Water replenishment for ecological flow with E-WAS framework: a case study of the Longgang River Basin, Shenzhen, China

Abstract. With rapid urbanization, there will be more conflict between human systems and the riverine ecological system, and therefore, ecological operations, practices and research must involve the ecological water replenishment of entire river basins with new modeling tools. In this study, we establish an ecological flow-oriented water resource allocation and simulation framework (E-WAS). Virtual reservoirs and ecological units are added to the water resources network. With new water balance equations for virtual reservoirs and ecological units, the E-WAS can simulate the ecological replenishment process in a river basin and can provide a recommended water replenishment scheme that considers optimization principles. The E-WAS was applied in the Longgang River Basin, Shenzhen, China. 17 ecological units and 45 water supply nodes are considered in the model. A water replenishment scheme that used water from 31 reservoirs and reclaimed water from 7 water sewage plants was selected. This scheme significantly increased the satisfactory degree of ecological water demand and efficiently supported the formulation of a control scheme for the water environment of a basin. The E-WAS framework is similar to model plug-ins but helps to avoid the large workload that is required for model redevelopment and can expand the functions of models quickly.

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Small and Medium-Scale River Flood Controls in Highly Urbanized Areas: A Whole Region Perspective

Water ◽

10.3390/w12010182 ◽

2020 ◽

Vol 12 (1) ◽

pp. 182 ◽

Cited By ~ 3

Author(s):

Zengmei Liu ◽

Yuting Cai ◽

Shangwei Wang ◽

Fupeng Lan ◽

Xushu Wu

Keyword(s):

Flood Control ◽

Cost Effective ◽

Rapid Urbanization ◽

Guangzhou City ◽

Medium Scale ◽

Inundation Depth ◽

Control Scheme ◽

Social And Economic Development ◽

Urbanized Areas

While rapid urbanization promotes social and economic development, it poses a serious threat to the health of rivers, especially the small and medium-scale rivers. Flood control for small and medium-scale rivers in highly urbanized areas is particularly important. The purpose of this study is to explore the most effective flood control strategy for small and medium-scale rivers in highly urbanized areas. MIKE 11 and MIKE 21 were coupled with MIKE FLOOD model to simulate flooding with the flood control standard, after which the best flooding control scheme was determined from a whole region perspective (both the mainstream and tributary conditions were considered). The SheGong River basin located near the Guangzhou Baiyun international airport in Guangzhou city over south China was selected for the case study. The results showed that the flooding area in the basin of interest accounts for 42% of the total, with maximum inundation depth up to 0.93 m under the 20-year return period of the designed flood. The flood-prone areas are the midstream and downstream where urbanization is high; however the downstream of the adjacent TieShan River is still able to bear more flooding. Therefore, the probable cost-effective flood control scheme is to construct two new tributaries transferring floodwater in the mid- and downstream of the SheGong River into the downstream of the TieShan River. This infers that flood control for small and medium-scale rivers in highly urbanized areas should not simply consider tributary flood regimes but, rather, involve both tributary and mainstream flood characters from a whole region perspective.

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Assumption-Simulation-Feedback-Adjustment (ASFA) Framework for Real-Time Correction of Water Resources Allocation: a Case Study of Longgang River Basin in Southern China

Water Resources Management ◽

10.1007/s11269-018-2024-3 ◽

2018 ◽

Vol 32 (12) ◽

pp. 3871-3886 ◽

Cited By ~ 1

Author(s):

Shenlin Li ◽

Xiaohong Chen ◽

Vijay P. Singh ◽

Yanhu He

Keyword(s):

Water Resources ◽

Real Time ◽

River Basin ◽

Southern China ◽

Resources Allocation ◽

Water Resources Allocation ◽

Time Correction ◽

Simulation Feedback ◽

Longgang River Basin

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Exploration on water environment control scheme of black and odorous water body in Houhai River Basin

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/781/3/032060 ◽

2021 ◽

Vol 781 (3) ◽

pp. 032060

Author(s):

Zhihua Cheng ◽

Qiong Zhang

Keyword(s):

River Basin ◽

Water Body ◽

Water Environment ◽

Control Scheme ◽

Environment Control

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Calculation of targeted eco-environmental water requirements in a dry inland river: a case study of the Yarkand River Basin, Xinjiang, China

SN Applied Sciences ◽

10.1007/s42452-021-04676-4 ◽

2021 ◽

Vol 3 (6) ◽

Author(s):

Aihong Fu ◽

Weihong Li ◽

Yi Wang

Keyword(s):

Water Resources ◽

River Basin ◽

Arid Regions ◽

Riparian Forest ◽

Environmental Water ◽

Water Requirements ◽

Inland River ◽

Ecological Water Demand ◽

Ecological Protection

AbstractAnalysis of eco-environmental water requirements along a dry inland river under extreme drought conditions can provide a theoretical basis for the sustained utilization and management of water resources in arid regions. This paper uses the Yarkand River Basin in Xinjiang, China, as a case study to determine and assess a method to calculate targeted eco-environmental water requirements (TEEWR) for different ranges of ecological protection of inland riparian forests. The proposed method is intended to comprehensively analyze the water resources along arid inland rivers. Specifically, the ranges of ecological protection were gradually expanded at intervals of 1 km (or multiples of the smallest distance) away from the river course while the TEEWR was determined as a function of the ecological water demand of riparian forest vegetation (Yec) and its corresponding river loss (Xloss). The developed method was shown to be feasible for analyzing TEEWR in the Yarkand River Basin and thus provides a novel and effective approach for the rational utilization and management of water resources in inland river basins in arid regions.Article Highlights Zones of ecological protection were gradually expanded at intervals of 1 km (or multiples of the smallest distance) away from the river course on both sides of the dry inland river The targeted eco-environmental water requirement, defined as the ecological water demand of riparian forest vegetation (Yec) and its corresponding river loss (Xloss), was determined for a dry inland river basin The developed methods for calculating targeted eco-environmental water requirements are useful, but have limitations.

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