Analytical assessment and parameter estimation of a low-dimensional groundwater model.

摘要: Summary A class of transient groundwater models exists between the simple 0-dimensional storage–discharge functions and numerically-solved 2- 3-dimensional spatially-distributed models. This contains analytical solutions to linear partial differential equations subjected time-varying stress, such as recharge or pumping. These are limited homogeneous 1-dimensional (1-D) representations an aquifer. Their use in watershed is rare date, even though they computationally efficient overcome some major weaknesses single-valued functions. Because these 1-D have for hydraulic head discharge, allow both a simpler initial assessment model suitability estimation parameters using methods. We evaluate two analytical, graphical parameter methods whereby: (1) second time derivative state (in this case, volume) plotted against first same state, (2) one (volume) another (piezometric height). In cases identification data “envelope” used estimate parameters, groupings thereof. assess alluvial plain system New Zealand examine limitations envelope techniques estimating aquifer at catchment scale.