Relationship between Water Surface Area of Qingtu Lake and Ecological Water Delivery: A Case Study in Northwest China

Qingtu Lake is located between Tengger Desert and Badain Jilin Desert, Gansu Province, Northwest China. It the terminal lake of Shiyang River. In recent years, has maintained a certain area water surface vegetation by artificial conveyance. great significance in preventing convergence two deserts restraining trend ecological deterioration River Basin. The relationship conveyance have not been thoroughly investigated. This study analyzed spatial temporal distribution surrounding reeds interpreting remote sensing data; change under influence meteorological factors linear regression; to maintain current balance method, as well reasonable delivery high flow year, normal year low means analyzing upstream inflow consumption Minqin results showed that there significant correlation Lake, evaporation conveyance, minimum maximum areas generally appear before after delivery, indicating are main affecting Lake. result calculated regression indicated volume 3.146 × 107 m3/yr, while value was 3.136 m3/yr method. These similar can be verified with each other. Reasonable years were 4 3.2 2.3 respectively.