Evaluation of the Intrinsic Environment Changes Resulting from Farm Land Consolidation in a Hilled Area

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Abstract

One of the most important micrometeorological factors for agricultural production is the solar radiation. The solar radiation environment in a hilled area is very complicated because it is affected by the canopy of forest adjacent to the field, and the surface orientation. In a hilled area, land consolidation is conducted to improve the productivity and efficiency of work on cultivation. The land consolidation affects the solar radiation environment because the field orientation, including the slope and aspect, changes. The objectives of this study were quantification of the solar radiation in a hilled area, considering the temporal and spatial variations, and evaluation of the land consolidation effect on the solar radiation environment. Field observation was conducted to clarify the complicated solar radiation in a hilled area. The temporal and spatial variation of the solar radiation could be obtained as well as affects on the air temperature and humidity environment. To quantify the solar radiation, considering the temporal and spatial variations, the fish-eye figure method was adopted. The seasonal and spatial variations of the solar radiation environments were clarified by this method. To evaluate the land consolidation effect on the solar radiation environment, the spatial variation of the solar radiation is estimated, assuming that the land consolidation is conducted in a hilled area. When the land consolidation is completed, the amount of the solar radiation on the inclined surface increases, compared with the solar radiation before the land consolidation.

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