DU Jia-hui,XUE Xiang-shan,ZOU Rong,et al.Case Design of Sponge City with the Characteristics of Plateau Slope[J].China Water & Wastewater,2020,36(16):30-34.
具有高原阶梯型坡地特点的海绵城市设计案例
- Title:
- Case Design of Sponge City with the Characteristics of Plateau Slope
- 摘要:
- 以玉溪市大河以北片区为例，从高原阶梯型坡地城市的自然本底条件出发，分析径流形成的时空特性，考虑梯级地形中坡度对污染物去除的影响，结合城市未来发展，融合低影响开发建设的总体理念与六字方针，提出“分级滞蓄、梯级净化、就近回用、系统治理”的立体型海绵城市设计思路，集成适宜各级区域海绵措施应用的指导策略，探索总结适合高原阶梯型海绵城市建设的一些理念和方法。研究发现，一级平坝区的设计策略建议为“蓄、净、排”，用以加强径流存蓄和降低洪涝风险；二级台地区域设计策略建议为“滞、蓄、净”，并结合土壤低渗透性特点，局部采用海绵工程手段融合“渗”的策略，用以提高径流控制与面源污染治理；三级山体区域设计建议以“渗、滞、净”为主，用以净化源头径流。
- Abstract:
- Taking the north area of the Dahe River in Yuxi City as an example, the temporal and spatial characteristics of runoff formation, and the influence of slope on the removal of pollutants in the stepped topography were analyzed, which were based on the natural background conditions of the plateau stepped city. Considering the future development of Yuxi City, combining the overall concept and six-character policy of low impact development construction, the three-dimensional sponge city design idea of “grading depot, step purification, nearby recycle, system management” was proposed. Meanwhile, the guiding strategy suitable for the application of sponge measures at all levels was integrated, for purpose of exploring suitable methods for the sponge construction in the plateau stepped city. This study also found that the design strategy of the first-level plain area was suggested as “storage, purification, and drainage” in order to strengthen runoff storage and reduce flood risk. The design strategy of the second-level area was suggested as “stagnation, storage, and purification”. Combined with the characteristics of low permeability of soil, the sponge technology method integrated with “infiltration” strategy was applied to control runoff and non-point source pollution. The design of the third-level mountain area was mainly based on “infiltration, stagnation and purification” to purify the source runoff.
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