Library has French version: Exploitation des ressources communautaires en Chine

The main goal of biomanipulation by fish reduction is not a change in the fish community but a change in the aquatic ecosystem. Fish reduction is a method to push the system in another state, usually a shift from algae domination to macrophyte domination. Intensive fish removal is done by one of the following methods: seining (the Netherlands, Germany, UK), trawling (Sweden, Finland), use of rotenone (Norway, USA, Poland) and stocking of piscivorous fish (USA, Germany). If circumstances allow it (reservoir, ponds) draining is combined with seining (the Netherlands, UK, Poland).

Las presentes directrices han sido elaboradas para asistir a los políticos, planificadores, técnicos y otros agentes implicados, en la decisión de adoptar una política de TGR, y en el caso de que se adopte, en la formulación de un programa efectivo. Un programa de estas características es el que tiene como resultado un proceso de transferencia de las funciones de la agencia de riego a las Asociaciones de Usuarios apropiado, satisfactorio y sostenible, que fomente un desarrollo equitativo en las áreas rurales.

This document contains the proceedings of the Subregional Workshop on Land Water Information Systems (LWRIS) in the Caribbean, held in Barbados in October 2000. The meeting was organized by FAO Land and Water Development Division (AGL), in collaboration with the Caribbean Agricultural and Research Development Institute.

Based on the FAO-ESCAP project to develop 'national water visions' in the Asia-Pacific region that would set out each country's goals for sound water management to meet the needs of all for this vital natural resource over the next two decades. Contains four Southeast Asia case studies (Malaysia, Philippines, Thailand and Viet Nam), which were carried out as part of the project and looks at water use in these countries and how they plan to fulfil their water visions.

This publication is a set of practical guidelines and norms for field project engineers for the design and building of small hydraulic structures using earth and gabions. This publication would be useful in designing small earth dams with a gabion spillway, intake weirs for gravity irrigation schemes, groynes, river bed training works and for protection against hydraulic erosion.

For forecasting agricultural production to design cropping patterns and to utilize water effectively, a computerized agricultural production monitoring system named PDM was selected. The Nam Oon irrigation project was chosen as a case study. PDM was used for agricultural production forecasting in the Nam Oon project for ten cultivation seasons from the 1995 wet season to the 2000 dry season. The factors affecting flow in the canal and the agricultural production forecasting equation were also investigated.

This Order establishes the modalities for state monitoring of subsoil, which shall be an integral part of complex environmental monitoring. The main tasks of state monitoring of subsoil shall be: (a) collection of data and information on subsoil; (b) assessment of the state of subsoil and forecasting changes thereof; (c) registration of the stock of groundwater; (d) prevention of negative geological impacts; and (e) providing state bodies, organizations and subsoil managers with information regarding changes in the state of subsoil.

Prepared as part of a study on innovations for irrigation management, this report analyses the history of changes and processes around the de-collectivisation of agriculture in Vietnam in the 1980s.At this time, emerging farming households in the Red River Delta became directly involved in agriculture. New water service requirements arose from de-collectivisation. Former irrigation and drainage management companies (IDMC) lowered their involvement in irrigation activities to the benefit of cooperatives that developed local irrigation capacities.