Assessment of land degradation patterns in western Kenya: implications for restoration and rehabilitation
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis Book |
| Language: | English |
| Published: |
Bonn
ZEF
2013
|
| Series: | Ecology and Development Series
91 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Item Description: | Weitere Ausgabe: Online-Ausg.: As: Asessment of land degradation patterns in western Kenya |
| Physical Description: | 203 S. Ill., graph. Darst., Kt. |
| ISBN: | 9783940124449 |
Staff View
MARC
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| 245 | 1 | 0 | |a Assessment of land degradation patterns in western Kenya |b implications for restoration and rehabilitation |c Boaz Shaban Waswa. [ZEF, Zentrum für Entwicklungsforschung, Bonn] |
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| 490 | 1 | |a Ecology and Development Series |v 91 | |
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| 502 | |a Zugl.: Bonn, Univ., Diss., 2012 | ||
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Record in the Search Index
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| adam_text | TABLE OF CONTENTS
1 INTRODUCTION 1
1.1 GENERAL 1
1.2 OBJECTIVES 4
1.3 THESIS LAYOUT 5
2 BACKGROUND 6
2.1 CHALLENGES OF MEETING AFRICA S FOOD DEMAND 6
2.2 LAND DEGRADATION IN PERSPECTIVE 6
2.3 LAND DEGRADATION PROCESSES 7
2.4 LAND DEGRADATION DRIVERS, PRESSURES, TYPES AND INDICATORS 7
2.4.1 DIRECT DRIVERS (PRESSURES) 7
2.4.2 INDIRECT DRIVERS 8
2.4.3 TYPES OF LAND DEGRADATION 10
2.4.4 INDICATORS OF LAND DEGRADATION 12
2.5 LAND USE AND LAND COVER (LULC) CHANGE AND DEGRADATION 13
2.5.1 ASSESSMENT OF LULC CHANGE 14
2.6 LAND DEGRADATION ASSESSMENT 16
2.7 MEASUREMENT OF LAND DEGRADATION 17
2.7.1 DIRECT FIELD MEASUREMENTS 17
2.7.2 GEOSPATIAL REMOTE SENSING TECHNIQUE 17
2.7.3 RADIONUCLIDES AND LAND DEGRADATION 18
2.7.4 MODELING 19
2.8 RAPID SOIL ANALYSIS
TECHNIQUES 19
2.9 THEORETICAL FRAMEWORK OF LAND DEGRADATION ASSESSMENT 20
3 STUDY AREA AND GENERAL
METHODOLOGY 23
3.1 KENYA IN PERSPECTIVE 23
3.2 STUDY AREA 25
3.2.1 LOCATION OF THE STUDY AREA AND RATIONAL FOR SITE SELECTION 25
3.2.2 AGRO ECOLOGY 26
3.2.3 SOILS 26
3.2.4 POPULATION 26
3.2.5 ECONOMY 27
3.2.6 RATIONAL FOR SITE SELECTION 28
HTTP://D-NB.INFO/1045398926
3.3 GENERAL METHODOLOGY 29
3.3.1 DESCRIPTION OF THE LAND DEGRADATION ASSESSMENT APPROACH 29
3.3.2 DATA ANALYSIS 34
4 MAPPING LAND DEGRADATION PATTERNS USING NORMALIZED DIFFERENCE
VEGETATION INDEX (NDVI) AS A PROXY 35
4.1 INTRODUCTION 35
4.2 METHODOLOGY 38
4.3 RESULTS 42
4.3.1 VARIATION IN PRECIPITATION AND NDVI AT COUNTRY LEVEL 44
4.3.2 CORRELATION BETWEEN BIOMASS (NDVI) AND INTER-ANNUAL RAINFALL 44
4.3.3 PIXEL-BASED LINEAR SLOPE OF INTER-ANNUAL NDVI 47
4.3.4 VEGETATION CHANGES BASED ON NDVI DIFFERENCING 49
4.3.5 NDVI AND LAND
DEGRADATION PATTERNS FOR SELECTED DISTRICTS IN WESTERN
KENYA 52
4.4 DISCUSSION 56
4.5 CONCLUSION 61
5 LAND USE LAND COVER (LULC) CHANGE AND IMPLICATIONS FOR LAND
DEGRADATION 63
5.1 INTRODUCTION 63
5.2 STUDY AREA AND DESCRIPTION 65
5.3 MATERIALS AND METHODS 67
