Improved SCS-CN Method Based on Storage and Depletion of Antecedent Daily Precipitation

Jiao, Pingjin; Xu, Di; Wang, Shaoli; Yang, Yu; Han, Songjun

doi:10.1007/s11269-015-1088-6

Cited by 26 publications

(7 citation statements)

References 25 publications

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“…Huang [11] derived the relationship between slope and CN value, while Chen et al [5] applied this relationship in hillslope cropland of purple soil. Jiao et al and Rajib et al [12,13] combined the soil evapotranspiration and moisture model into the original runoff model, and the prediction accuracy was improved. Mishra and Singh [14][15][16] proposed an improved Mishra-Singh (MS) model by adding the pre-humidity to the model, Sahu improved MS to the Sahu-Mishra-Eldho (SME) model, and then added rainfall duration, and put forward the modified Sahu-Mishra-Eldho (MSME) model.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Rainfall Intensities and Duration on SCS-CN Model Parameters under Simulated Rainfall

Wang

2020

Water

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The Soil Conservation Service curve number (SCS-CN) method has been widely used in rainfall-runoff modelling; however, the direct effects of rainfall intensities and duration, which are major factors in hydrological engineering design, on its parameters (initial abstraction ratio (λ) and potential maximum storage (S), the latter is transformed into curve number (CN)) have seldom been studied. In this study, we chose simulated rainfall experiments on runoff plots (30 mm/h, 180 min; 60 mm/h, 90 min; 90 mm/h, 60 min) to obtain synchronized rainfall-runoff data and calculated the parameters using general model fitting and event analysis methods every ten minutes throughout the duration. The results indicate that the parameters changed with rainfall intensities and duration. S decreased as the rainfall intensities increased. Under the same rainfall intensity, the S increased with the duration overall. The corresponding λ changed with rainfall intensities and duration, and has no obvious relationship under different rainfall intensities. Initial abstraction in the event analysis method is the same as the actual situation and we chose these parameters obtained with the event analysis method as our selected parameters. These selected parameters and the parameters obtained using Fu et al.’s method which was based on the standardized procedure in NEH-630 were evaluated by the Nash–Sutcliffe efficiency (NSE), the percentage deviation coefficient (PBIAS), and the ratio of the root mean square error to the standard deviation of measured data (RSR). The results show that the statistics for the selected parameters satisfied the evaluating standard, and have a better value, while the statistics for the parameters obtained by Fu et al.’s method declined as the rainfall intensity increased, and PBAIS was out of the standard range under 90 mm/h rainfall intensity condition. This indicates that the rainfall intensities and duration have important effects on the parameters of the model, and the parameters vary dynamically with the rainfall intensity and duration. These results could be useful for hydrological design in which engineers consider the return period (i.e., rainfall intensities and duration).

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Section: Introductionmentioning

confidence: 99%

The Effects of Rainfall Intensities and Duration on SCS-CN Model Parameters under Simulated Rainfall

Wang

2020

Water

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“…The CN parameter for the whole catchment amounted to 71. This value was adopted in order to create effective precipitation hyetographs using Equation (12), which are presented in Figure 3. stemming from the soils' permeability.…”

Section: The Nrcs-cn Methodsmentioning

confidence: 99%

Hydrological Analysis of a Dyke Pumping Station for the Purpose of Improving Its Functioning Conditions

Machajski

Kostecki

2018

Water

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This paper presents a methodology of calculating the water transfer capacity of a dyke pumping station in flood wave conditions in order to improve its functioning, especially with regards to the safety of the areas being drained. The exemplary analysis was carried out for a pumping station situated on a small right-bank tributary of the Odra River in the southwest part of Poland, which, due to the inadequate capacity of its pumps, extensively flooded the surrounding areas in May and June 2010. Hydrological analyses were conducted in order to determine the rate of the designed and control flows using a spatial regression equation, and as a comparison, the rainfall-runoff method was also used. The corresponding flood-wave hydrographs were also determined, which included total precipitation using the German Association For Water Resources and Land Improvement (DVWK) method, effective precipitation using the Natural Resource Conservation Service curve number (NRCS-CN) method, as well as hypothetical waves using the instantaneous unit hydrograph (IUH) method. Flood-wave routing was carried out and alternative solutions for both the output of the required pumps and the retarding reservoir capacity were highlighted on this basis. The paper presents the possibility of a correct pump capacity selection, and in turn, the size of the pumping station retarding reservoir that results from this selection. This will enable pumping station exploitation costs or maintenance costs of the retarding reservoir to be considerably reduced.

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“…For given land uses and soil types, the Soil Conservation Service curve number (SCS-CN) approach can be used to measure the extent to which a rainstorm penetrates the ground and the amount of runoff that a rainstorm produces during a single storm event. the SCS-CN approach proposed by US Soil Conservation Service ( 1986) is considered the most popular because of its simplicity and suitability (Jiao et al, 2015), and it has been widely applied in hydrology and environmental studies around the world (Nagarajan and Poongothai, 2012;Zhang and Pan, 2014;Mishra and Singh, 2003;Ranjan et al, 2009). In addition, the SCS-CN method can be integrated with GIS tools for enhancing the accuracy and precision of runoff prediction (Kadam et al, 2012).…”

Section: A Methods For Measuring Land-use Effectsmentioning

confidence: 99%

A Gis-Based Procedure for Measuring the Efects of the Built Environment on Urban Flash Floods

Yan¹,

Liu²

2016

Journal of Green Building

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Urban flooding has been a severe problem for many cities around the world as it remains one of the greatest threats to the property and safety of human communities. In Australia, it is seen as the most expensive natural hazard. However, urban areas that are impervious to rainwater have been sharply increasing owing to booming construction activities and rapid urbanisation. The change in the built environment may cause more frequent and longer duration of flooding in floodprone urban regions. Thus, the flood inundation issue associated with the effects of land uses needs to be explored and developed. This research constructs a framework for modelling urban flood inundation. Different rainfall events are then designed for examining the impact on flash floods generated by land-use changes. Measurement is formulated for changes of topographical features over a real time series. Geographic Information System (GIS) technologies are then utilised to visualise the effects of land-use changes on flood inundation under different types of storms. Based on a community-based case study, the results reveal that the built environment leads to varying degrees of aggravation of urban flash floods with different storm events and a few rainwater storage units may slightly mitigate flooding extents under different storm conditions. Hence, it is recommended that the outcomes of this study could be applied to flood assessment measures for urban development and the attained results could be utilised in government planning to raise awareness of flood hazard.

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Improved SCS-CN Method Based on Storage and Depletion of Antecedent Daily Precipitation

Cited by 26 publications

References 25 publications

The Effects of Rainfall Intensities and Duration on SCS-CN Model Parameters under Simulated Rainfall

The Effects of Rainfall Intensities and Duration on SCS-CN Model Parameters under Simulated Rainfall

Hydrological Analysis of a Dyke Pumping Station for the Purpose of Improving Its Functioning Conditions

A Gis-Based Procedure for Measuring the Efects of the Built Environment on Urban Flash Floods

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