Summary of management options for temporary Sample Clauses

Summary of management options for temporary rivers 1. Reservoir release management 2. Land use change to alter evaporation 3. Abstraction (groundwater and surface water) control Management options for water quality take 5 basic forms 1. Reduce contaminant sources 2. Separate clean and dirty water in the basin 3. Mix dirty water with cleaner water to reduce concentrations 4. Increase the cleaner component of runoff (related to flow management) 5. Use accelerated natural attenuation to reduce contamination These options assume the basin is sufficiently unmodified for a natural reference condition to be defined as a goal. There are also numerous basins in the Mediterranean which are far removed from natural. There is no realistically obvious natural reference state for these basins, and a highly modified reference state must be defined before an assessment of management options can be made, but these are likely to be of the above form. This issue of flooding generally is also relevant to temporary basins, but is no different conceptually to the flooding problem in permanent rivers, so is not reviewed here. Table 3 summarises management issues specific to temporary waters, with a range of solutions. Pattern of flow discontinuity Reservoir release management Land use change to alter evaporation Abstraction control Accumulation of pollutants in the river bed; Flushing of pollutants when flow resumes (“first flush”); Domination of flow by contaminated sources, either point or diffuse (may also affect permanent rivers) Clean up contaminant sources; Separate clean and dirty water in the basin; Mix dirty water with cleaner water to reduce concentrations; Increase the cleaner component of runoff; Use accelerated natural attenuation to reduce contamination;