Partitioning of rainfall by three Central Himalayan forests

Loshali, D. C. ; Singh, R. P. (1992) Partitioning of rainfall by three Central Himalayan forests Forest Ecology and Management, 53 (1-4). pp. 99-105. ISSN 0378-1127

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0378-1127(92)90037-A

Abstract

Throughfall, interception losses and surface run-off studies during the monsoon season (June through September) in three different forests of Central Himalaya are described. The tree canopy covers of the stands were 80.0-91.5%. Canopy throughfall (throughfall directly beneath the canopy) made up 76.5% and canopy interception loss was 23.5% of the total rainfall (1965.8 mm) during the 1985 and 1986 monsoons. Values of throughfall and interception losses computed for entire forested stands (stand throughfall and stand interception) accounted for 79.6% and 20.2% of the total rainfall. The minimum canopy throughfall (74.9%) was recorded in chir pine and maximum (78.6%) in mixed banj oak-tilonj oak forest. Stand throughfall was maximum (80.7%) in mixed banj oak-chir pine forest and minimum (77.5%) in chir pine forest. Stand interception was higher in chir pine compared with mixed banj oak-chir pine and banj oak-tilonj oak forests. The highest value of surface run-off was recorded in chir pine forest which had the lowest litter interception (8.3%). Canopy throughfall and surface run-off were positively related (P < 0.01) to bulk precipitation. The low proportion of surface run-off (0.46-0.53%) is a characteristic and a special feature of the forest ecosystems of the Central Himalaya.

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