Design of a geographic information supported database for the management of pressurised irrigation systems at the plantation du Haut Penja, Cameroon

• ABSTRACT
  
• RESUME
  
  • 1.1 Background of the Study
    
  • 1.2 Problem Statement
    
  • 1.3 Objectives of the Study
    
  • 1.4 Importance of the Study.
    
  • 2.1 Banana
    
  • 2.1.1 Introduction
    
  • 2.1.2 Ecology
    
  • 2.2 Definition of some Terms and Concepts related to Irrigation
    
  • 2.3 Evapotranspiration
    
  • 2.3.1 Measurement of evapotranspiration
    
  • 2.3.2 The Penman-Montheith equation
    
  • 2.3.3 Meteorological factors determining evapotranspiration
    
  • 2.4 Maximum Production
    
  • 2.5 Pressurized Irrigation Systems 2.5.1 Sprinkler irrigation systems
    
  • 2.6 Irrigation Scheduling and Management 2.6.1 Irrigation management
    
  • 2.6.3 Importance of irrigation scheduling
    
  • 2.7 Geographic Information Systems
    
  • 2.7.1 Data acquisition and representation
    
  • 2.7.2 Advantages and disadvantages of vector and raster data
    
  • 2.7.3 Steps used for the putting in place of a GIS project
    
  • 2.8 Databases
    
  • 2.8.1 Database management systems
    
  • 2.8.2 Relational databases
    
  • 3.1 Description of the Study Area and Experimental Site 3.1.1 Geographical Location
    
  • 3.1.2 Relief
    
  • 3.1.3 Hydrology
    
  • 3.1.5 Vegetation
    
  • 3.1.6 Climate
    
  • 3.2 Description of the Irrigation System at the PHP Group
    
  • 3.2.1 Pumping station
    
  • 3.2.2 The main line (Pipes)
    
  • 3.2.3 Distribution network
    
  • 3.3 Development of the Database for the Irrigation System
    
  • 3.3.2 Entity and attribute identification
    
  • 3.3.4 Definition of relationships and referential integrity
    
  • 3.4 Development of thematic layers for the GIS
    
  • 3.5 Calculation of the water requirements in each plot 3.5.1 System requirements
    
  • 3.6 Evaluation of the Functioning of the Network
    
  • 3.6.1 Calculation of flow rates
    
  • 3.6.2 Calculation of flow velocity and head losses.
    
  • 3.6.3 Determination of available and required pressures
    
  • 3.6.4 Calculation of piezometric elevations
    
  • 3.7 Spatial Representation of some Aspects on the Irrigation System
    
  • 4.1 Database for the Irrigation System
    
  • 4.1.1 Physical model
    
  • 4.2 Thematic layers for the GIS
    
  • 4.3 Water requirements in each plot 4.3.1 System requirements
    
  • 4.4 Simulation of the Functioning of the Network
    
  • 4.5 Spatial Representation of some Queries on the Irrigation System
    
  • 4.5.1 Spatial representation of crop coefficients
    
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  • 4.5.2 Spatial representation of some plot valves
    
  • 4.5.3 Theissen polygon for rainfall heights on the plantation
    
  • 5.2 Recommendations
    
  • 5.2.1 Improvement of the system
    
  • 5.2.2 Further research