Estimation of Surface Runoff and Total Suspended Solids of Mixed Fruit Tree-based Agroforestry System As A Result of Landslides and Under Natural Succession
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Abstract
Landslides can cause frequent ecological impacts on upstream watersheds. Areas damaged by landslides accelerate the erosion process, making it more severe, which is also a main cause of soil loss induced by increasing the total suspended solids during each event. This study aimed to estimate the soil loss caused by erosion during both normal condition and 10-year landslide condition in a mixed fruit tree-based agroforestry in Maepoon sub-district, Lablae district, Uttaradit province by analyzing the correlation between rainfall and surface runoff in each rainfall event. The rainfall amounts of a single rain event were collected during the rainy season from January 2016 to October 2016. The study indicated that the amounts of surface runoff were significantly different when compared between fruit tree-based agroforestry and landslide-damaged area with an average of 1.25 mm and 2.37 mm, respectively. Soil loss was higher in landslide-damaged area compared to the mixed fruit tree-based agroforestry with a rate of 65.25 kg rai-1 year-1 or 0.408 ton ha-1 year-1. This study provides a better understanding of landslide-induced hydrological change in the upstream watersheds, which can be essential for decision making in finding the guidelines for soil erosion and sediment control in the future.
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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