First, we analysed data to determine the soil's physical properties, texture, and Hydrologic Soil Group (HSG). Then, we can interpret the hydraulic conductivity and CN value. The last step is to analyse the rel
The use of the NRCS standard table considers land use, hydrologic soil group (HSG), and antecedent moisture condition (AMC) in determining CN values. The AMC was considered from the 5-day cumulative rainfall depth grouped into three classes: AMCI (< 36 mm), AMCII (36–53 mm), and AMC...
There are some "generic" numbers in the literature and online resources (search "hydrologic soil group") that you can use as a starting point, but you really need to be careful in using them as typically they are not correct for your specific geography. Living Atlas has some good resources...
Soils are thus classified into four hydrologic soil groups (HSGs) to infer runoff potential (Table 1)11. HSG-A has the lowest runoff potential (typically contains more than 90% sand and less than 10% clay), HSG-B has moderately low runoff potential (typically contains between 10 to 20% ...
Katherine Folk ClancyCollege of Natural ResourcesJournal of Water Resource and ProtectionMiller, K. & Clancy, K. F. (2017), "Improving Curve Number Runoff Estimates Using Dual Hydrologic Soil Classification and Potential Contributing Source Areas Delineation Methods", Journal of Water Resource and ...
Bare Soil 2.302 8.63% (Impervious area)29.77% Building 5.638 21.14% Water 1.843 6.91% Total 26.67 km2 100% Table 4. Percentage of area for different Soil Classes. Soil ClassTotal area (km2)Percentage of area B 7.590476 28.46 C 18.98394 71.18 D 0.095692 0.36 Total 26.67 km2 100% Table 5...
0.599 0.815 0.841 0.479 0.673 0.737 0.817 0.671 RMSE (mm/ month) 0.01 0.02 0.04 0.07 0.15 0.18 0.2 0.21 0.23 0.26 0.29 0.31 0.31 0.32 0.32 0.36 Table 1. Selected sites for validation and their corresponding hydrologic unit number, goodness of fit and root (R2) mean square error (RMSE...
0.599 0.815 0.841 0.479 0.673 0.737 0.817 0.671 RMSE (mm/ month) 0.01 0.02 0.04 0.07 0.15 0.18 0.2 0.21 0.23 0.26 0.29 0.31 0.31 0.32 0.32 0.36 Table 1. Selected sites for validation and their corresponding hydrologic unit number, goodness of fit and root (R2) mean square error (RMSE...
Curve number (CN) is a dimensionless index used to characterize the runoff potential of a specific land area due to a given rainfall event (Deshmukh et al., 2013, Gonzalez et al., 2015, Hawkins et al., 2008, USDA, 1986). It is a function of hydrologic soil group, land use/land cov...
While accurate streamflow data necessary for hydrologic modeling still mostly requires field measurements of streamflow, producing data and information for many basin features including climate, morphology, soil conditions, land cover, etc. have become easier by remote sensing technologies (Yousefi Sohi ...