Introduction of innovative stormwater techniques within a distributed hydrological model and the influence on the urban catchment behaviour

2007 ◽  
Vol 2 (2) ◽  
Author(s):  
F. Rodriguez ◽  
F. Morena ◽  
H. Andrieu ◽  
G. Raimbault
Keyword(s):  
Hydrological Model ◽  
Distributed Hydrological Model ◽  
Tree Plantation ◽  
Widespread Application ◽  
Urban Catchment ◽  
Total Runoff ◽  
Runoff Reduction ◽  
Urban Modelling ◽  
Direct Infiltration ◽  
Flat Roofs

This study presents the implementation of innovative stormwater techniques into a distributed hydrological model. This model, is able to represent hydrological processes usually neglected in urban modelling, such as evapotranspiration, infiltration in roads, or direct infiltration of soil water in sewers. The introduction of innovative stormwater techniques such as flat roofs, permeable reservoir pavements or tree plantation can be easily performed in this very modular model. A small urban catchment in Nantes (France) is taken as case study to analyse the influence of these innovative techniques on the hydrological catchment behaviour. The influence of innovative stormwater techniques on the distribution of runoff sources in the catchment, and on total runoff, varies between scenarios. The biggest runoff reduction is delivered by widespread application of flat roofs.

Development of a distributed hydrological model based on urban databanks – production processes of URBS

2005 ◽  
Vol 52 (5) ◽  
pp. 241-248 ◽  
Author(s):  
F. Rodriguez ◽  
F. Morena ◽  
H. Andrieu
Keyword(s):  
Land Use ◽  
Transfer Function ◽  
Hydrological Model ◽  
Urban Runoff ◽  
Distributed Hydrological Model ◽  
Production Processes ◽  
Urban Modelling ◽  
Direct Infiltration ◽  
Urban Catchments ◽  
Hydrological Variables

The objective of this study is to present a distributed hydrological model especially dedicated to urban catchments, and able to represent hydrological processes usually neglected in urban modelling, such as evapotranspiration, infiltration in roads, or direct infiltration of soil water in sewers. This model, called URBS (as Urban Runoff Branching Structure) is distributed considering the spatial variability of land use which is well known thanks to urban databanks managed by GIS. The production function is detailed at each cadastral parcel scale, and the runoff produced is routed by a simple transfer function. The estimation of the input parameters of the model is mostly based on physical considerations, and the model is applied on a suburban catchment in Nantes (France) in order to evaluate the interest of the distribution of the hydrological variables.

scholarly journals RECONSTRUCTION OF THE 2007 JAKARTA FLOOD BY J2000 HYDROLOGICAL MODEL

2018 ◽  
Author(s):  
Miga Magenika Julian
Keyword(s):  
Water Flow ◽  
Overland Flow ◽  
Hydrological Model ◽  
Sunshine Duration ◽  
Morphological Data ◽  
Distributed Hydrological Model ◽  
Wet Season ◽  
Time Step ◽  
Total Runoff ◽  
High Precipitation

This study addresses to reconstruct the hydrological dynamics during the 2007 Jakarta flood. Katulampa sub-basin in upper Citarum basin is considered as a study area. Katulampa act as a monitoring station of water flow in the upper part of Jakarta. The distributed hydrological model named J2000 was implemented. The model requires the hydrometeorological input as precipitation, temperature, humidity, wind speed and sunshine duration, and also the morphological data for topographic details, land use, soil, and geological information. The period of simulation covers from 1 January 2006 to 31 December 2007, at a daily time step. Observed runoff in Katulampa gauging station is used to validate the model by comparing simulated and observed runoff variables. The model performed reasonably well. The modelling results gave the efficiency of Nash-Sutcliffe (NS) by 0.60, the corresponding coefficient correlation (r) by 0.84 and -1.1% deviations. During the flood event in February 2007, total runoff is dominantly originated by overland flow with 89% of total runoff. This flow comes from the excess of saturated soil during the high precipitation. At that day, the precipitation is nine times higher than the daily average precipitation in the wet season. The results show that the hydrological model can be employed as a powerful tool to reconstruct the hydrological dynamic during the extreme events (i.e. high precipitation). Katulampa station where is located in the upper part of Ciliwung is proposed as an early warning system to aware of water flow before entering to the lowlands area (i.e. Jakarta).

scholarly journals Assessment of Rain Garden Effects for the Management of Urban Storm Runoff in Japan

2020 ◽  
Vol 12 (23) ◽  
pp. 9982
Author(s):  
Linying Zhang ◽  
Zehao Ye ◽  
Shozo Shibata
Keyword(s):  
Low Impact Development ◽  
Oxygen Demand ◽  
Storm Runoff ◽  
Source Control ◽  
Rain Gardens ◽  
Short Term ◽  
Urban Catchment ◽  
Storm Water Management Model ◽  
Total Runoff ◽  
Runoff Reduction

Storm runoff is a growing concern against a background of increasing urban densification, land-use adaptation and climate change. In this study, a storm water management model was used to analyze the hydrological and water-quality effects of rain gardens (also known as bioretention cells) as nonpoint source control solutions in low-impact development (LID) practices for an urban catchment in the Nakagyo Ward area of Kyoto in Japan. The results of simulations with input involving Chicago hyetographs derived for different rainfall return periods (referred to as 3 a, 5 a, 10 a, 30 a, 50 a and 100 a) indicated the effectiveness of this arrangement, in particular for rainstorm 3 a, which exhibited the maximum contaminant reduction ratio (Total Suspended Solids (TSS) 15.50%, Chemical Oxygen Demand (COD) 16.17%, Total Nitrogen (TN) 17.34%, Total Phosphorus (TP) 19.07%) and a total runoff reduction volume of 46.56 × 106 L. With 5 a, the maximum number of flooding nodes was reduced to 87, demonstrating that rain gardens handle rainfall effectively over a five-year return period. There was a one-minute delay for 100 a, which again indicates that rain gardens support control of urban runoff and mitigate flooding. Such gardens were associated with reduced stormwater hazards and enhanced resistance to short-term rainstorms at the research site, and should be considered for urban planning in Kyoto and other cities all over the world.

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