Assessment of enhancement benefits on water environment resilience through reclaimed water and stormwater replenishment in rain-fed urban river systems

SUN Xiang; ZHENG Yi; JIANG Jiping; LIN Chao; WANG Qiuliang; WU Qingping

doi:10.13205/j.hjgc.202601012

Volume 44 Issue 1

Jan. 2026

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2026 > 44(1): 110-119

SUN Xiang, ZHENG Yi, JIANG Jiping, LIN Chao, WANG Qiuliang, WU Qingping. Assessment of enhancement benefits on water environment resilience through reclaimed water and stormwater replenishment in rain-fed urban river systems[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(1): 110-119. doi: 10.13205/j.hjgc.202601012

Citation:

SUN Xiang, ZHENG Yi, JIANG Jiping, LIN Chao, WANG Qiuliang, WU Qingping. Assessment of enhancement benefits on water environment resilience through reclaimed water and stormwater replenishment in rain-fed urban river systems[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(1): 110-119. doi: 10.13205/j.hjgc.202601012

Citation:

SUN Xiang, ZHENG Yi, JIANG Jiping, LIN Chao, WANG Qiuliang, WU Qingping. Assessment of enhancement benefits on water environment resilience through reclaimed water and stormwater replenishment in rain-fed urban river systems[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(1): 110-119. doi: 10.13205/j.hjgc.202601012

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Assessment of enhancement benefits on water environment resilience through reclaimed water and stormwater replenishment in rain-fed urban river systems

doi: 10.13205/j.hjgc.202601012

SUN Xiang^1,2,3,
ZHENG Yi²,
JIANG Jiping^{2,4
,
,},
LIN Chao⁵,
WANG Qiuliang⁵,
WU Qingping^2,6

1. School of Environment, Harbin Institute of Technology, Harbin 150090, China;
2. School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China;
3. Shenzhen Ruiyang Water Technology Co., Ltd., Shenzhen 518000, China;
4. School of Ecology and Environment, Harbin Institute of Technology, Shenzhen, Shenzhen 518055, China;
5. Shenzhen Water Planning & Design Institute Co., Ltd., Shenzhen 518000, China;
6. Shenzhen Institute of Environmental Science, Shenzhen 518001, China

Received Date: 2025-05-10
Available Online: 2026-02-26
Publish Date: 2026-01-22

Abstract

Abstract

As China's economy soars and urbanization accelerates， the inadequate sewage treatment infrastructure has resulted in a deteriorating urban water environment， particularly evident in water pollution. The southern coastal hilly regions face seasonal water scarcity， making ecological replenishment of rivers crucial. This study targeted the Longgang River watershed in these regions， utilizing reclaimed water and reservoir water for ecological replenishment. By integrating a coupled hydrodynamic-water quality model with a reliability， resilience， and vulnerability （RRV） assessment framework， the study quantified the resilience enhancement from reclaimed water replenishment. The results revealed that after replenishment with reservoir water， river resilience improved consistently with reliability， with the latter demonstrating a more pronounced enhancement. Notably， uniform replenishment with non-potable reservoir water significantly boosted the resilience of less polluted rivers. Additionally， the resilience-enhancing effects of replenishment were more pronounced for chemical oxygen demand （COD） and ammonia nitrogen （NH₃-N）， compared to total phosphorus （TP）. This study provides insights into optimizing water resource management strategies for resilient urban water environments.
- Pearl River Delta,
- urban water environment,
- resilience,
- unconventional water sources,
- reclaimed water,
- stormwater

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References(33)

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