A STUDY ON PHYSICAL FEATURE OF RIVER CHANNEL WHICH SUPPORTING THE DIVERSITY OF KINDS OF FISHES

• Published in: PROCEEDINGS OF HYDRAULIC ENGINEERING Vol. 48; pp. 1561 - 1566
• Main Authors: SUNADA, Kengo, KAWAMURA, Kazuya
• Format: Journal Article
• Language: English
• Published: Japan Society of Civil Engineers 2004
• Subjects: diversity of kinds of fishes; physical diversity of river channel; riffle-pool-shoreline
• ISSN: 0916-7374; 1884-9172
• DOI: 10.2208/prohe.48.1561

In this study, quantitative analysis on the relation between the physical diversity of river channel and the diversity of kinds of fishes has been carried out. In this paper, the authors tried to find the physical factor of river channel which had an influence effectively to preserve the diversity of kinds of fishes by increasing the rivers and areas to analyze it, in addition to the results until now. The diversity of kinds of fishes was assessed by using the Simpson's diversity index. On the other hand, the diversity of river channel was expressed by standard deviations of the channel hydraulic variables, such as water depth and flow velocity. The results of this examination showed that the diversity of kinds of fishes was secured in the area which the diversity of kinds of the young fishes was rich. And, as for the rate of the area of the shoreline, it found that it was important as well as “riffle and pool” which was important in the existent research.