Mountainous Forest Soil Water Absorptability for Increasing Summer Water Capacity of Kaeng Krachan Storage Dam
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Abstract
Kaeng Krachan National Park It has an area of approximately 2,914.70 square kilometers. There is a fertile forest that is the watershed forest of the Phetchaburi River. During the summer, the reservoir contains only 122.11 million cubic meters of water per year. may cause drought Water shortage problem during the rainy season from winter to summer Therefore, it is worthwhile to study the soil moisture of land use, ie, evergreen forest areas. mixed forest area and agricultural areas and compare soil moisture in each forest type as well as to find the soil moisture in the height of the water in the soil Ban Pratu Phi sub-basin area Kaeng Krachan National Park Phetchaburi Province Soil samples were collected at depths of 0-15 and 15-30 centimeters during March to June 2021.
The results showed that the soil water capacity as a percentage by volume at the soil depth 0-15 cm in the mixed deciduous forest area was averaged equal to 26.54% by volume. The mean evergreen forest area was 25.91 percent by volume. and agricultural areas were averaged 28.68 percent by volume. and soil depth 15-30 cm. Mixed deciduous forest area had an average value of 24.92 percent by volume. The mean evergreen forest area was 24.48 percent by volume. The mean values for agricultural and agricultural areas were 30.14 percent by volume. Both forest types and all soil depths were not significantly different (p>0.05) and soil moisture when accounted for height of water. In the area of mixed deciduous forest in the range of 0.265-0.249 cm, in the area of moist evergreen forest in the range of 0.259-0.245 cm and in the agricultural area in the range of 0.287-0.301 cm, it can be seen that the soil moisture varies according to the soil cover factor. percentage of clay and rainfall from the study of soil moisture in Kaeng Krachan National Park Phetchaburi Province It can be used as a guideline for water resource management in the summer for the allocation of water to be beneficial and sufficient for people's needs in using water for agriculture. and consumer
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