Abstract
In Kagawa Prefecture, rivers are so few and water generally so scarce that the bulk of the water for irrigation is supplied by artificial ponds, namely, irrigation ponds, of which there are at present more than 17000 forming, it is said, 6.3 percent of the total ricefield area. As a result, this province greatly suffers from drought from time to time.
The drought of 1934 was a record-breaker, so the writer made a study of the following subjects relating to dry-weather and its consequent damage.
(a) Geographical distribution of regions of good and bad harvest.
(b) The correlation coefficients between the elements of climate and harvest.
(c) The relation between rain-fall and harvest.
(d) A chronological list of droughts and thier periodicity.
(e) Lastly, as already mentioned, because this province has suffered from drought since olden times, there are many temples, shrines, and other historical relics connected with the supplications for rain, besides numerous legends, etc., which the writer gathered from various literatures, supple mented by detailed descriptions of the irrigation disputes, the condition of the ponds, etc. in 1934.
