Irrigation Systems

Irrigation Systems

Author: Adrian Laycock

Publisher: CABI

Published: 2011

Total Pages: 315

ISBN-13: 1845938747

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Of all the confrontations man has engineered with nature, irrigation systems have had the most widespread and far-reaching impact on the natural environment. Over a quarter of a billion hectares of the planet are irrigated and entire countries depend on irrigation for their survival and existence. Considering the importance of irrigation schemes, it is unfortunate that until recently the technology and principles of design applied to their construction has hardly changed in 4,000 years. Modern thinking on irrigation engineering has benefited from a cross-fertilization of ideas from many other fields including social sciences, control theory, political economics and agriculture. However, these influences have been largely ignored by irrigation engineers. Drawing on almost 40 years of experience of irrigation in the developing world, Laycock introduces new ideas on the design of irrigation systems and combines important issues from the disciplines of social conflict, management, and political thinking.


The Problem of Securing Closer Relationship Between Agricultural Development and Irrigation Construction (Classic Reprint)

The Problem of Securing Closer Relationship Between Agricultural Development and Irrigation Construction (Classic Reprint)

Author: David Weeks

Publisher: Forgotten Books

Published: 2017-11-19

Total Pages: 104

ISBN-13: 9780331457476

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Excerpt from The Problem of Securing Closer Relationship Between Agricultural Development and Irrigation Construction Irrigation Development in California - The state of California comprises acres. Of this, 29 per cent is agricultural land included in farms, 12 per cent is cultivated, 5 per cent is irrigated, and 8 per cent is under irrigation projects completed or partly constructed. Of the total area of the state 15 per cent may ultimately be irrigated. From 1909 to 1920 there was an increase of 58 per cent of the irrigated area of the state, but irrigation construction was provided for a larger area. Lag of Profitable Farming Behind Irrigation Construction - The total area projects were equipped to irrigate in 1924 amounted to acres. Of this, acres, or about 18 per cent, were irrigable but not irrigated, and acres, or about 82 per cent, were irrigated but not all of this was fully improved. Only acres, or 71 per cent, were making good use of the water. In the projects in the state acres of non-agricultural land, which is nominally assessed, were included. This land contributes little revenue to the projects, but is included because the larger total acreage results in a smaller average cost per acre for construction, which helps in promotion and financing. In addition, there are approximately acres of irrigable land in projects for which construction has not yet been provided. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.


Improving irrigation project planning and implementation processes in Sub-Saharan Africa: Diagnosis and recommendations

Improving irrigation project planning and implementation processes in Sub-Saharan Africa: Diagnosis and recommendations

Author:

Publisher: IWMI

Published: 2006-01-23

Total Pages: 93

ISBN-13: 9290906138

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Weaknesses in planning and implementation (P&I) have been identified as one of the main reasons for the disappointing results of agricultural water development and management projects. Based on a review and critical analysis of experiences and case studies in sub-Saharan Africa, this studycomponent proposes practical ways of improving performance related to planning and implementation and thereby enhancing the returns to investments in agricultural water.