WP-4: Establishing of databases and submodel testing and adaptation in the Oueme basin

Objectives

• Establishing a water resources database in the Oueme basin
• Testing, adapting and quantification of uncertainties of the coupled surface water (HBV)/water quality (MONERIS/QUALIE) models developed in the Neckar basin
• Establishing a data base on water demand as well as testing, validating and quantification of uncertainties of the water demand model WEAP in relation to economic aspects
• Establishing of a land resources information system as well as quantification of uncertainties of the submodel for crop production in relation to less detailed soil information as compared to the Neckar basin
• Developing an agro-economic valuation model for water resources and estimation of an economic supply module
• Establishing an overall project database for the Oueme basin

Description of work

The idea is to transfer the integrated model with its submodels developed in the Neckar basin to a region with different climatic conditions as well as lower data availability. To that end, databases about water resources, water demand and land resources will be established in the same structure as done in the Neckar basin. A GIS environment will be used to store, organize, analyze and visualize the data. Then the available submodels HBV (surface water), MONERIS/QUALIE (water quality), EPIC (agricultural production model) and WEAP (water demand) will be tested under the changed conditions and if necessary adjusted. Due to the geological settings, groundwater flow models would be restricted to the alluvial aquifers of the river valleys and other small formations. The possibility of groundwater use and appplication of groundwater resources modelling will be evaluated. The errors with and without adjustment will be analyzed.

Based on primary and secondary data, the economics of households and agricultural production systems in relation to climate and land use will be studied to craete a database for the development of the economic valuation model. Here training in econometrics, data exploration, production function analysis and estimation of supply functions will be provided and a model to describe the behavior of economic agents in response to water supply will be tested. The idea is to use descriptive functional forms that can be included directly within the mesoscale hydrological model HBV. In adddition, valuation components will be appended to the HBV model, so as to price water at it’s various locations. Again the submodels will be used for the quantification of landuse change impact on the surface water dynamics, originating from the economic scenarios as well as the response to different climate scenarios. As in the Neckar basin, an overall project database for the use of all project partners will be established.

Deliverables

• Database on hydrological resources and water availability for the Oueme basin
• Completed soil information system for the Oueme basin
• Database on agroeconomic conditions in relation to water availability in the Oueme basin
• Submodel for agricultural productivity and potential pollutant loads in the Oueme basin
• Validated submodel for surface water quality for the Oueme basin
• Adapted model for surface water resources, groundwater and water quality in the Oueme basin incl. uncertainty analysis
• Adapted model for water demand in the Oueme basin
• Adapted agroeconomic valuation model for the Oueme basin

Milestones and expected results

• Specifications for database structure and data formats
• Database for water resources established
• Database on water demand established
• Database on land resources established
• Submodel for surface water quality handed over to WP-5
• Built up data base for Oueme basin
• Submodel for surface water resources incl. water quality handed over to WP-5
• Submodel for groundwater resources incl. water quality handed over to WP-5
• Submodel on crop productivity and environmental impact handed over to WP-5
• Submodel for water demand handed over to WP-5
• Results of agroeconomic valuation model handed over to WP-5

Designed by
SIC ICWC