Hydrological Characteristics at Hilly Catchment in a Semi-Arid Region, Chile

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
39-01-10.pdf257.61 KB

The Alto Loica experimental site was established to achieve some understanding of the hydrological characteristics and the effects of afforestation on soil and water conservation in semi-arid regions in Chile. Hydrological measurements were taken in the 16.25-ha catchment for seven years. Because of the high variability of annual rainfall, there was a drought year in which streamflow disappeared throughout the year. As the catchment contains intermittent streams, mean annual baseflow is only 5.9% of mean annual rainfall, while mean annual evapotranspiration is 62.6% of that. The seasonal fluctuations of soil moisture storage suggest that moisture conditions during the period of December through March may be the driest ones for the growth of vegetation. While Horton overland flow occurs over grassy and shrub covered hillside during high rainfall intensities, it contributes largely to sharp hydrograph peaks. During large rainstorms, the mean runoff coefficient was more than 50%. Hence, measures to reduce overland flow are required for afforestation as well as soil and water conservation.

作成者 FUJIEDA Motohisa VARGAS RONA Rodrigo

Forest hydrology

water budget

overland flow


公開者 Japan International Research Center for Agricultural Sciences
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 69
終了ページ 76
DOI 10.6090/jarq.39.69
権利 Japan International Research Center for Agricultural Sciences
言語 eng