Geographia Technica, No. 2/2009, pp. 1 - 10

ESTIMATION OF RUNOFF COEFFICIENT ACCORDING TO SOIL MOISTURE USING GIS TECHNIQUES

 A. I. Craciun , I. Haidu, Zs. Magyari-Saska, A. I. Imbroane

ABSTRACT: This study aims the analysis of the role that the soil water content has in evaluating the runoff in a small watershed (≈ 10km2) situated in mountain area – Stolna Basin (Apuseni Mountains). From meteorological point of view a model developed by Soil Conservation Service (SCS) from USA will be used, model that is based on hydrologic balance, by which the infiltration depth (cumulative infiltration) can be estimated. Also, the runoff depth can be estimated. In the same time, in order to obtain a spatial representation of these hydrological processes, the SCS equation will be integrated in GIS medium. So, it will be necessary, first to create a raster database for the next parameters: soil texture, hydrological soil group, slope, land use, CN index, maximum capacity of retention, loss due to interception and evapotranspiration etc. In the end, medium values of the runoff coefficient will be computed in the basin for different periods of the year.
Keywords: runoff coefficient, soil moisture, GIS, SCS method, Stolna (Apuseni Mountains)

Full article:a_i_craciun_et_colab_estimation_of_runoff_coef.pdf