Determining Effective Impervious Area for Urban Hydrologic Modeling

Han, Woo Suk; Burian, Steven J.

doi:10.1061/(asce)1084-0699(2009)14:2(111)

Cited by 81 publications

(45 citation statements)

References 24 publications

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“…Another parameter related to impervious area is effective impervious area (EIA) which is the portion of TIA that is directly connected to the drainage system. Definition of hydraulically connected is water that falls on impervious cover will travel through impervious lane into the inlet of drainage channel [6]. Referring to the result of the study, this research will predict the flood discharge in Katulampa Weir using the information of imperviousness determined based on TIA and EIA method.…”

Section: Introductionmentioning

confidence: 99%

Influence of impervious cover determination method of upper Ciliwung watershed on flood warning system level change in Katulampa weir

2018

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Abstract. The Katulampa Weir is a part of Jakarta Flood Early Warning System for the Ciliwung River. The measured water level fluctuation in the Katulampa Weir is affected by the physical condition of the Upper Ciliwung Watershed. In this study, the definition and relevance of the impervious cover determination method based on the Total Impervious Area (TIA) and Effective Impervious Area (EIA) in generating design flood discharge and its effect on the change of flood early warning level in Katulampa Weir will be evaluated. Identification of land use distribution is based on digitized process used combined GIS maps using visual interpretation of high resolution satellite images 2017. The flood analysis for both methods is applied to the same rain conditions. Evaluation of flood early warning level changes are based on flood discharge simulated results and rating curve discharge in the Katulampa Weir. The simulation by WinTR-20 gives that maximum discharge using TIA method is 150 m 3 /s and EIA method 139.5 m 3 /s. There is no significant difference between and both are classified as the same level of flood early warning system level, which is on stage 3. However, for large watersheds, it takes much effort to identify and digitize an effective impervious area.

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Section: Introductionmentioning

confidence: 99%

Influence of impervious cover determination method of upper Ciliwung watershed on flood warning system level change in Katulampa weir

2018

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“…TIA is the sum of all noninfiltrating surfaces. EIA, or directly connected impervious area, includes only those impervious areas that drain into a piped storm sewer and further discharge into a surface-water body (e.g., parking lot runoff goes directly to a stormwater drain) [36,37]. Recent studies suggest that EIA increases when the connectivity of TIA increases and that development patterns can be better indicators than TIA alone in estimating stormwater runoff and pollutant exports [38,39].…”

Section: Introductionmentioning

confidence: 99%

Green Infrastructure Design for Stormwater Runoff and Water Quality: Empirical Evidence from Large Watershed-Scale Community Developments

Yang

2013

Water

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Green infrastructure (GI) design is advocated as a new paradigm for stormwater management, whereas current knowledge of GI design is mostly based on isolated design strategies used at small-scale sites. This study presents empirical findings from two watershed-scale community projects (89.4 km 2 and 55.7 km 2 ) in suburban Houston, Texas. The GI development integrates a suite of on-site, infiltration-based stormwater management designs, and an adjacent community development follows conventional drainage design. Parcel data were used to estimate the site impervious cover area. Observed streamflow and water quality data (i.e., NO 3 -N, NH 3 -N, and TP) were correlated with the site imperviousness. Results show that, as of 2009, the impervious cover percentage in the GI site (32.3%) is more than twice that of the conventional site (13.7%). However, the GI site's precipitation-streamflow ratio maintains a steady, low range, whereas this ratio fluctuates substantially in the conventional site, suggesting a "flashy" stream condition. Furthermore, in the conventional site, annual nutrient loadings are significantly correlated with its impervious cover percentage (p < 0.01), whereas in the GI site there is little correlation. The study concludes that integrated GI design can be effective in stormwater runoff reduction and water quality enhancement at watershed-scale community development.

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“…Recently, the connectivity of impervious areas in urban catchments received more attention in terms of hydrologic responses (Lee and Heaney, 2003;Han and Burian, 2009). The impervious areas hydraulically connected to inlets and the route leading directly to a storm water drainage system are referred to as directly connected impervious areas (DCIA) or effective impervious areas (hereafter, DCIA) (Han and Burian, 2009;Roy and Shuster, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…The impervious areas hydraulically connected to inlets and the route leading directly to a storm water drainage system are referred to as directly connected impervious areas (DCIA) or effective impervious areas (hereafter, DCIA) (Han and Burian, 2009;Roy and Shuster, 2009). This subset of impervious surfaces in urban catchments may be responsible for the majority of stream alteration due to urbanization (Booth and Jackson, 1997;Brabec et al, 2002;Walsh et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Contribution of directly connected and isolated impervious areas to urban drainage network hydrographs

Seo

Choi

Schmidt

2013

Hydrol. Earth Syst. Sci.

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Abstract. This paper addresses the mass balance error observed in runoff hydrographs in urban watersheds by introducing assumptions regarding the contribution of infiltrated rainfall from pervious areas and isolated impervious area (IIA) to the runoff hydrograph. Rainfall infiltrating into pervious areas has been assumed not to contribute to the runoff hydrograph until Hortonian excess rainfall occurs. However, mass balance analysis in an urban watershed indicates that rainfall infiltrated to pervious areas can contribute directly to the runoff hydrograph, thereby offering an explanation for the long hydrograph tail commonly observed in runoff from urban storm sewers. In this study, a hydrologic analysis based on the width function is introduced, with two types of width functions obtained from both pervious and impervious areas, respectively. The width function can be regarded as the direct interpretation of the network response. These two width functions are derived to obtain distinct response functions for directly connected impervious areas (DCIA), IIA, and pervious areas. The results show significant improvement in the estimation of runoff hydrographs and suggest the need to consider the flow contribution from pervious areas to the runoff hydrograph. It also implies that additional contribution from flow paths through joints and cracks in sewer pipes needs to be taken into account to improve the estimation of runoff hydrographs in urban catchments.

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Determining Effective Impervious Area for Urban Hydrologic Modeling

Cited by 81 publications

References 24 publications

Influence of impervious cover determination method of upper Ciliwung watershed on flood warning system level change in Katulampa weir

Influence of impervious cover determination method of upper Ciliwung watershed on flood warning system level change in Katulampa weir

Green Infrastructure Design for Stormwater Runoff and Water Quality: Empirical Evidence from Large Watershed-Scale Community Developments

Contribution of directly connected and isolated impervious areas to urban drainage network hydrographs

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