Page 8 - ต้นแบบอนุรักษ์ดินและน้ำจังหวัดเชียงใหม่ Soil and Water Conservation Model in Chiang Mai Province.

ห้องสมุดกรมพัฒนาที่ดิน

Abstract

From October 2015 to September 2020, the Paired Watershed project was implemented

in the Mae Poi and Huai Luek sub-basins of Chiang Dao district in Chiang Mai Province. The

standard soil erosion plot sites are 4 x 22 meters in size and are installed in three slope classes:
9-10 percent, 20-25 percent, and 30-35 percent. Both sub-basins are made up of six parcels of

land that are used differently. The objective is to assess the impact of soil erosion using an
empirical aspect mathematics equation and MMF soil erosion modeling.

At Mae Poi and Huai Luek sub basins, the maximum average annual rainfall was 5,297.60

mm in 2017, whereas the lowest average annual rainfall was 1,085.60 mm in 2020. Huai Luek sub

basin has a greater quantity of soil sediment box than Mae Poi sub basin, which has 2,357.87
kg/rai or soil erosion class 0.79 ton/rai/year and Mae Poi sub basin has 1,912.68 kg/rai or soil

erosion class 0.79 ton/rai/year. The greatest soil sedimentation rate in a vegetable plot is 1.17

ton/rai/year. The natural Mixed Deciduous Forest, on the other hand, has the lowest soil
sediment level at 0.27 ton/rai/year. In addition, the mathematics equation generates a soil erosion

class of 0.20 ton/rai/year, as defined by the Land Development Department in 2013. Furthermore,

MMF modeling predicts 3.05 tons per rai per year in the Mae Poi sub-basin and 1.78 tons per rai
per year in the Huai Luek sub-basin. According to the following, the MMF model's soil erosion

evaluation includes both empirical and mathematical equations of soil erosion in the same
direction.