Division, Naming, and Spatial Distribution Characteristics of Small Watersheds in Mixed Terrains:A Case Study of Yingwen River Basin

• Published in: Yuan bao Vol. 42; no. 5; pp. 1 - 9
• Main Author: CHEN Fei-yong, CHEN Qian-xun, JIANG Qian-qian, MA Shu-juan, XU Jing-tao, REN Guang-xin, CHENG Xiao-xiang, WANG Jin
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Journal of Changjiang River Scientific Research Institute 01.05.2025
• Subjects: small watershed|mixed terrain|spatial distribution characteristics|yingwen river
• ISSN: 1001-5485
• DOI: 10.11988/ckyyb.20240290

[Objective] Focusing on the Yingwen River Basin in Shandong Province, this study aims to explore the extraction, division, naming methods for small watersheds in mixed terrains, and to analyze spatial distribution characteristics of small watershed areas and river network densities. [Methods] This study utilized high-precision SRTM-DEM data, combined with hydrological analysis modules, to extract micro-watersheds, river networks, and watershed boundaries. The optimal catchment threshold was determined using the river network density method. Micro-watersheds were merged into small watershed units based on natural catchment relationships, and named according to Specification SL 653—2013. In complex terrain areas, local corrections were made by referencing high-resolution remote sensing images and field survey results to ensure the accuracy of the division. Meanwhile, the main stream, first-order tributaries, and second-order tributaries of the Yingwen River Basin were extracted, and the characteristics such as