砂防堰堤の形式が河床の礫径及び植物種に与える影響について
キーワード:
Concrete slit Sabo dam,
Concrete closed-type Sabo dam,
Impacts of Sabo dams,
Structure of a dry riverbed
2010 年 16 巻 p. 191-196
詳細
2010 年 16 巻 p. 191-196
This paper summarizes field survey on physical features of and vegetation on a dry riverbed around Sabo dams (check dams) in Ozo river. The investigated zones are 120m long in upstream and downstream of a concrete slit Sabo dam and two concrete closed-type Sabo dams. Unit size of a survey mesh is 10m and 5m in longitudinal and transverse directions, respectively.
Frequency distributions of cobble diameter and number of plant species for a slit Sabo dam are clarified to be similar by a significant difference analysis on samples in upstream and downstream zones. It is also confirmed that continuity of sediment transport is sufficiently high for a slit Sabo dam by the distribution of Boehmeria sylvestris which is typical species in deposit by slope failure.
