Potential for Solar Photovoltaic Based Irrigation BETA
*GW - Ground Water
*SW - Surface Water
*GW+SW - Ground Water and Surface Water
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The Solar suitability mapping framework was developed using a GIS-based Multi-Criteria Evaluation (MCE) technique. The multi-criteria evaluation was implemented by combining spatial information from a number of geospatial drivers for solar based irrigation. These data sourced from a number of national and international databases include solar irradiation, groundwater levels, aquifer productivity, groundwater storage, proximity to rivers, proximity to small dams, crop and land suitability, roads and travel time to markets. First, a constraint layer was developed to differentiate areas that would be suitable for solar based irrigation from those that cannot be suitable under any condition. Field slope areas were constrained to 8% to limit runoff and accelerated erosion from steep slope areas. Protected zones, forested, areas with low groundwater storage or inadequate irradiation were also identified to be unsuitable for solar irrigation and were excluded. Market constraint was determined by limiting solar based irrigation areas to within 5 km of a nearest road. An agro-ecological zone layer was developed by identifying areas that are unsuitable for agricultural production and limiting the analysis to areas with greater than 900 mm of annual rainfall and elevation below 500 m.
Each of the input drivers (solar irradiation, groundwater levels, aquifer productivity, groundwater storage, proximity to rivers and reservoirs, landuse and travel time to markets) were rescaled to a 1-5 scale and used to derive weighted combination maps for the suitable areas. Layer weights were determined using the Saaty analytic hierarchy process in a GIS environment. A nearest neighbour resampling scheme was used to resample each of the individual inputs to obtain final suitability areas at a 30 meter resolution.
Suitability for solar-powered irrigation was mapped under five water resources conditions: using groundwater at very shallow (0-7 m) and shallow (0-25 m) levels, based on the proximity to rivers and reservoirs, using both surface water and groundwater resources at a 0-7 m groundwater depth, and surface water and groundwater resources groundwater up to a depth of 25 m.
Instructions: This section will present you results of above selection. Multi-section is possible and it will be display in below table after clicking the button 'Calculate suitability'.
Once you have select one or more (water source + lifting capacity for underground water + location) you can use below buttons to plot your results
This will allow you to download you the result in a .cvs format
It is also possible to delete already analysed data bit use 'x'
For more information on the methodology used to calculate the suitability: here
Instructions: select the water source you are planning to abstract using solar based pumping. Multiple selections possible
Groundwater represents all water which occurs below the land surface. It includes both water within the unsaturated and saturated zones. (for more information see here )
Surfacewater represents all water above the earth's surface. This includes lakes, reservoirs, wetlands, rivers, small ponds or any other form of water stored in the landscape.
Instructions: Based on the pump specifications of the surface pump or a submersible pump, select the maximum head (m) where the flow rate first reaches zero (Global LEAP 2019 buyers guide). (photo credit Global LEAP 2019 buyers guide)
0m - 7m: The interval assumes that below 7m the pump would be unable to lift water.
0m - 25m: The interval assumes that below 25m the pump would be unable to lift water.
0m - 50m: The interval assumes that below 50m the pump would be unable to lift water.
0m - 100m: The interval assumes that below 100m the pump would be unable to lift water.
0m - 250m: The interval assumes that below 250m the pump would be unable to lift water.
0m - 250m+: The interval assumes that above 250m the pump would be able to lift water.
Welcome to our interactive online tool to assess land suitability for photovoltaic based irrigation using solar energy. The tool supports you in identifying suitable areas for solar based irrigation depending on water sources and pump characteristics. To use the tool, click on the left panel and select your water source, pump capacity and country of interest. For a detailed description on the methodology and spatial information used please go to the methodology tab. As data remains scarce for some countries in Africa we appreciate if you would like to support us by sharing relevant spatial information so we can refine our maps. Please use the lower left box to share any relevant information.
As we continuously strive to update and refine the tool for you we would appreciate any feedback. Please use our feedback link to let us know about your thoughts. We would appreciate any suggestions to improve our product and to know any defects and bugs.
A virtual guide about use use of the tool is included here
We hope you enjoy your platform