5.3.1 IMAGE PRE-PROCESSING 68
5.3.2 COMPUTATION OF NDVI 69
5.3.3 IMAGE CLASSIFICATION 70
5.3.4 IMAGE POST-CLASSIFICATION 72
5.4 RESULTS 75
5.4.1 LAND COVER CHANGE CLASSIFICATION BASED NDVI VALUES 75
5.4.2 LAND USE LAND COVER CHANGE CLASSIFICATION BASED SUPERVISED AND
UNSUPERVISED
CLASSIFICATION 77
5.5 DISCUSSION 79
5.5.1 CLASSIFICATION BASED ON NDVI 79
5.5.2 CLASSIFICATION BASED ON LANDSAT IMAGE BAND COMBINATION 80
5.6 CONCLUSION 82
6 EVALUATING INDICATORS OF LAND DEGRADATION
IN SMALLHOLDER
FARMING SYSTEMS OF WESTERN KENYA 83
6.1 INTRODUCTION 83
6.2 METHODOLOGY 86
6.2.1 STUDY AREA AND SAMPLING FRAMEWORK 86
6.2.2 PLOT AND SUB-PLOT LEVEL MEASUREMENTS 88
6.2.3 LAND DEGRADATION INDICATOR AND ATTRIBUTE MAPPING 89
6.2.4 SOIL SAMPLING AND ANALYSIS 90
6.2.5 DATA ANALYSIS 92
6.3 RESULTS 93
6.3.1 ATTRIBUTES AND INDICATORS OF LAND DEGRADATION 93
6.3.2 VARIATION IN SOIL PROPERTIES IN MALAVA BLOCK 98
6.3.3 PRINCIPAL COMPONENTS ANALYSIS (PCA) OF SOIL PROPERTIES 106
6.4 DISCUSSION 109
6.5 CONCLUSIONS 112
7 POTENTIAL NUTRIENT SUPPLY,
UPTAKE AND CROP PRODUCTIVITY IN
SMALLHOLDER CROPPING SYSTEMS OF WESTERN KENYA 113
7.1 INTRODUCTION 113
7.2 METHODOLOGY 116
7.2.1 STUDY AREA 116
7.2.2 SOIL SAMPLING AND ANALYSIS 116
7.2.3 INTERPRETATION OF THE SOIL CHEMICAL PROPERTIES 117
7.2.4 PREDICTING NUTRIENT SUPPLY, UPTAKE, YIELD GAP AND PRODUCTIVITY
USING
QUEFTS 119
7.2.5 STATISTICAL ANALYSIS 122
7.3 RESULTS 122
7.3.1 INTERPRETATION OF THRESHOLD VALUES OF SOIL CHEMICAL PROPERTIES 122
7.3.2 PREDICTION OF NUTRIENT SUPPLY, UPTAKE AND PRODUCTION POTENTIAL
UNDER HIGH,
MEDIUM AND LOW SOIL FERTILITY 124
7.4 DISCUSSION 130
7.5 CONCLUSIONS 134
8 LAND DEGRADATION FROM THE LAND USERS PERSPECTIVE: A CASE OF
WESTERN KENYA 136
8.1 INTRODUCTION 136
8.2 METHODOLOGY 137
8.2.1 DESCRIPTION OF STUDY AREA 137
8.2.2 SURVEY 137
8.2.3 DATA ANALYSIS 138
8.3 RESULTS 138
8.3.1 HOUSEHOLD SOCIO-ECONOMIC CHARACTERISTICS 138
8.3.2 PERCEPTION OF CHANGES IN LAND PRODUCTIVITY 143
8.3.3 TYPES OF LAND DEGRADATION 144
8.3.4 CAUSES OF DEGRADATION 145
8.3.5 VULNERABILITY OF THE HOUSEHOLD TO IMPACTS OF LAND DEGRADATION 145
8.3.6 SOIL AND WATER MANAGEMENT TECHNOLOGIES 147
8.4 DISCUSSION 147
8.4.1 IMPLICATION OF HOUSEHOLD CHARACTERISTICS ON LAND DEGRADATION 147
8.4.2 PERCEPTION OF LAND DEGRADATION 151
8.4.3 DIRECT CAUSES OF LAND DEGRADATION 152
8.4.4 INDIRECT CAUSES OF LAND DEGRADATION 154
8.4.5 VULNERABILITY AND ADAPTING TO LAND DEGRADATION 156
8.5 CONCLUSIONS 157
9 SYNTHESIS AND CONCLUSION 159
9.1 INTRODUCTION 159
9.2 MAJOR FINDINGS 159
9.2.1 MAPPING LAND DEGRADATION PATTERNS 159
9.2.2 LAND USE LAND COVER CHANGE 160
9.2.3 EVALUATING INDICATORS OF LAND DEGRADATION 161
9.2.4 IMPLICATION OF LAND DEGRADATION ON LAND USERS 162
9.3 RESEARCH AND POLICY IMPLICATIONS 163
10 REFERENCES 165
11 APPENDICES 191
ACKNOWLEDGEMENT
|
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| geographic_facet | Kenia Ost |
| id | DE-604.BV041566233 |
| illustrated | Illustrated |
| indexdate | 2024-07-10T00:59:46Z |
| institution | BVB |
| isbn | 9783940124449 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-027011737 |
