Acta Geographica Sinica ›› 2021, Vol. 76 ›› Issue (1): 153-166.doi: 10.11821/dlxb202101012

• Water Cycle and Related Land Surface Processes • Previous Articles     Next Articles

Stormwater management path in Fenghuang, Hunan

CHEN Na1(), REN Anzhi1, MA Bo2, LI Jingyu1, XIANG Hui1()   

  1. 1. School of Architecture, Hunan University, Changsha 410082, China
    2. Ningxia Research Institute of Science and Technology Development Strategy and Information, Yinchuan 750001, China
  • Received:2019-12-20 Revised:2020-10-31 Online:2021-01-25 Published:2021-03-25
  • Contact: XIANG Hui;
  • Supported by:
    National Natural Science Foundation of China(51908202);Natural Science Foundation of Hunan Province(2018JJ3055)


Practices in developed countries reveal that low impact development based on rainfall flooding control measures can effectively alleviate rainfall flooding. Focusing on the relevance of new and old towns in the development of sponge cities in China, we try to put forward a stormwater management path of "present situation appraisal - decomposition of low impact development indicators - simulation and verification of construction result". A case study is unfolded on Fenghuang County, Hunan Province. On the basis of urban waterlogging model, the rainfall flooding risk evaluation and renewal feasibility evaluation is conducted on the new and old towns; based on the evaluation of the present situation, a low impact development control indicator decomposition system is established accordingly to implement low impact development conceptually and technically from macro control strategy to detailed planning, and the validity of this path is verified through simulation of the water accumulating volume of the stagnant point. The results indicate that the old towns of Fenghuang County have a higher rainfall flooding risk and an evidently lower current annual runoff volume control rate than the new towns, however, the old towns have a much lower transformation feasibility than the new towns due to large historical and cultural preservation areas and a lower terrain. From the perspective of the integrity of new and old towns, more runoff discharge and peak runoff can be reduced by establishing a three-level (Proper-Block-Plot) indicator decomposition system so as to lighten the pressure of flood disaster in the lower old towns. However, under the circumstance of heavy rainstorm, it is still very difficult to solve the problem of waterlogging only by low impact development facilities, and grey infrastructures based on water accumulating volume calculation are also needed in order to efficiently control water logging caused by short intense rainfall.

Key words: new and old towns, sponge city, low impact development, stormwater management