Investigating practical alternatives to the NRCS-CN method for direct runoff estimation using slope-adjusted curve numbers

Moon, Geon-Woo; Ajmal, Muhammad; Ahn, Jae-Hyun; Kim, Tae‐Woong

doi:10.1007/s12205-016-0148-7

Cited by 8 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The LULC and HSG layers were spatially integrated, and Curve Number II (CN II) values were assigned to each LULC-HSG class based on their combination. Subsequently, CNII was converted into (CNI) and (CNIII) associated with (AMC-I) and (AMC-III) using Equations ( 1) and ( 2), respectively [32].…”

Section: Methodsmentioning

confidence: 99%

Cost-Benefit Analysis of Minor Irrigation Tank Rehabilitation Using Run-Off and Storage Capacity: A Case Study from Ambuliyar Sub-Basin, Tamil Nadu, India

Nagoor Pitchai,

Magalingam,

Rajasekaran

et al. 2024

GeoHazards

View full text Add to dashboard Cite

This research examines the significance of restoring efficient water management systems in India’s semiarid environment, with special emphasis on the role of traditional irrigation structures, such as tanks, in collecting and storing limited water resources. Assessing the benefits of any restoration program, especially when socioeconomic and environmental benefits are involved, is challenging. In the context of tank rehabilitation, a cost-benefit analysis will be conducted regarding economic and ecological returns in the post-desiltation phase. Since the restoration process requires a significant investment, assessing the project’s viability during the planning stage is better. The present study proposes a novel method to indirectly analyse the cost-benefit of the tank restoration process by correlating run-off and storage capacity of tanks before the planning phase. The Ambuliyar sub-basin, which covers an area of 930 square kilometres in Tamil Nadu, India, comprising 181 tanks (water bodies) of varying sizes and shapes, was taken for this study. This study employed the Soil Conservation Service Curve Number (SCS-CN) method, incorporating factors such as soil type, land cover, land use practices, and advanced remote sensing and Geographic Information System (GIS) tools to simulate surface run-off. Run-off volume and tank capacity were compared for all seasons at the micro-watershed level. The results demonstrated that the run-off volume in each micro-watershed significantly exceeded the tank capacity across all seasons. Even during the summer, the run-off volumes in the micro-watershed were considerably higher than the tank capacity. The findings suggest tank restoration can effectively store run-off and significantly fulfil agricultural and other essential needs throughout the year, thereby improving the local rural economy. This study also highlights the need for periodic maintenance and rehabilitation of these tank systems to retain their functionality.

show abstract

Section: Methodsmentioning

confidence: 99%

Cost-Benefit Analysis of Minor Irrigation Tank Rehabilitation Using Run-Off and Storage Capacity: A Case Study from Ambuliyar Sub-Basin, Tamil Nadu, India

Nagoor Pitchai,

Magalingam,

Rajasekaran

et al. 2024

GeoHazards

View full text Add to dashboard Cite

show abstract

“…They showed that the initial abstraction parameter was significantly different from the original one recommended by the NRCS. Moon et al [17], Ebrahimian et al [18] and Shi et al [19] conducted studies related to determining the volume of runoff, taking into account the slopes of the catchments. They found that the surface runoff determined by the NRCS-CN method with adjustment for catchment slope had values much closer to the runoff observed compared to the original method.…”

Section: Introductionmentioning

confidence: 99%

Identification of the Relationship between Rainfall and the CN Parameter in Western Carpathian Mountain Catchments in Poland

Młyński

Wałęga

2020

Sustainability

View full text Add to dashboard Cite

The aim of this study was to identify the form of the dependence describing the relationship between rainfall (P) and the curve number (CN) parameter using the Natural Resources Conservation Service (NRCS-CN) method in the mountain catchments of the Western Carpathians. The study was carried out in 28 catchments areas in the Western Carpathians in the Upper Vistula Basin, Poland. The study was conducted in the following stages: determination of the volume of the direct runoff using the NRCS-CN method, determination of the P–CN relationship using asymptotic functions, kinetic equation and complementary error function; determination of the volume of the direct runoff from the catchment area, accounting for the correction of the decline; determination of the value of the efficiency coefficient of the analysed models. On the basis of the conducted study, a strong relationship was found between the direct runoff and the rainfall that caused it. The study showed that the empirical values of the CN parameter differed from the values determined on the basis of the volume of rainfall and runoff. The vast majority of study catchments were characterised by a standard P–CN relationship. The kinetic model was found to be the best model to describe the P–CN relationship. The asymptotic model showed the greatest stability for high rainfall episodes. It was shown that the application of the catchment slope correction improved the quality of the NRCS-CN model.

show abstract

On the Role of Hydrological Losses in Estimating Event Runoff Coefficients Using the NRCS Method

Eslami

Abdollahi

Ebrahimi‬

2023

Water Resour Manage

View full text Add to dashboard Cite

Investigating practical alternatives to the NRCS-CN method for direct runoff estimation using slope-adjusted curve numbers

Cited by 8 publications

References 13 publications

Cost-Benefit Analysis of Minor Irrigation Tank Rehabilitation Using Run-Off and Storage Capacity: A Case Study from Ambuliyar Sub-Basin, Tamil Nadu, India

Cost-Benefit Analysis of Minor Irrigation Tank Rehabilitation Using Run-Off and Storage Capacity: A Case Study from Ambuliyar Sub-Basin, Tamil Nadu, India

Identification of the Relationship between Rainfall and the CN Parameter in Western Carpathian Mountain Catchments in Poland

On the Role of Hydrological Losses in Estimating Event Runoff Coefficients Using the NRCS Method

Contact Info

Product

Resources

About