Investigation Of The Spatial And Temporal Variation Of Sediment Yield And Surface Runoff In Offa Watershed
(A Case Study Of Kwara State)
In this research, an hydrological modelling tool, soil and water assessment tool (SWAT) used to investigate the spatial and temporal variation of sediment yield in a watershed. The model was run for 31years using spatial data such as Digital Elevation Model, soil map, land use and precipitation, wind and solar radiation. The results showed that the maximum value ofsurface Runoff was estimated as 19100.034mm in the year 2005 while the minimum surface Runoff was 1000.671mm in the year 20017. The maximum value of sediment yield was estimated as 2340.532mm in the 2005 and the minimum value was estimated as 34.769mm in the year 2003
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Title page
Certification
Dedication
Acknowledgement
Abstract
Table of content
List of Figures
CHAPTER ONE:
INTRODUCTION
1.1 Introduction 1
1.2 Problem Statement 2
1.3 Aims & Objectives 2
1.4 Justification 3
1.5 Scope of Study 3
1.6 Description of Study Area 3
CHAPTER TWO:
LITERATURE REVIEW
2.0 Literature Review 5
2.1 Sediment Source Analytical Techniques 5
2.2 Sediment Yield Measurements 6
2.3 Field Measurements of Sediment Yield 7
2.4 Sediment Yield Modeling 7
2.5 Brief Description of Selected Hydrology Models 8
2.5.1 RIBASIM 8
2.5.2 WEAP 9
2.5.3 Realm Resource Allocation Model 9
2.5.4 HSPF Model 10
2.5.5 AGNPS Model 10
2.5.6 SWAT Models 11
2.6 SWAT Model Description 11
2.7 Water Shed Hydrological Modeling. 11
CHAPTER THREE:
METHODOLOGY
3.0 Methodology 13
3.1 Model Selection and Description 13
3.2 Model Input Data 14
3.3 Digital Elevation Model (DEM) 14
3.4 Soil Map 15
3.5 Weather Data 16
3.6 SWAT Model Set-up and Run 16
3.7 Water Shed Delineation 16
3.8 Land use map of the watershed 17
CHAPTER FOUR:
RESULTS AND DISCUSSION
4.0 RESULTS 19
4.1 Temporal Variation of total means for surface runoff 19
4.2 Temporal variation of total means for sediment yield 20
4.3 Temporal variation of annual means for sediment yield 21
4.4 Temporal variation of annual means for surface runoff 21
CHAPTER FIVE:
CONCLUSION AND RECOMMENDATION
5.0 Conclusion 23
5.1 Recommendation 23
References
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