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Friday, February 7, 2020 | History

2 edition of More water for arid lands found in the catalog.

More water for arid lands

National Academy of Sciences, Washington, D.C. Advisory Committee on Technological Innovation.

More water for arid lands

promising technologies and research opportunities : report of an ad hoc panel of the Advisory Committee on Technology Innovation, Board on Science and Technology for International Development, Commission on International Relations.

by National Academy of Sciences, Washington, D.C. Advisory Committee on Technological Innovation.

  • 52 Want to read
  • 37 Currently reading

Published by National Academy of Sciences in Washington .
Written in English

    Subjects:
  • Water-supply.,
  • Water conservation.,
  • Water-supply, Agricultural.,
  • Arid regions.

  • Edition Notes

    ContributionsUnited States. Agency for International Development. Office of Science and Technology.
    Classifications
    LC ClassificationsTD353 .N37 1974
    The Physical Object
    Paginationvii, 153 p. ;
    Number of Pages153
    ID Numbers
    Open LibraryOL5049157M
    LC Control Number74010058

    The network works through 15 focal groups spread out across the African Great Lakes region, in Kenya, Tanzania and Uganda. In addition to excellent food in the form of eggs, milk and meat, animals serve as beasts of burden, and can be trained to handle difficult jobs on the farm. I like this. If practical means to reduce this process can be found, major savings can be realized in the amount of water needed to raise a given crop chapter Cattle may be used for milk, for meat, for farm labor, and for their hides and other by-products.

    Reducing Cropland Percolation Losses Large areas of sandy soil in arid lands are not used for agriculture because the water sinks below the root zone too rapidly and the extra irrigation water needed to compensate for this problem is not available. Reducing Seepage Losses Seepage causes serious water losses in canals and impoundments. She further explains how our thinking about deserts is problematically related to our conceptions of forests and desiccation. These environmental conditions include high intensity of sunlight, high wind speed, rapid loss of water through evaporation or evapotranspiration, low amount of precipitation, low soil moisture content, low soil water-holding capacity, high rate of water permeability, high level of soil salinity, and deficiency in soil nutrients [ 3334 ]. In addition, appropriate care of animals is necessary, and even poor herdsmen are often very skilled in raising animals.

    This bulletin suggests that one must begin to improve local agriculture in arid zones by learning what is already there. Approximately one-quarter of the land on Earth is threatened by desertification. Some are more complex and expensive, and may require engineering, such as building bench terraces, correcting gullies, and building ponds and dams. I had planned to read a few pages before sleep last night


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More water for arid lands by National Academy of Sciences, Washington, D.C. Advisory Committee on Technological Innovation. Download PDF Ebook

Conclusion It is crucially needed to use each drop of expensive freshwater resource in drought regions cautiously and wisely.

More water for arid lands book of the potential solutions include: dry season irrigation of pastures; restricted grazing of pastures during wet seasons so that feed will remain More water for arid lands book the dry season; harvest and storage of wet feed as silage; harvest and storage of dry feed as hay, or as seed, in the case of grain crops; cultivation of feed crops adapted to arid zones; and migration to more productive areas.

Grading land to a flat surface usually requires high capital costs for equipment, fuel, and maintenance. Government Printing Office, Washington, D. My complaint - I want the next instalment! Basically there are two approaches: increasing the supply of usable water and reducing the demand for water.

I was able to survive vicariously through the sophisticated and adventurous tale that followed. Smith-Enke Rd. Table 2. Despite the lack of water, a number of animals call deserts home.

As Davis explains, these environments are not governed by the equilibrium ecological dynamics that apply in most other regions. Then both techniques and plants that may be useful in specific situations are suggested. The Challenge of the Negev by Dr. Desert rain often never makes it to the ocean, the streams usually end in lakes that dry up or the streams themselves just dry up.

The system must deliver the right amount of water to the user at the right time. However, in almost all of these crops, seeds must be germinated or cuttings must be rooted under conditions of almost normal water availability.

This can lead to problems of waterlogging and salinity, and leaching of fertility. At the level of the home: Reduce water use in the home.

Sustainable value Grasses are the most plentiful species in the plant kingdom with enormous socio-economic potentials. One of the most useful possibilities for increasing dry season feed is the use of crop residues. There are techniques suitable for all arid regions. Gibbons; 2. Windbreaks can also be constructed of non-living materials, which are likely to be expensive.

Cultivating the indigenous grasses of drought lands should be synchronized with the best agricultural practices and the most recent innovations of soil-plant water use efficiency.

Desert Definition and Characteristics

It is the world's driest place, receiving less than two inches of precipitation annually. Nevertheless, it is possible to make some More water for arid lands book about such soils.

These are costly systems, but high agricultural productivity can be achieved with small amounts of water in very inhospitable regions chapter Other Sources of Water This chapter briefly mentions groundwater mining, desalting, solar distillation, the use of satellites and aircraft for detecting water in arid lands, rainfall augmentation, the possibility of using icebergs as a source of water, and dew and fog harvesting chapter 6.

A Practical Handbook of Water Supply. This bulletin suggests that one must begin to improve local agriculture in arid zones by learning what is already there.

There are plants with a short life cycle that can germinate, grow, and produce during a very short period of available moisture.arid lands water evaluation and management Download arid lands water evaluation and management or read online books in PDF, EPUB, Tuebl, and Mobi Format.

Click Download or Read Online button to get arid lands water evaluation and management book now. This site is like a library, Use search box in the widget to get ebook that you want. Davis concludes that a new understanding of the arid lands as healthy, natural, but variable ecosystems that do not necessarily need improvement or development will facilitate a more sustainable future for the world's magnificent drylands.

The Arid Lands

Table of Contents. Buy This Book in Print. Start studying TOPOGRAPHY OF ARID LANDS. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

This is a watercourse that carries water only during the 'wet season' or during and immediately after rains These are more than 99% of all desert streams. playa. This is a dry lake bed in the basin of interior.Water that is conserved More water for arid lands book just as valuable as water that is obtained, and conservation is pdf of the best strategies for arid zones.

There are many techniques, here presented only as lists. At the level of the home: Reduce water use in the home. Capture gray water .Water that is conserved is just as valuable as water that is obtained, and conservation is one of the best strategies for arid zones. There are many techniques, here presented only as lists.

At the level of the home: Reduce water use in the home. Capture gray water .Arid Lands Water Evaluation and Management (Environmental Science and Ebook [Robert Ebook, Thomas Missimer] on tjarrodbonta.com *FREE* shipping on qualifying offers.

A large part of the global population lives in arid lands which have low rainfall and often lack the water required for sustainable population and economic growth. This book presents a comprehensive description of the Author: Robert Maliva.