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A study on irrigation ponds in Higashi-Hiroshima: A statistical approach



A study on irrigation ponds in Higashi-Hiroshima: A statistical approach



Journal of the Faculty of Applied Biological Science Hiroshima University 35(1): 27-34



Irrigation ponds in Hiroshima prefecture reach about 21,000 which is the second large number in the whole country. A quarter of irrigation ponds in Hiroshima prefecture concentrates in Higashi-Hiroshima city and its environs, however there are few reports about on the actual conditions of these irrigation ponds. The purpose of this paper is to clear the statistical trends on the actual conditions of irrigation ponds by the use of the data surveyed about irrigation ponds in Higashi-Hiroshima city. The total number of irrigation ponds in Higashi-Hiroshima city are 2,182. These are mainly common or individual ponds and so small size. The average size of an irrigation pond is 4,022 m-3. The average area of beneficiary is 3.36 ha and the average number of beneficiary farmhouses are about 9. We confirm that there are noticeable differences among four towns in the city about the actual conditions of irrigation ponds in Higashi-Hiroshima city, and the strongest correlations is observed between the conditions of irrigation ponds and capabilities of the operators. Especially the deterioration of individual ponds is remarkable observed.

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Accession: 008080899

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