Change in water yield accompanying growth of planting trees -Progress of 7 years after cutting in Fukuroyamasawa watershed, Chiba, Japan-

Abstract

A forest clear-cutting experiment was conducted in Fukuroyamasawa Watershed in University Forest in Chiba, The University of Tokyo, Japan. The watershed is located in a Tertiary formation area and is covered by a mixed plantation of Sugi (Cryptomeria japonica) and Hinoki ( Chamaecyparis obtusa). Trees of the same spieces was planted next year after cutting. The annual precipitation and annual mean temperature are 2200 mm and 14 degree C , respectively. Area of the watershed is about 1 ha. We analized the change in water yield accompanying growth of planting trees. By 7th year after planting, the trees was grown largely, but the change in water yield was not found.