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

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 182 ◽  
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.

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

2020 ◽  
Vol 383 ◽  
pp. 327-339
Author(s):  
Ziqi Yan ◽  
Zuhao Zhou ◽  
Xuefeng Sang ◽  
Hao Wang ◽  
Yangwen Jia
Keyword(s):  
River Basin ◽  
Water Environment ◽  
Simulation Framework ◽  
Modeling Tools ◽  
Rapid Urbanization ◽  
Ecological Water Demand ◽  
Control Scheme ◽  
Ecological Flow ◽  
Longgang River Basin

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.

scholarly journals Multiobjective Optimization Model for Sustainable Waste Management Network Design

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Sun Olapiriyakul ◽  
Warut Pannakkong ◽  
Warith Kachapanya ◽  
Stefano Starita
Keyword(s):  
Multiobjective Optimization ◽  
Waste Management ◽  
Optimization Model ◽  
Negative Impact ◽  
Cost Effective ◽  
Management Systems ◽  
Large Share ◽  
Rapid Urbanization ◽  
Transportation Routes

Inefficient or poorly planned waste management systems are a burden to society and economy. For example, excessively long waste transportation routes can have a negative impact on a large share of the population. This is exacerbated by the rapid urbanization happening worldwide and in developing countries. Sustainability issues should be accounted for at every stage of decision making, from strategic to daily operations. In this paper, we propose a multiobjective optimization model to design a cost-effective waste management supply chain, while considering sustainability issues such as land-use and public health impacts. The model is applied to a case study in Pathum Thani (Thailand) to provide managerial insights.

scholarly journals Flood Mitigation Using an Innovative Flood Control Scheme in a Large Lake: Dongting Lake, China

2019 ◽  
Vol 9 (12) ◽  
pp. 2465 ◽  
Author(s):  
Yizhuang Liu ◽  
Shu-Qing Yang ◽  
Changbo Jiang ◽  
Muttucumaru Sivakumar ◽  
Keith Enever ◽  
...  
Keyword(s):  
Flood Control ◽  
Dongting Lake ◽  
Water Levels ◽  
Large Lake ◽  
Flood Level ◽  
Control Scheme ◽  
Flood Disasters ◽  
Maximum Water ◽  
Dead Storage

A large lake plays an important role in mitigating flood disasters in its nearby regions during the flooding period; however, the effect is limited, because most of its storage capacity becomes dead storage prior to the arrival of the flood wave. In the current study, an innovative flood control scheme (IFCS) is applied to Dongting Lake (the second largest freshwater lake in China) to alleviate flood disasters. MIKE 21 FM was used to examine its feasibility to mitigate flood disasters. One of the largest floods in the 20th century, the 1998-type flood, was modelled and the maximum water levels with/without IFCS were compared. The result shows that the effective flood control storage could be at least doubled when compared with the natural condition once IFCS was applied. The peak flood level in the Dongting Lake could be lowered by at least 0.32 m at the Chenglingji station in the same flood passage of Dongting Lake. The case study reveals that, after applying IFCS, the hydraulic gates play a very important role in floodwater regulation and further study should be conducted to find the optimized operation for each gate in the flood control scheme system.

scholarly journals FLOOD AND TSUNAMI FLOW IN RELATION TO THE LANDFORMS OF COASTAL AND ALLUVIAL LOWLANDS-CASE STUDY IN HAT YAI AND BANDA ACEH PLAINS

2009 ◽  
Vol 12 (9) ◽  
pp. 68-77
Author(s):  
Masatomo UMITSU
Keyword(s):  
Coastal Plain ◽  
Regional Differences ◽  
Flood Control ◽  
Alluvial Fan ◽  
Delta Plain ◽  
Flood Depth ◽  
Inundation Depth ◽  
The Difference ◽  
Flood Condition

Flood control is a very important issue of the environmental management in the alluvial and coastal plains. For the detail management, it is necessary to know the behavior of the flooding on the plains. Micro landforms of these plains are closely related to the flow and inundation depth of floods. Landforms of an alluvial plain are roughly classified into three units. alluvial fan, floodplain and delta. Landforms of these units are further classified into micro landforms as natural levee, flood basin, paleo-river channel, beach ridges and so on. The places on a higher micro landforms are generally flood free places or the places where the flood depth is shallow. On the contrary, flood water concentrate on the place of the lower micro-landforms as flood basin or back swamp and inundation depth is deep in the areas. Coastal areas as coastal plain or delta plain are subjected to the inundation by tidal surge or tsunami. Regional differences of the landforms of the coastal plain are also related to the difference of flood condition in a plain. Hazard map or risk map for the flood disasters should be taken the characteristics of micro landforms into consideration.

scholarly journals Effects of Urban Forms on Separate Drainage Systems: A Virtual City Perspective

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 758 ◽  
Author(s):  
Jia ◽  
Sitzenfrei ◽  
Rauch ◽  
Liang ◽  
Liu
Keyword(s):  
Urban Form ◽  
Domestic Wastewater ◽  
Cost Effective ◽  
Three Dimensions ◽  
Rapid Urbanization ◽  
Drainage Systems ◽  
Urban Forms ◽  
Storm Water Management Model ◽  
Wastewater Systems ◽  
Performance Dimensions

