Assessment of soil erosion and sedimentation : a case study of Kalaw Chaung sub-watershed of Inle lake in Myanmar

Name: Zaw, Nan Win

Organization : Mae Fah Luang University

keyword: Soil erosion

LCSH: Soil erosion -- Myanmar

Classification :.LCCS: S625

Abstract: This study was focused on the changes of land use and land cover (LULC) and soil erosion in the Kalaw Chaung Sub-watershed of Inle Lake which is located in the Nyaung Shwe Township, Taunggyi District, Southern Shan State, Myanmar. The study area covered about 485.42 km2 of the whole watershed of Inle Lake. The objectives of this research are to analyze and understand LULC patterns of the study area and to analyze LULC magnitude and trend of changes between 1990, 2000 and 2010, and to calculate the annual soil erosion rate from the study area. Geographic Information System (GIS) and Remote Sensing (RS) provide as useful tools in the investigation of LULC patterns and the detection of LULC changes over space and time. All Landsat images (1990 TM, 2000 ETM and 2010 ETM) are rectified and registered in Universal Transverse Mercator (UTM) zone 47 N. Unsupervised and Supervised classification system was carried out to classify the images in different land use and land cover categories. The classification has been identified five land use classes: Agriculture land, Close forest, Open forest, Scrub grass land and Water body. The Revised Universal Soil Loss Equation was applied to estimate the annual soil loss from the study area in 1990, 2000 and 2010. The rainfall erosivity (R) factor was calculated from the monthly rainfall data that was collected from Department of Meteorological, Taunggyi, Southern Shan State. The soil erodibility (K) factor was calculated by using the vector soil data and soil parameters collected from Land Use Department, Yangon. The slope length and steepness (LS) factor derived from 30 m resolution DEM image. The crop-management (C) factor and the support practice (P) factor were calculated from the land use and Normalized Difference Vegetation Index (NDVI) data. Then, using RUSLE, the annual soil loss was calculated and the grades of soil loss namely very low, low, moderate, high and extreme was determined. According to the study of this research, there were major changes in open forest and agriculture land. Open forest had been reduced up to 39.64% between year 1990 and 2000 and Scrub grass land had been increased up to 35.80%. On the other hand, during 2000 and 2010, agriculture area was highly increased up to 50.44% and open forest was decreased up to 21.51% due to slash burns or shifting cultivation. The results show that during the period 2010, 71.26% of the whole watershed was extremely soil erosion potential zone and 25% of the watershed area is found out to be under slight erosion class. The results of this research are going to provide reference for soil conservation and management in this area.

Mae Fah Luang University. The Learning Resources and Education Media Center

Address: Chiang Rai

Email: library@mfu.ac.th

Name: Apisom Intralawan

Role: Advisor

Created: 2013

Issued: 2015

Modified: 2020-04-03

Issued: 2015-10-05

วิทยานิพนธ์/Thesis

application/pdf

CallNumber: Thesis S625 Z395a 2013

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Natural Resources and Environmental Management

Grantor: Mae Fah Luang University

©copyrights Mae Fah Luang University

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