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| physical | 203 S. Ill., graph. Darst., Kt. |
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| series | Ecology and Development Series |
| series2 | Ecology and Development Series |
| spelling | Waswa, Boaz Shaban Verfasser (DE-588)102953683X aut Assessment of land degradation patterns in western Kenya implications for restoration and rehabilitation Boaz Shaban Waswa. [ZEF, Zentrum für Entwicklungsforschung, Bonn] Bonn ZEF 2013 203 S. Ill., graph. Darst., Kt. txt rdacontent n rdamedia nc rdacarrier Ecology and Development Series 91 Weitere Ausgabe: Online-Ausg.: As: Asessment of land degradation patterns in western Kenya Zugl.: Bonn, Univ., Diss., 2012 Vegetation (DE-588)4187458-4 gnd rswk-swf Degradation (DE-588)4200268-0 gnd rswk-swf Kenia Ost (DE-588)4352342-0 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Degradation (DE-588)4200268-0 s Vegetation (DE-588)4187458-4 s Kenia Ost (DE-588)4352342-0 g DE-604 Ecology and Development Series 91 (DE-604)BV015679114 91 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027011737&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Waswa, Boaz Shaban Assessment of land degradation patterns in western Kenya implications for restoration and rehabilitation Ecology and Development Series Vegetation (DE-588)4187458-4 gnd Degradation (DE-588)4200268-0 gnd |
| subject_GND | (DE-588)4187458-4 (DE-588)4200268-0 (DE-588)4352342-0 (DE-588)4113937-9 |
| title | Assessment of land degradation patterns in western Kenya implications for restoration and rehabilitation |
| title_auth | Assessment of land degradation patterns in western Kenya implications for restoration and rehabilitation |
| title_exact_search | Assessment of land degradation patterns in western Kenya implications for restoration and rehabilitation |
| title_full | Assessment of land degradation patterns in western Kenya implications for restoration and rehabilitation Boaz Shaban Waswa. [ZEF, Zentrum für Entwicklungsforschung, Bonn] |
| title_fullStr | Assessment of land degradation patterns in western Kenya implications for restoration and rehabilitation Boaz Shaban Waswa. [ZEF, Zentrum für Entwicklungsforschung, Bonn] |
| title_full_unstemmed | Assessment of land degradation patterns in western Kenya implications for restoration and rehabilitation Boaz Shaban Waswa. [ZEF, Zentrum für Entwicklungsforschung, Bonn] |
| title_short | Assessment of land degradation patterns in western Kenya |
| title_sort | assessment of land degradation patterns in western kenya implications for restoration and rehabilitation |
| title_sub | implications for restoration and rehabilitation |
| topic | Vegetation (DE-588)4187458-4 gnd Degradation (DE-588)4200268-0 gnd |
| topic_facet | Vegetation Degradation Kenia Ost Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027011737&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV015679114 |
| work_keys_str_mv | AT waswaboazshaban assessmentoflanddegradationpatternsinwesternkenyaimplicationsforrestorationandrehabilitation |