IDENTIFICATION OF INTERNAL FLOW DYNAMICS IN 2 EXPERIMENTAL CATCHMENTS

Identification of the internal flow dynamics in catchments is difficul t because of the lack of information in precipitation-stream discharge time series alone. Two experimental catchments, Hydrohill and Nandadi sh, near Nanjing in China, have been set up to monitor internal flows reaching the catchment stream at various depths, from the surface runo ff to the bedrock. With analysis of the precipitation against these in ternal discharges, it is possible to quantify the time constants and v olumes associated with various flowpaths in both catchments.