FAO Irrigation and Drainage Paper

2 primary works

Materials for Subsurface Land Drainage Sustems

by L. C. P. M. Stuyt, W. Dierickx, and J. Martinez Beltran

Published 25 August 2000

Reliable subsurface drainage systems for groundwater table and salinity control are needed to maintain or enhance the productivity of irrigated lands and to contribute to the rural development of lowlands in the humid tropic. This publication presents guidelines to assess the need for envelopes and for the selection of appropriate materials (i.e. pipes and envelopes) for the proper and lasting performance of subsurface drainage systems. In addition, it also contains guidelines for adequate installation and maintenance of drainage materials as well as the required specifications and standards of such materials, which may be used in tender documents for implementation of subsurface drainage works. The purpose of this technical paper is to provide this practical information to drainage engineers and contractors who are in charge of drainage projects.

Guidelines and Computer Programs for the Planning and Design of Land Drainage Systems

by W.H. Van Der Molen, J. Martinez Beltran, and Walter J. Ochs

Published 27 June 2007

This publication considers the integration of technical, socio-economic and environmental factors and the need for system users' participation in the planning, design, operation and maintenance processes. It provides guidelines for the identification of drainage problems, for the planning and design of field drainage systems (surface and subsurface) and the main drainage and disposal systems. The annexes provide more detailed information with technical background, appropriate equations, some cross-references for finding appropriate methodologies, and computer programmess for calculation of extreme values, of permeability and some land drainage system parameters.