ZHANG Xian-wei,GONG Yong-wei,YIN Ding-kun,et al.Effect of Extensive Green Roof on Regulation of Nutrients in Rainfall Runoff [J].China Water & Wastewater,2020,36(13):106-112.
Effect of Extensive Green Roof on Regulation of Nutrients in Rainfall Runoff
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
13
Page:
106-112
Column:
Date of publication:
2020-07-01
- Keywords:
- green roof; structural layer material; nutrient concentration; total nutrient reduction rate
- Abstract:
-
The differences of nutrient concentration, nutrient total amount and reducing capacity of rainfall runoff in three extensive green roof experiments were explored by longterm monitoring of natural rainfall and artificial rainfall experiments, and the effect of substrate layer, drainage layer selection and precipitation on regulation of runoff nutrients of green roof were analyzed. The concentration of NH4+-N,?NO3--N and TP in the green roof runoff was higher than that of the concrete roof. There was no significant difference in nutrient concentration of green roof effluent when different drainage layers were adopted. When ultra-light substrate was used as the substrate layer, the TP concentration of the green roof runoff was higher, but the NH4+-Nconcentration was lower. Green roof could reduce part of the total amount of NH4+-N,NO3--N and TP in the runoff. Green roofs with different substrate layer and the drainage layer had no significant difference on different nutrient total amount reduction. In addition to the difference caused by the selection of different structural layers of the green roof, precipitation and prior dry period were important factors affecting NO3--N and TP concentration, total nutrient amount and total reduction rate of green roof effluent.
Last Update:
2020-07-01