Page 26 - 2021年第52卷第8期

Land use change and its impact on groundwater in the typical district
of Sanjiang Plain during the past 40 years

1，2 1，2 3
SHU Longcang ，WANG Zhe ，YUAN Yajie ，
3
3
ZHANG Fenghai ，LIU Wu ，LU Chengpeng 1，2
（1. College of Hydrology and Water Resources，Hohai University，Nanjing 210098，China；
2. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering，Hohai University，Nanjing 210098，China；
3. Heilongjiang Monitoring Center of Hydrology and Water Resources，Harbin 150001，China）

Abstract： Sanjiang Plain is an important commodity grain base and grain strategic reserve base in China.
Groundwater is the main irrigation water source in this region，and its dynamic has been paid much atten⁃
tion. The characteristics of land use change were analyzed by using remote sensing image data from typical
areas of Sanjiang Plain in 1980， 1990， 2000， 2010 and 2018. The effects of land use type change on
depth to water table，the impact of urbanization process and arable land area change on water balance was
explored. The results show that there are significant fractal characteristics in the area and periphery of pad⁃
dy field and urban land，and the stability index is from strong to weak to strong during the past 40 years.
The gravity center of the two land use types has shifted significantly in the past 40 years， and the direc⁃
tion of the transfer is mainly from southwest to northeast to southwest，which directly affects the water bal⁃
ance state of the study area. The change of land use type causes the slow recovery of groundwater recharge
in some areas and causes the increase of depth to water table in different degrees. Urbanization develop⁃
ment has a relatively small effect on precipitation infiltration recharge， while the change of cultivated land
area has a significant effect on irrigation regressive recharge. The research results can provide a scientific
basis for the construction of a more accurate groundwater numerical model in the typical district of Sanji⁃
ang Plain， and provide a theoretical reference for the sustainable development and utilization of groundwa⁃
ter in the Sanjiang Plain.
Keywords：remote-sensing image；land use/cover change；depth to water table；urbanization；water balance
（责任编辑：耿庆斋）

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