Integrated Catchment Management Planning
A surface water catchment is simply defined as an area of land that contributes water to a river, lake or other water body. As all activities within a catchment have the potential to impact upon the water bodies within, an integrated catchment management (ICM) approach is increasingly seen as the methodology best suited to either improve unsatisfactory water conditions or ensure the protection of good / high water quality resources.
Hydrec Environmental Consulting have experience in the preparation of detailed Integrated Catchment Management Plans (ICMPs). The typical methodology undertaken includes:
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Initial Catchment Characterisation. As a starting point, the catchment of interest must be delineated. We have extensive experience in the delineation of catchments using GIS software and Digital Elevation Model (DEM) data. This process is typically followed by a desktop review of the existing water quality analysis, mapping and information on known pressures / sources of pollution. At this juncture a preliminary Catchment Conceptual Model (CCM) is prepared.
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Further Catchment Characterisation. As part of the provisional assessment, all data gaps limiting the development of the final CCM are identified. Additional water quality monitoring, soil analysis, catchment walks, contaminant load estimations and hydrological / hydrogeological analysis are tasks commonly carried out to inform the development of the revised CCM and final Integrated Catchment Management Plan.
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Identification & Evaluation of Source Protection Measures. Following the identification of potential pollutant pathways and critical source areas (CSAs) within the catchment, source protection measures can be designed and implemented. Careful consideration must be given to any measure proposed in flood zones or in areas of special ecological or heritage importance.
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Implementation Programme. In order to ascertain the effectiveness of any mitigation / source protection measure implemented, water quality monitoring / ecological assessment is commonly undertaken. The results of such analysis can be used to further strengthen the CCM or advise on the adjustment of the source protection measures / strategies where needed.
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Integrated Catchment Management Planning plays a key role in drinking water source protection. In addition, the preparation of ICMPs can also prove vital when trying to protect or restore ecological habitats. Likewise, recommendations outlined in an ICMP and then subsequently implemented could serve to enhance the aesthetic and recreational value of a waterbody. If you are involved in the management of a drinking water source or belong to a community group / organisation seeking funding for the protection / restoration of a waterbody, an ICMP could prove invaluable to your cause.