Abstract
Project for agricultural infrastructure improvement and rural development which has been improved the productivity and surroundings of rural daily life. Recently, it has been pointed out that the project brought considerable profit but at the same time caused damage to the ecology of the local environment. And the project seemed to enter a turning point with the amending of a related law.
In this background, a clustery field of wild iris where preservation works were carried out as part of farmland consolidation became the subject of this study, and observation on the water balance was made.
The results showed that the sum of the loss of water estimated from the difference of water level at a swamp which is a part of the field and calculated from the income and outgo of water was for 40 to 50 mm, and the loss amount of water from the field was little as a quantity for 6 months.
