Discussion on LID index model construction framework and its graphical application

doi:10.3969/j.issn.1000-5641.2021.04.003

Abstract

Abstract:

In this paper, we propose the concept of “LID (low impact development) Index” and “LID Runoff Reduction Efficiency” based on an analysis of runoff cutting efficiency for different LID technical measures. A map was designed to help quickly select the appropriate LID facility and its proportions according to the pollution reduction target in a built-up area. It shows that when the‘LID index’ increases, surface runoff and pollutants exhibit a similar exponential function form; the larger the LID index, the lower the “LID runoff reduction efficiency”. The model data is easy to obtain and flexible, rendering potential applications worthy of exploration.

Key words: LID, runoff pollution, sponge city

CLC Number:

X522

Meiyin QIAN, Kai YANG, Sheng XIE, Lei DING, Lu XU, Ying CHEN. Discussion on LID index model construction framework and its graphical application[J]. Journal of East China Normal University(Natural Science), 2021, 2021(4): 17-25.

Figures/Tables 7

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References 14

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LID面积占比(L_x)/%	LID径流削减率(L_y)/%	LID指数(L = L_x × L_y)	地表径流量(R'_地表)
5	90	0.045	代入式(5)计算得到
	70	0.035
	50	0.025
	30	0.015
…	…	…	…

LID设施名称	径流削减率/%
透水路面	40 ~ 90^[12]
生物滞留网络	35 ~ 100^[13]
植草沟	40 ~ 70^[14]
雨水槽	35 ~ 90
雨水湿地	70 ~ 80

LID 面积占比 (L_x)/%	LID径流削减率 (L_y)/%	LID指数 (L = L_x × L_y)	地表径流量 (R'_地表)/m³
5	90	0.045	12539903.34
	70	0.035	12703823.65
	50	0.025	12867743.95
	30	0.015	13031664.26
15	90	0.135	11392461.20
	70	0.105	11884222.12
	50	0.075	12375983.04
	30	0.045	12867743.95
30	90	0.270	9671298.00
	70	0.210	10654819.83
	50	0.150	11638341.66
	30	0.090	12621863.49
60	90	0.540	6228971.59
	70	0.420	8196015.26
	50	0.300	10163058.92
	30	0.180	12130102.58
90	90	0.810	2786645.19
	70	0.630	5737210.68
	50	0.450	8687776.17
	30	0.270	11638341.66

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