Showing papers by "Tim D. Fletcher published in 2001"

Developing predictive ecological capacity for a stormwater management decision-making framework

Abstract: SUMMARY: A decision-making framework (DMF) for stormwater management based on a stochastic watershed model has been developed by the CRC for Catchment Hydrology. The DMF predicts stormwater flows and loads of pollutants (total suspended solids, phosphorus, nitrogen and gross pollutants) exported from urbanized catchments with varying types and levels of stormwater abatement techniques. The utility of the DMF is limited by the lack of prediction as to the effects of these changes on the ecology of receiving waters. This paper places the DMF within a conceptual model of stormwater physico-chemical impacts on stream ecosystems. Emerging methods are identified and described for in- serting predictive models of ecological indicators (community composition) into the DMF, and to include the assimila- tive capacity of the stream ecosystem as part of the 'treatment train'. Current research using the catchment ecosystem approach to quantify in-stream biogeochemical processes is described, and areas of research need are identified, such as the effects of the spatial arrangement of catchment urbanization on stream ecology and the interactions between engi- neering solutions, stream condition and human behaviour.