国立研究開発法人 国際農林水産業研究センター | JIRCAS

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
本文フルテキスト

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.

刊行年月2005-01-01
作成者FUJIEDA MotohisaVARGAS RONA Rodrigo
著者キーワード

Forest hydrology

water budget

overland flow

afforestation

公開者Japan International Research Center for Agricultural Sciences
データ作成日2005-01-01
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
39
1
開始ページ69
終了ページ76
DOI10.6090/jarq.39.69
権利Japan International Research Center for Agricultural Sciences
言語eng