Nguyen Kim Loi1, Tran Thong Nhat1, Tran Le Nhu Quynh1, APPLICATION OF SWAT MODEL TO ASSESS SUB-WATERSHED IN NGHIA TRUNG, BINH PHUOC, VIET NAM Nguyen Kim Loi1, Tran Thong Nhat1, Tran Le Nhu Quynh1, Dang Thanh Ha1, Manuel Reyes2, Raghavan Srinivasan3 1Nong Lam University, HCMC, Vietnam 2North Carolina A&T State University (NCA&TSU), Greensboro, NC 27411, USA 3Texas A&M University, College Station, TX 77845, USA Presented on SWAT-SEA Conference on Jan 7-8, 2009 in ChiangMai, Thailand

Content Introduction Study area Data Methodology Results Suggestions References Mr. Tran Thong Nhat 5/19/2018

Introduction A part of the SANREM CRSP “Agroforestry and Sustainable Vegetable Production in Southeast Asia Watersheds” project Coordination: North Carolina A&T State University Research team: Nong Lam University Mr. Tran Thong Nhat 5/19/2018

Justification The rapid increase of population The needs for economic growth Land use changes within the watershed Pursuing integrated optimal planning The sustainable uses of these watershed resources The optimal balance between economic development and environmental quality within a watershed Mr. Tran Thong Nhat 5/19/2018

Objectives The research attempts to solve sediment yield through the SWAT To provide decision makers with a scientific tool for supporting them in making decisions on reservation of water and soil resources To assess the impact of land use practices to sediment yield To make policy recommendations to policy maker on land use change impact to sediment yield Mr. Tran Thong Nhat 5/19/2018

Study Area Mr. Tran Thong Nhat 5/19/2018

Methodology SWAT Scenario 2 Scenario 1 LU: Agroforestry LU: Existing Land use Scenario 2 LU: Agroforestry System Comparation Suggestions to DM Mr. Tran Thong Nhat 5/19/2018

Overlay for HRU definition Sub-watershed delineation SWAT Soil parameters Landuse parameters Climate data Results SWAT Overlay for HRU definition ArcSWAT Interface Sub-watershed delineation DEM Drainage Network Soil Map RS Image Image Classification GIS Data Landuse Map SWAT Model in Nghia Trung Sub – Watershed, Vietnam Mr. Tran Thong Nhat 5/19/2018

Data – Topo Mr. Tran Thong Nhat 5/19/2018

Watershed Mr. Tran Thong Nhat 5/19/2018

Overlay – HRU Mr. Tran Thong Nhat 5/19/2018

Climate data Mr. Tran Thong Nhat 5/19/2018 ID NAME XPR YPR 1 DongPhu 725358.610 1280230.098 2 BuDang 737405.902 1286440.042 3 PhuocLong 721881.041 1295630.759 Mr. Tran Thong Nhat 5/19/2018

Soil parameters Mr. Tran Thong Nhat 5/19/2018

LU Types Scenario 1: Existing Landuse Scenario 2: Agroforestry System VALUE LANDSUE 19 ARGL 41 URBN 52 URLD 55 WATR VALUE LANDSUE 20 FRST 41 URBN 52 URLD 55 WATR Mr. Tran Thong Nhat 5/19/2018

Set up SWAT Mr. Tran Thong Nhat 5/19/2018

Results Scenarios Sed Yield (Ton/ha) Surf Q (mm) 1: ARGL 295.31 985.11 2: FRST 27.80 705.38  Scenario 2 better than Scenario 1 Mr. Tran Thong Nhat 5/19/2018

Suggestions Should measure observed data for calibration Need collecting more data for more perfect research Water qualitiy Soil quality Mr. Tran Thong Nhat 5/19/2018

References 1. Stan Aronoff, 2005, Remote Sensing for GIS Managers, ESRI Press 2. Canadian Centre for Remote Sensing, 2007, Fundmentals of Remote Sensing, http://www.ccrs.nrcan.gc.ca/resource/tutor/fundam/index_e.php, July 04 2007 3. Zhilin Li, et. al, 2005, Digital Terrain Modeling, Principles and Methodology, CRC Press 4. S.L. Neitsch, et. al, 2004, Soil and Water Assessment Tool, Input/Output File Documentation 5. M. Winchell, et. al, 2007, ArcSWAT Interface for SWAT2005, User’s Guide Mr. Tran Thong Nhat 5/19/2018

THANK YOU FOR ATTENTION Mr. Tran Thong Nhat 5/19/2018