The development of urban drainage systems is challenged by rapid urbanization; however, little attention is paid to the urban form and its effects on these systems. This study develops an integrated city-drainage model that configures typical urban forms and their associated drainage infrastructures, specifically domestic wastewater and rainwater systems, to analyze the relationship between them. Three typical types of urban forms were investigated: the square, the star, and the strip. Virtual cities were designed first, with the corresponding drainage systems generated automatically and then linked to a model herein called the Storm Water Management Model (SWMM). Evaluation was based on 200 random configurations of wastewater/rainwater systems with different structures or attributes. The results show that urban forms play more important roles on three dimensions of performance, namely economic efficiency, effectiveness, and adaptability, of the rainwater systems than of the wastewater systems. Cost is positively correlated to the effectiveness of rainwater systems among the different urban forms, while adaptability is negatively correlated to the other two performance dimensions. Regardless of the form, it is difficult for a city to make its drainage systems simultaneously cost-effective, efficient, and adaptable based on the virtual cities we investigated. This study could inspire the urban planning of both built-up and to-be-built areas to become more sustainable with their drainage infrastructure by recognizing the pros and cons of different macroscale urban forms.

scholarly journals The application of environmental governance for sustainable watershed-based management

2021 ◽  
Author(s):  
Seiichi Kagaya ◽  
Tetsuya Wada
Keyword(s):  
Environmental Protection ◽  
River Basin ◽  
Watershed Management ◽  
Water Use ◽  
Flood Control ◽  
Environmental Governance ◽  
Planning Process ◽  
Environment Assessment ◽  
Control Water

AbstractIn recent years, it has become popular for some of countries and regions to adapt the system of governance to varied and complex issues concerned with regional development and the environment. Watershed management is possibly the best example of this. It involves flood control, water use management and river environment simultaneously. Therefore, comprehensive watershed-based management should be aimed at balancing those aims. The objectives of this study are to introduce the notion of environmental governance into the planning process, to establish a method for assessing the alternatives and to develop a procedure for determining the most appropriate plan for environmental governance. The planning process here is based on strategic environment assessment (SEA). To verify the hypothetical approach, the middle river basin in the Tokachi River, Japan was selected as a case study. In practice, after workshop discussions, it was found to have the appropriate degree of consensus based on the balance of flood control and environmental protection in the watershed.

The socio-spatial politics of royalties and their distribution: A case study of the Surat Basin, Queensland

2021 ◽  
pp. 0308518X2110266
Author(s):  
Neil Argent ◽  
Sean Markey ◽  
Greg Halseth ◽  
Laura Ryser ◽  
Fiona Haslam-McKenzie
Keyword(s):  
Cost Effective ◽  
Indigenous Communities ◽  
Energy Extraction ◽  
Grant Application ◽  
Coal Seam Gas ◽  
Spatial Politics ◽  
Developmental Needs ◽  
Development Fund ◽  
Effective Use

This paper is concerned with the socio-spatial and ethical politics of redistribution, specifically the allocation of natural resources rents from political and economic cores to the economic and geographical peripheries whence the resource originated. Based on a case study of the coal seam gas sector in Queensland's Surat Basin, this paper focuses on the operation of the Queensland State Government's regional development fund for mining and energy extraction-affected regions. Employing an environmental justice framework, we critically explore the operation of these funds in ostensibly helping constituent communities in becoming resilient to the worst effects of the ‘staples trap’. Drawing on secondary demographic and housing data for the region, as well as primary information collected from key respondents from mid-2018 to early 2019, we show that funds were distributed across all of the local government areas, and allocated to projects and places primarily on a perceived economic needs basis. However, concerns were raised with the probity of the funds’ administration. In terms of recognition justice, the participation of smaller and more remote towns and local Indigenous communities was hampered by their structural marginalisation. Procedurally, the funds were criticised for the lack of local consultation taken in the development and approval of projects. While spatially concentrated expenditure may be the most cost-effective use of public monies, we argue that grant application processes should be open, transparent and inclusive, and the outcomes cognisant of the developmental needs of smaller communities, together with the need to foster regional solidarity and coherence.

scholarly journals Toward Decentralised Sanitary Sewage Collection Systems: A Multiobjective Approach for Cost-Effective and Resilient Designs

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1886
Author(s):  
Arezoo Zahediasl ◽  
Amin E. Bakhshipour ◽  
Ulrich Dittmer ◽  
Ali Haghighi
Keyword(s):  
Treatment Plant ◽  
Drainage System ◽  
Cost Effective ◽  
Optimization Approach ◽  
Hydraulic Design ◽  
Multiobjective Approach ◽  
Layout Generation ◽  
Plant Allocation ◽  
Problem Solving Process

In recent years, the concept of a centralized drainage system that connect an entire city to one single treatment plant is increasingly being questioned in terms of the costs, reliability, and environmental impacts. This study introduces an optimization approach based on decentralization in order to develop a cost-effective and sustainable sewage collection system. For this purpose, a new algorithm based on the growing spanning tree algorithm is developed for decentralized layout generation and treatment plant allocation. The trade-off between construction and operation costs, resilience, and the degree of centralization is a multiobjective problem that consists of two subproblems: the layout of the networks and the hydraulic design. The innovative characteristics of the proposed framework are that layout and hydraulic designs are solved simultaneously, three objectives are optimized together, and the entire problem solving process is self-adaptive. The model is then applied to a real case study. The results show that finding an optimum degree of centralization could reduce not only the network’s costs by 17.3%, but could also increase its structural resilience significantly compared to fully centralized networks.

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