7~11月呈上升趋势,变化范围在40~47 km^(2)之间;每年2~6、11~12月湖水入江,7~10月、12月~次年1月江水倒灌入湖。结果可为其他无资料地区闸站调度下江湖水量交互规律研究提供参考。

The theory of remote sensing interpretation is combined with the principle of water quantity interaction between rivers and lakes, and a novel method for examining the regularity of water quantity interaction between rivers and lakes under the dispatching of gate stations in an ungauged region is proposed. By combining the features of precipitation, evaporation, and lakes in the same period, the Google Earth Engine(GEE) platform is used to study the change of lake area and calculate the interaction water amount between rivers and lakes. The results show that the yearly and monthly average lake area have the same general pattern and consistent fluctuations. With a range of 40-47 km^(2), it exhibits a declining tendency from February to June and an ascending trend from July to November. Every year, from February to June and from November to December, lake water enters the river. The river's water enters the lake from July to October and from December to January of the following year. This approach can serve as a guide for the investigation of the routine interactions between river and lake water levels under the dispatching of gate stations in various unmeasured environments.