ABSTRACT
This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book addresses the subject of temporary drainage, though many of the principles are common to both temporary and permanent requirements. It discusses groundwater flow and permeability as it applies to soil and rock. The book also discusses groundwater models in all their forms – conceptual, analytical and numerical – especially in relation to flow to wells. It describes various empirical and simple design methods for assessing the discharge flow rates required for groundwater lowering installations and for determining the number of wells, etc. The book deals with some environmental impacts of groundwater lowering, including ground settlements. It presents appropriate methods of monitoring and maintenance, respectively, to ensure that groundwater lowering systems operate effectively when they are first installed and after extended periods of operation.
