基于LEGOS HYDROWEB的青藏高原湖泊群水位和面积动态变化分析

湖泊面积和水位的变化客观地反映了区域水资源的时空变化过程。利用LEGOS HYDROWEB提供的湖泊信息数据,对青藏高原1993~2014年21年间63个典型湖泊的水位变化,以及其中59个湖泊的面积变化趋势进行分析。根据变化趋势将湖泊分为增长型、稳定型和衰退型;并在这三种类型的湖泊中分别选取两个典型湖泊进行回归分析。结果表明:63个湖泊中水位增长型湖泊42个,稳定型湖泊12个,衰退型9个;59个湖泊中面积增长型湖泊32个,稳定型19个,衰退型8个。对于增长型湖泊而言,水位和面积增长最大是Ziling湖,分别增长了10.90 m和361.72 km~2;衰退型湖泊中水位和面积衰退趋势最大的是Yamzho-yumco湖,分别减少了2.29 m和28.65 km2。高原内陆水体的水位和面积的动态变化对研究气候演变和地表水资源的影响具有重要意义。

Dynamic Analysis of Water Level and Area of Qinghai-Tibet Plateau Group Lakes Based on LEGOS HYDROWEB

The change of lake area and water level objectively reflect the process of spatial and temporal variations of regional water resources. This paper use LEGOS HYDROWEB lakes information data of Qinghai-Tibet Plateau between 1993-2014, a group of 63 typical lakes water level change and the 59 lakes area change tendency were analyzed, then according to the change trend of the lake is divided into growth, stability and recession, in which the three types of lakes two typical lakes were selected for regression analysis. Results show that 63 lakes in the lake water level growth was 42, stable lakes was 12, recession type was 9; 59 lakes area of growth was 32, stable was 19, recession type was 8. For the growth type of lakes, water level and area of lake largest growth is Ziling lake, which increased by 10.90 m and 361.72 km2 respectively, in recession type lakes water level and area of the largest decline is Yamzho-yumco lake, which decreased by 2.29 m and 2.29 km2 respectively. Dynamic change of water level and area in plateau inland bodies had great significance to study the influence of climate change and surface water resources.