CAI Tian,WANG Jia.Application of Drainage Model and GIS Fuzzy Comprehensive Evaluation in Waterlogging Risk Assessment[J].China Water & Wastewater,2021,37(11 11):117-124.
Application of Drainage Model and GIS Fuzzy Comprehensive Evaluation in Waterlogging Risk Assessment
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
11 11
Page:
117-124
Column:
Date of publication:
2021-06-01
- Keywords:
- fuzzy comprehensive evaluation; GIS; drainage model; waterlogging simulation; risk assessment
- Abstract:
- Considering three risk factors of hazard, sensitivity and vulnerability, a fuzzy comprehensive evaluation model of waterlogging risk was constructed by selecting eight representative indicators. Taking Yifeng County in Jiangxi Province as an example, the rainfall boundary conditions of 10-year, 20-year, 50-year and 100-year return periods were designed by the DigitalWater Simulation drainage model to simulate the waterlogging scenario. The data outputted from the DigitalWater Simulation model and other indicator data were inputted in GIS to complete the data processing and fuzzy comprehensive evaluation, and the waterlogging risk distribution map was eventually made. The results showed that the drainage model had certain precision in the simulation of waterlogging scenario. Under the condition of design rainfall with return period of more than 50 years in the study area, the waterlogging area was almost no longer expanded. Compared with the simple risk assessment results, the proportion of high-risk area was reduced by 32.44% after fuzzy comprehensive evaluation, indicating that the waterlogging risk was affected by many indicators.
Last Update:
2021-06-01