On the Growth Rate of S. Gilgiana on reservoir margin which appears in air only in summer season

Abstract

Because the water stage is seasonally varied in a reservoir for flood control, there appears unsightly non-vegetated band along the margin, which diminishes the value of a reservoir, eg, for resort use. In this paper, some basic data are presented for vegetating the bands with S. Gilgiana which is persevering to submergence. Its growth rate under the condition of flood control reservoir is estimated by a field survey in Kamafusa reservoir. The result shows that the estimated growth rate is about the half of its value under an ordinary growth condition. A consideration is made by refering to the seasonal variation of the water stage and the characteristics of seasonal growth of S. Gilgian.