Special Issue "Urban Catchment: Rainfall–Runoff Issues and Responses"

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Hydrology and Hydrogeology".

Deadline for manuscript submissions: 30 August 2020.

Special Issue Editor

Dr. Rupak Aryal
Website
Guest Editor
University of Technology Sydney, Sydney, Australia
Interests: urban hydrology; urban runoff monitoring and modeling; emerging contaminants in urban runoff; pollutant transport; water-sensitive urban design for water management and reuse.

Special Issue Information

Dear Colleagues,

Rapid urbanisation across the globe in the last few decades has changed the rainfall–runoff response in many catchments. Along with population growth, numerous changes in the landscape and impervious ratio in urban areas have also occurred. The change in the landscape in many cities has had a tremendous impact on urban hydrology. This includes changes in rainfall–runoff balance and changes in physical, chemical and biological aspects of water quality. Besides this, urban flooding has become more frequent due to an increase in imperviousness and runoff peak flow. This Special Issue seeks to highlight studies on urban rainfall–runoff monitoring and modelling, the role of imperviousness in urban water quality, the adoption of water-sensitive urban designs to mitigate water quality problems, stormwater harvesting, analytical techniques to examine these linkages and water management, and water policy.

Dr. Rupak Aryal
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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Keywords

  • urban rainfall runoff in a changing climate and landscape
  • urban rainfall runoff modelling
  • issues in urban drainage
  • urban pollutants and transport
  • water-sensitive urban design
  • stormwater recycling and reuse
  • urban runoff and ecological/human health risk
  • urban runoff and future water security
  • urban stormwater recycling and reuse policy and management.

Published Papers (2 papers)

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Research

Open AccessArticle
Rapid Urbanization Impact on the Hydrological Processes in Zhengzhou, China
Water 2020, 12(7), 1870; https://doi.org/10.3390/w12071870 (registering DOI) - 30 Jun 2020
Abstract
Changes in the hydrological process caused by urbanization lead to frequent flooding in cities. For fast-growing urban areas, the impact of urbanization on the hydrological process needs to be systematically analyzed. This study takes Zhengzhou as an example to analyze the impact of [...] Read more.
Changes in the hydrological process caused by urbanization lead to frequent flooding in cities. For fast-growing urban areas, the impact of urbanization on the hydrological process needs to be systematically analyzed. This study takes Zhengzhou as an example to analyze the impact of urbanization on the hydrological process based on 1971–2012 hourly rainfall-runoff data, combining Geographic Information Systems with traditional hydrological methods. Our study indicates that the rain island effect in different districts of city became stronger with the increase of its built-up. The uneven land use resulted in the difference of runoff process. The flood peak lag was 25–30% earlier with the change of land use. The change of flood peak increased by 10–30% with the change of built-up. The runoff coefficient increases by 20–35% with the increase of built-up, and its change increased with the change of land use. Affected by the rain island effect, precipitation tends to occur in areas where built-up is dominant, which overall magnifies the impact of urbanization on the hydrological process. This provides new ideas for urban flood control. Refine flood control standards according to regional land use changes to cope with the hydrological process after urbanization. Full article
(This article belongs to the Special Issue Urban Catchment: Rainfall–Runoff Issues and Responses)
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Open AccessArticle
WetSpa-Urban: An Adapted Version of WetSpa-Python, A Suitable Tool for Detailed Runoff Calculation in Urban Areas
Water 2019, 11(12), 2460; https://doi.org/10.3390/w11122460 - 23 Nov 2019
Abstract
A tool called WetSpa-Urban was developed to respond to the need for precise runoff estimations in an increasingly urbanized world. WetSpa-Urban links the catchment model WetSpa-Python to the urban drainage model Storm Water Management Model (SWMM). WetSpa-Python is an open-source, fully distributed, process-based [...] Read more.
A tool called WetSpa-Urban was developed to respond to the need for precise runoff estimations in an increasingly urbanized world. WetSpa-Urban links the catchment model WetSpa-Python to the urban drainage model Storm Water Management Model (SWMM). WetSpa-Python is an open-source, fully distributed, process-based model that accurately represents surface hydrological processes but does not simulate hydraulic structures. SWMM is a well-known open-source hydrodynamic tool that calculates pipe flow processes in an accurate manner while runoff is calculated conceptually. Merging these tools along with certain modifications, such as improving the efficiency of surface runoff calculation and simulating flow at the sub-catchment level, makes WetSpa-Urban suitable for event-based and continuous rainfall–runoff modeling for urban areas. WetSpa-Urban was applied to the Watermaelbeek catchment in Brussels, Belgium, which recently experienced rapid urbanization. The model efficiency was evaluated using different statistical methods, such as Nash–Sutcliffe efficiency and model bias. In addition, a statistical investigation, independent of time, was performed by applying the box-cox transformation to the observed and simulated values of the flow peaks. By speeding up the simulation of the hydrological processes, the performance of the surface runoff calculation increased by almost 130%. The evaluation of the simulated 10 minute flow versus the observed flow at the outlet of the catchment for 2015 reached a Nash–Sutcliffe efficiency of 0.86 and a bias equal to 0.06. Full article
(This article belongs to the Special Issue Urban Catchment: Rainfall–Runoff Issues and Responses)
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