Characteristics and Driving Forces of Spatiotemporal Changes of River-Lake-Reservoir Water System in Guangdong Province

Abstract

In order to study the historical change and development law of the river-lake-reservoir water system in Guangdong Province, the characteristics of spatiotemporal changes, landscape patterns, and land use transfer from 1980 to 2021 were analyzed, and the driving factors of the water change were analyzed by correlation coefficient. The results show that: ① From 1980 to 2021, the river area continued to shrink while the reservoir area continued to grow, and the trend of both changes changed abruptly in 1995. ② The water landscape pattern tended to be fragmented, complicated, and discrete. ③ In the past 40 years, the land use change of 50 m around the water area was mainly the transformation of rivers into reservoirs, and a large area of the river-lake-reservoir water system was transformed into urban and rural, industrial, mining, and residential lands from 1995 to 2021. ④ Annual mean temperature, permanent population density, and economic output values were the main driving factors of water area and landscape pattern change. The research results clearly define the change characteristics of the river-lake-reservoir water system in Guangdong Province and can provide a certain basis for the formulation of targeted water protection policies.

Keywords

• river-lake-reservoir water system
• spatiotemporal changes
• landscape pattern
• land use transfer
• driving forces
• Guangdong province