Optimum use of water resources (1977) describes a systems approach to solve complicated economic, agronomic and hydrologic problems encountered in the Varain Plain, Iran, in 1966. A solution was sought in the conjunctive use of surface water resources and those of the groundwater basin. A computerized groundwater model of the basin was developed for use as a simulation tool.
Between 1952 and 1993 the government of the Netherlands funded the Commission for Hydrological Research TNO (Commissie voor Hydrologisch Onderzoek TNO, CHO-TNO). During this period two publications series have been published: one in Dutch (Verslagen en Mededelingen), the other in English (Proceedings and Information: Rapporten en Nota’s).
The term extensive aquifers is used to denote aquifers whose horizontal dimensions are much larger than their thicknesses, so that the losses of head due to the vertical velocity components may be neglected. The term groundwater hydraulics is used in the sense of deductive theory.
This book by Boonstra and De Ridder (1981) was one of the first to describe the use of computer technology for numerical modelling of groundwater. It is still a very useful introduction for those engaging in modelling of groundwater systems.
The method consists of pumping the water out of an auger-hole extending below the water table and then measuring the rate of the rise of the water in the hole. It is a widely used procedure to measure the saturated hydraulic conductivity in saturated soils. The measured result is dominated by the average value of the horizontal conductivity of the profile.