

@mastersthesis {6924,
	title = {Large-scale hydrological modelling: physical parameterisation for groundwater recharge ({BL})},
	year = {1997},
	note = {U088560},
	school = {University of Newcastle Upon Tyne (United Kingdom)},
	type = {phdPh.{D}.},
	address = {Ann Arbor},
	abstract = {There is currently worldwide interest in the effect of human activity on the global environment, especially the effect of greenhouse gases and land-use change on the global climate, and models are being developed to study both global change and the local effects of global change. The research reported here (funded by CNPq-Brazil) involves the development of GRASP: Groundwater Recharge Modelling Approach with a Scaling-up Procedure. GRASP has been integrated into the UP (Upscaled Physically-based) macromodel, developed under the UK NERC TIGER programme, which is designed for studying the effects of climate and land-use change on the availability and quality of water resources. The UP macromodel will be coupled to the UK Meteorological Office{\textquoteright}s Unified (weather and climate) model to create a state-of-the-art coupled atmospheric/hydrological model.Several important requirements for the design of new large-scale hydrological models are identified in a wide ranging review on GCMs (General Circulation Models) and physically-based hydrological modelling, and these requirements have been applied in the development of GRASP (and UP). The main requirements are a physical basis, proper treatment of spatial variability, and simplicity.Using the concept of partial analysis, two point-scale models, SM (Soil Moisture content approach) and TF (Transfer Function approach), are developed for recharge, both based on the one-dimensional Richard{\textquoteright}s equation. SM is a simple two-parameter model relating recharge to water storage in the unsaturated zone, and several unsuccessful attempts are made to link its parameters to physical properties. TF is a transfer function model, and is parameterised using the matric potential and unsaturated hydraulic conductivity functions using a new approach developed especially for GRASP. Both SM and TF are verified against numerical solutions of Richard{\textquoteright}s equation.},
	keywords = {(UMI)AAIU088560, 0547:Ocean engineering, Applied sciences, Bibliographies, Ocean engineering, Psychology{\textendash}Abstracting, Statistics},
	url = {http://search.proquest.com/docview/301623680?accountid=14270},
	author = {da Silva, L.P.}
}
