湿陷性黄土地区海绵城市建设研究进展

海绵城市作为城市雨洪管理、人居环境改善的重要手段,在水资源、水环境及水灾害问题突出的湿陷性黄土地区开展具有现实意义。为保证湿陷性黄土地区海绵城市建设的有效性与安全性,通过梳理黄土水分入渗规律、湿陷机理及湿陷性黄土地区海绵城市建设的研究趋势和不足,总结了湿陷性黄土地区海绵城市安全有效推进所面临的问题主要有:海绵城市建设需求旺盛但科技支撑薄弱; 海绵设施“渗、滞、蓄”功能需求与黄土的水敏性和湿陷性矛盾突出; 海绵城市建设冒进式开发与总体供给不足,规划水平有待提高。为了克服上述问题,提高海绵城市开发质量,当前面对的挑战体现在:差异化地层条件、渗流边界和应用场景下湿陷性黄土场地海绵城市建设的成套技术研发; 湿陷性黄土场地海绵城市建设的适宜性评价体系和风险评估理论构建; 黄土地区海绵城市建设规划的方法优化。

Review on Sponge City Construction in Collapsible Loess Area

It is of great significance to develop sponge city in collapsible loess area where disasters and unbalance of water are serious, and the construction of sponge city plays a positive role in the management of urban rain flood and the improvement of living environment. In order to ensure the effectiveness and safety of sponge city construction in collapsible loess area, by analyzing the water infiltration of collapsible loess and the construction of sponge city, the research progress of water infiltration law, collapsible deformation and construction of sponge city in loess area were summarized. The main problems of sponge city safety and effective promotion in collapsible loess area are as follows: The demand of sponge city construction is strong, but the support of science and technology is weak; the contradiction between the functional demand of sponge facilities “seepage, stagnation and storage” and the water sensitivity and collapsibility of loess is prominent; the development and supply of sponge city construction are insufficient, and the planning level needs to be improved. To overcome the above problems and improve the quality of sponge city, the current challenges are as follows: Different formation conditions, seepage boundary and application scene of sponge city construction should be studied in collapsible loess site; suitability evaluation system and risk assessment theory of sponge city in collapsible loess site should be developed; meanwhile, the planning method could be optimized.