MAPPING OF RIVER WATER QUALITY USING INVERSE DISTANCE WEIGHTED INTERPOLATION IN OGUN-OSUN RIVER BASIN, NIGERIA
Sustainable management of water resources involves inventory, conservation, efficient utilization, and quality management. Although, activities relating to quantity assessment and management in terms of river discharge and water resources planning are given attention at the basin level, water qual...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Debrecen University Press.
2013-09-01
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| Series: | Acta Geographica Debrecina. Landscape & Environment Series |
| Subjects: | |
| Online Access: | http://landscape.geo.klte.hu/pdf/agd/2013/2013v7is2_2.pdf |
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| Summary: | Sustainable management of water resources involves inventory, conservation, efficient utilization, and
quality management. Although, activities relating to quantity assessment and management in terms of
river discharge and water resources planning are given attention at the basin level, water quality assessment
are still being done at specific locations of major concern. The use of Geographical Information System
(GIS) based water quality information system and spatial analysis with Inverse Distance Weighted
interpolation enabled the mapping of water quality indicators in Ogun and Ona catchment of Ogun-Osun
River Basin, Nigeria. Using 27 established gauging stations as sampling locations, water quality indicators
were monitored over 12 months covering full hydrological season. Maps of seasonal variations in 10
water quality indicators as impacted by land-use types were produced. This ensured that trends of specific
water quality indicator and diffuse pollution characteristics across the basin were better presented
with the variations shown along the river courses than the traditional line graphs. The production of
water quality maps will improve monitoring, enforcement of standards and regulations towards better
pollution management and control. This strategy holds great potential for real time monitoring of water
quality in the basin with adequate instrumentation. |
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| ISSN: | 1789-4921 1789-7556 |