Productivity and Efficiency

According to the U.S. Environmental Protection Agency, water efficiency is the smart use of our water resources through water-saving technologies and simple steps. Using water efficiently will help ensure reliable water supplies today and for future generations. Topics addressed in this theme provide insights, lessons, and guidance on how diverse stakeholders are working to improve water management and reduce water use.

Productivity and Efficiency Resources

Bibliography of Interest in Utilization of Vascular Aquatic Plants

Published: 
January 1, 1972
U.S. Agency for International Development
Relatively few studies have been conducted on the utilization of aquatic weeds. Little (1968) listed 50 papers on the subject, and only a few reports have been published since his compilation. During recent months interest in the utilization of aquatic plants has increased, particularly with...Read more

Economic Damage Caused By Aquatic Weeds, Preliminary Survey

Published: 
December 1, 1971
U.S. Agency for International Development
This report attempts to estimate in a very preliminary way the economic significance of the aquatic weed problem in developing countries.Read more
Regional focus: 
United StatesNorth America

Planning Sediment Distribution in Surface Irrigation Systems

Published: 
November 1, 1971
U.S. Agency for International DevelopmentColorado State University
This report deals with planning sediment load distribution in surface irrigation systems. The object is to route water and sediment through an irrigation canal network so that sediment discharge equilibrium is achieved by diverting the sediment inflow with the farm supplies. A computer simulated...Read more

Revised Fisheries Prop (Project 512-15-180-247.4)

Published: 
October 19, 1971
U.S. Agency for International Development
USAID assistance in Northeast Brazil began in 1964 with a team of five PASA technicians which surveyed at the request of SUDENE. USAID has been providing technical assistance in Fish Technology and Fish Biology. PASA assistance is terminating but contractor assistance is to continue for two more...Read more
Regional focus: 
BrazilLatin America and the Caribbean

Sub-Irrigation in the Zapotitan Project

Published: 
October 1, 1971
U.S. Agency for International Development
Studies were made to determine the feasibility of Sub-Irrigation in the lower portions of the Zapotitan Valley. The report suggests sub-irrigation as a possibility for some of the areas within the valley.Read more
Regional focus: 
El SalvadorLatin America and the Caribbean

Nutritive Quality of Food in Ecological Systems

Published: 
October 1, 1971
U.S. Agency for International Development
The expression of net primary production in terms of dry matter, organic matter, carbon, or energy converts all units of plant production to an equivalent basis. However, net production differs in chemical composition and nutritive value depending upon species, plant age, and habitat. The nutritive...Read more

Annual Report for FY 1971

Published: 
August 1, 1971
U.S. Agency for International Development
This annual report details the work that was done at the International Center for Aquaculture from July 1970 through June 1971. It identifies the accomplishments over the year in topics including inland fisheries, fish breeding, fish feeding, methods for increasing fish production and training...Read more
Regional focus: 
United StatesNorth America

Maximum Water Delivery in Irrigation

Published: 
August 1, 1971
U.S. Agency for International DevelopmentColorado State University
In order to increase the water delivery efficiency of an existing irrigation system, it is proposed that modern mathematical optimization techniques be applied to the management of irrigation water delivery. A deterministic mathematical model is developed to simulate the events that occur in...Read more

Food Habits of the White Amur Stocked in Ponds Alone and in Combination With Other Species

Published: 
July 3, 1971
U.S. Agency for International Development
White amur, when stocked alone at rates of 40 (or more) per acre, effectively eliminated Chara spp., Potamogeton diversifolius, and Eurasian milfoil in less than 99 days, and caused a decrease in the amount of water hyacinths in 0.1-acre earthen ponds. Under these conditions, their diet consisted...Read more

Fisheries: A Selected List of References for Aid Technicians

Published: 
June 1, 1971
U.S. Agency for International Development
While AID reports and documents are the primary focus of this bibliographic series, other materials covering the work of international agencies, and various foundations and organizations in !.he field of technical assistance are included to a limited extent. AID employees should be able to benefit...Read more

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