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Impact of Discharge to Land Surface on Groundwater Response Times from Sloping Aquifers

出版	CSIRO Land and Water, 2006
URL	http://books.google.com.hk/books?id=EV6rAQAACAAJ&hl=&source=gbs_api

註釋Groundwater aquifers impose time-lags between changing recharge and a subsequent change in groundwater discharge to the land surface and to streams. This groundwater response time varies depending on several factors, including length, transmissivity, and steepness of the aquifer. For particular aquifers, it is certainly possible to use complex process-based models to predict their response times. However, this report provides a simpler method for estimating groundwater response time, with the aim of being able to quickly estimate groundwater response times across large catchments in a quick and efficient manner. This "idealised analogue" for a sloping aquifer system was published by Walker et al. (2005), although it dealt only with groundwater discharge from the lower end of the aquifer (i.e. directly to the river). This report extends Walker et al. (2005), by expanding the mathematics to deal with the more complex situation of predicting the groundwater response time where there may be groundwater discharge directly to the land surface. The objective of this report is to model the groundwater response to a change in recharge through the further development and testing of the idealised sloping groundwater analogue of Walker et al. (2005) for the more complex cases of groundwater discharge directly to the land surface along the aquifer flow path. Specifically, to develop groundwater response times, and relate these to catchment characteristics.