TENTATIVE HYDROLOGIC SOIL CLASSIFICATION FOR TROPICAL SOILS
The Runoff Curve Number (CN) method is applied for estimating direct runoff from rainstorms. Its application is based on the selection of input CN from handbook tables of USA origin. The use of these tables is by default, insofar as CN determinations for various land use and soils have not been done for the local conditions. Soils are classified in four groups (A, B, C and D);from the lowest to the highest runoffpotential. At this point, the most difficult task is classifying a soil because the general characteristics of the hydrologic soil groups (HSGs) do not provide objective criteria for applying the method outside the USA, mainly for regions or countries where there are highly weathered soils, such as Brazil. This happens because the criteria are mainly based on soil texture, once the steady infiltration rate data or saturated hydraulic conductivity data are not always available or obtained. Thus, after reviewing the current HSGs criteria, new ones were developed based on Brazilian soils to improve accuracy and consistency in allocating tropical soils to the appropriate group.
hydrologic soil group direct runoff tropical soils
Aderson Sartori Abel Maia Genovez Francisco Lombardi Neto
FEC-UNICAMP, P.O.Box 6021 -CEP 13083-971 -Campinas, SP, Brazil IAC,P.O.Box 28 -CEP 13012-970, Campinas, SP, Brazil
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
199-204
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）