Change of river system in the Lixiahe region during urbanization
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
The change of underlying surface and river system and its impact on hydrological process is one of the hot topics in hydrological studies especially in plain areas. In this study, we chose the Lixiahe district as the study area, and adopted RS and GIS technologies to study the changes in underlying surface and river system. The results showed that there was a significant change in land use during the urbanization of the study area. The proportion of urban area increased from 3.4% in 1980 to 2018% in 2014, while the area of paddy fields and water bo dy decreased1 The urban expansion evidently accelerated after 2000, and showed an eastw ard and southw ard tendency from the city center. Drainage density and water surface ratio both declined during the past 30 years. As a result , the structural complexity and the regional regulation and storage capacity of the river system also declined. The change of the river system was mainly charact erized by the reduction in low-grade rivers. Urbanization became the main driver in river system change after 2000. The degree of river system change had a significant linear relationship with urbanization in areas with an urbanization rate below 30% . The drainage density, water surface ratio, and box dimension were effective indicators of the quantitative and structural changes of the river system. The research results may enrich the case studies on river system change in plain areas, and provide basis for the funct ional planning and protection of the river system in this region in the future urbanization process.
Keywords:
Project Supported:
Clc Number:
Mobile website
® 2024 All Rights Reserved
冀公网安备13010502002656号
冀公网安备13010502002656号