Assessment of soil water content in landslide-damaged upstream ecosystems using Soil and Water Assessment Tool (SWAT) model
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Abstract
Soil water is very important for ups tream because plants used to grow up, affect to the
health and sustainability of the ecosystem. The severe landslide occurred in 2006 at the upstream
region of Maepoon sub-district might affect soil water holding capacity. This study aimed to assess
the soil water content in the ecosystem of upstream under normal condition and after landslide
condition (10 years ago) using Soil and Water Assessment Tool (SWAT) model. The SWAT model
was calibrated and subsequently the accepted values of R2, NSE and PBIAS were 0.58 0.48 and
8.91, respectively. The results from SWAT analysis showed highest soil water in October for the
entire area, particularly in low-slope areas. A rainfall retained in soil was approximately 5.15%
(10.91 million cu.m.). The available water capacity (AWC) of almost watershed (87.20 km2) was
39.55 million m3. The highest value of mean monthly soil water content was found in mixed
deciduous forest with bamboo with 180.82 mm, followed by mixed fruit tree-based agroforestry
(174.01 mm), mixed deciduous forest with bamboo after 10-year landslide (133.18 mm) and mixed
fruit tree-based agroforestry after 10-year landslide (129.34 mm), respectively. The comparison
of two ecosystems under normal condition and after 10-year landslide condition shows that soil
water content in landslide area was lower than normal condition. The results indicate that the
landslides can decrease soil water content in this region.
Article Details
ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ขอรับรองว่า ต้นฉบับที่เสนอมานี้ยังไม่เคยได้รับการตีพิมพ์และไม่ได้อยู่ในระหว่างกระบวนการพิจารณาตีพิมพ์ลงในวารสารหรือสิ่งตีพิมพ์อื่นใด ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ยอมรับหลักเกณฑ์และเงื่อนไขการพิจารณาต้นฉบับ ทั้งยินยอมให้กองบรรณาธิการมีสิทธิ์พิจารณาและตรวจแก้ต้นฉบับได้ตามที่เห็นสมควร พร้อมนี้ขอมอบลิขสิทธิ์ผลงานที่ได้รับการตีพิมพ์ให้แก่วารสารวนศาสตร์ คณะวนศาสตร์ มหาวิทยาลัยเกษตรศาสตร์ กรณีมีการฟ้องร้องเรื่องการละเมิดลิขสิทธิ์เกี่ยวกับภาพ กราฟ ข้อความส่วนใดส่วนหนึ่ง หรือ ข้อคิดเห็นที่ปรากฏในผลงาน ให้เป็นความรับผิดชอบของข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) แต่เพียงฝ่ายเดียว และหากข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ประสงค์ถอนบทความในระหว่างกระบวนการพิจารณาของทางวารสาร ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ยินดีรับผิดชอบค่าใช้จ่ายทั้งหมดที่เกิดขึ้นในกระบวนการพิจารณาบทความนั้น”
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