Spatial distribution of ice hazards in middle route of South-to-North Water Transfer Project based on fuzzy evaluation model
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
The middle route of the South-to-North Water Transfer project is long and runs across a wide range of altitudes, and it will suffer from the risks of ice clogging and damming during the freezing period. The risk of ice jam accumulation as well as the break-up pattern vary with the tortuosity, cross-section width and other geographical conditions of the channel. Therefore, it is necessary to study the spatial distribution of the ice hazards in order to realize hierarchical management of channels, save operating costs and increase the ability to deal with risks. This paper established a risk evaluation index system and evaluation model to obtain the spatial distribution of the ice hazards by quantifying the channel’s geographical conditions based on the fuzzy evaluation theory. First, four geographical indicators that predispose to ice hazards were obtained including longitudinal slope, tortuosity of channel, cross-section width and obstacles. And then, the quantitative method for geographical conditions was improved based on the mechanism of ice jam formation, and the risk evaluation index system was established. Lastly, the Beijing-Shijiazhuang section was taken as a case study, in which the risks of different canal reaches were evaluated with the proposed model by partitioning the section into multiple unit channels. Results showed that the ice hazards of a unit channel can fall into five levels, and the hazards are the largest in the Xihei Mountain Regulator – Baohe River Regulator Reach and Fenzhuang River Regulator – Nanjuma Regulator Reach. The research findings can offer some valuable guidance to ice damage prevention and control.
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