Understanding the Impact of Human Interventions on the Hydrology of Nile Basin Headwaters the Case of Upper Tekeze Catchments 1st Edition by Tesfay Gebremicael 9781000734829 100073482X

1 Introduction

1.1 Background

1.2 Hydrological processes in semi-arid catchments

1.3 Impact of catchment management dynamics on hydrological processes

1.4 Hydrological modelling

1.5 Problem Statement

1.6 Research Objectives

1.7 Structure of the thesis

2 Study area description

2.1 Location and topography

2.2 Climate

2.3 Land use

2.4 Soil and geological information

2.5 Soil and Water conservation interventions

2.6 Water resources

3 Evaluation of satellite products in the Upper Tekeze basin

3.1 Introduction

3.2 Data and methods

3.2.1 Rain gauge data

3.2.2 Satellite rainfall products

3.2.3 Evaluation and Validation processes

3.2.4 Evaluation statistics

3.3 Result and Discussions

3.3.1 Comparison at pixel-to-point spatial scale

3.3.2 Comparison based on areal averaged rainfall

3.4 Conclusions and Recommendations

4 Temporal and spatial changes of rainfall and streamflow

4.1 Introduction

4.2 Data and methods

4.2.1 Rainfall data

4.2.2 Streamflow data

4.2.3 Trend analyses method

4.2.4 Change point detection method

4.2.5 Hydrological alteration indicators

4.3 Results and discussion

4.3.1 Rainfall variability over the Upper Tekeze basin

4.3.2 Streamflow variability in the basin

4.3.3 Analysis of hydrological variability using IHA method

4.3.4 Drivers for streamflow variabilities

4.4 Conclusion and Recommendations

5 Quantifying longitudinal land use/cover change in Geba catchment

5.1 Introduction

5.2 Study area description

5.3 Data and methods

5.3.1 Data acquisition

5.3.2 Image pre-processing

5.3.3 Image classifications, accuracy assessments and post classifications

5.4 Result and Discussion

5.4.1 Classification and change detection

5.4.2 Possible drivers of the land use/cover changes

5.4.3 Effects of watershed management interventions on the LULC patterns

5.5 Conclusion and recommendations

6 Modelling hydrological response to land management dynamics

6.1 Introduction

6.2 Data and Methods

6.2.1 Dynamic inpute datasets

6.2.2 Methods

6.3 Result and Discussion

6.3.1 Calibration and validation of the Wflow hydrological model

6.3.2 Streamflow responses to LULC changes

6.3.3 Hydrological alteration trends in response to the observed LULC changes

6.3.4 Hydrological impacts of individual land use/land cover changes

6.4 Conclusion and recommendations

7 Modelling the impact of catchment management interventions on the low flows

7.1 Introduction

7.2 Study area description

7.3 Data and methods

7.3.1 Static dataset

7.3.2 Dynamic datasets

7.3.3 Methods

7.4 Result and discussion

7.4.1 Comparison of change in streamflow

7.4.2 Model calibration and validation

7.4.3 Comparison of water budget of the paired catchments

7.4.4 Model to model comparison approach

7.4.5 Comparison of model parameters between the paired catchments

7.5 Conclusion and recommendations

8 Conclusion and recommendations

8.1 Conclusion

8.2 Recommendations