Soil Conservation Service Curve Number (SCS-CN) Method Current Applications, Remaining Challenges, and Future Perspectives

Changes in land use in the Cikapundung watershed, ie changes in forest land to built-up land, have an impact on the quantity of river water. Changes in land use in the Cikapundung River catchment are not ideal conditions for absorbing water. If land conversion is not controlled, it can have a large impact on reducing the availability of water resources for subordinate areas or what is called water scarcity. Analysis that takes into account land use and discharge can be done with several hydrological analysis methods, one of them is the Soil Conservation Service Curve Number (SCS-CN) method. Based on the calculation, the CN value was changed in 2014 from 57.275 to 62.591 where land cover changes began to occur. Keywords: land use, river water, water scarcity, hydrology, CN value

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ASSESSING THE IMPACT OF URBANIZATION ON DIRECT RUNOFF IN DISTRICT 8, HO CHI MINH CITY

URBAN CONSTRUCTION AND ARCHITECTURE ◽

10.17673/vestnik.2021.03.20 ◽

2021 ◽

Vol 11 (3) ◽

pp. 145-156

Author(s):

Van Minh NGUYEN ◽

Elena Yurievna ZAYKOVA

Keyword(s):

Remote Sensing ◽

Surface Runoff ◽

Soil Conservation ◽

Curve Number ◽

Ho Chi Minh City ◽

Soil Conservation Service ◽

Impact Of Urbanization ◽

Service Curve ◽

The Impact ◽

Scs Cn

Ho Chi Minh City (HCMC) is among the cities that are most at risk of fl ooding worldwide. Urbanization processes have led to a change in land use, which in turn has resulted in an increase in impervious surfaces and runoff , thus again leading to the risk of fl ooding in the city. The aim of the article is to study the impact of urban development (on the example of District 8 of HCMC) on surface runoff using a combination of the interpretation of remote sensing images of the earth (ERS) Google Earth and the SCS-CN model (the Soil Conservation Service curve number). Theoretical models are used to analyze the relationship between the typology of buildings and areas of open and impervious surfaces. The interpretation of remote sensing images was carried out in the ArcGIS program. The method used to calculate surface runoff is the Soil Conservation Service Curve Number (SCS-CN) method developed by the US Soil Conservation Service and is suitable for assessing the eff ects of land-use/land cover change due to urbanization. The results of the study show the volume of surface runoff in areas with diff erent levels of urbanization in district 8 of HCMC, assessing the impact of urbanization processes on surface runoff and revealing new opportunities for managing this process. The combination of remote sensing interpretation and SCS-CN model makes it possible to assess the impact of urban development on surface runoff . Urbanization and an increase in built-up area strongly aff ect fl ooding, reducing the soil retention.

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An updated hydrological review on recent advancements in soil conservation service-curve number technique

Journal of Water and Climate Change ◽

10.2166/wcc.2010.022 ◽

2010 ◽

Vol 1 (2) ◽

pp. 118-134 ◽

Cited By ~ 12

Author(s):

P. K. Singh ◽

M. L. Gaur ◽

S. K. Mishra ◽

S. S. Rawat

Keyword(s):

Soil Conservation ◽

Curve Number ◽

Estimation Methods ◽

Soil Conservation Service ◽

Hydrologic Models ◽

Relative Significance ◽

Storm Rainfall ◽

Service Curve ◽

Hydrology And Water Resources ◽

Scs Cn

Although many hydrologic models are available for the estimation of direct runoff from storm rainfall, most models are limited because of their intensive input data and calibration requirements. The Soil Conservation Service-Curve Number (SCS-CN) technique has been applied successfully throughout the entire spectrum of hydrology and water resources, even though originally it was not intended to deal with and solve certain issues such as erosion and sedimentation and environmental engineering. This manuscript includes an updated review of this popular technique with its critical performance analysis under various hydrological applications. The study highlights its provenance and its conceptual and empirical foundations followed by relative significance of the parameter CN and various estimation methods and issues related to the Ia and S relationship. Finally, notable recent advancements available in the literature are discussed for their structural strengths and applicability in real world problems.

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A Historical Review of Slope Based SCS Method and its Effect on CN and Runoff Potential Globally

10.20944/preprints202010.0024.v1 ◽

2020 ◽

Author(s):

Tauseef Ahmad Ansari ◽

Yashwant B Katpatal ◽

C Rishma

Keyword(s):

Soil Conservation ◽

Historical Review ◽

Curve Number ◽

Soil Conservation Service ◽

Moisture Condition ◽

Antecedent Moisture ◽

Runoff Potential ◽

Service Curve ◽

Scs Cn ◽

Large Catchment

The Soil Conservation Service - Curve Number (SCS-CN) method is extensively used to calculate the runoff from rainfall over a large catchment over the world. Slope is an important criterion for runoff but a very few attempts have been made to evaluate the effect of slope on the CN with runoff potential. The objective of this paper is to summarise the historical review on the effects of slope on CN and runoff potential in various regions by the hydrologists. This paper also depicts that how the various researchers proved the importance of consideration of slope for CN and runoff estimation. In addition, paper highlights the key features of research in future like to classify the watersheds on slope based CN, accurate Antecedent Moisture Condition (AMC) and proper initial abstraction in the various regions etc. Considering these parameters an accurate runoff estimation can be predicted and managed properly in the urban watersheds.

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