Insufficient storage capacity with existing dams has led to conjunctive use of surface and groundwater in most areas.
The contribution of false-colour composites and visual interpretations is demonstrated in studies from India given in Table 2. Predicting soil-drainage class using remotely sensed and digital elevation data.
Geomorphological patterns are helpful in distinguishing salinization. Photogrammetric Engineering and Remote Sensing, 63(2): 171-178.
ATTEMPTS TO IDENTIFY WATERLOGGING AND SALINITY WORLDWIDE IWMI has already reviewed different RS applications for water-resources management (Bastiaanssen, 1998).
Part of the section related to salinity is summarized here. The selection of the best possible Landsat TM band combination for delineating salt-affected soils.
In arid and semi-arid regions, irrigation has brought about environmental problems of waterlogging and salinity.
According to the United Nations Economic and Social Commission for Asia and the Pacific (UN-ESCAP), affected areas exceed 1 million ha in Cambodia and Thailand, 3 million ha in Afghanistan, Bangladesh, Mongolia and Malaysia, 10 million ha in Pakistan and Indonesia, 20 million ha in China, India and Iran and over 350 million ha in Australia.
Salman Asif and Mubeen-ul-Din Ahmad GIS specialists, International Water-Management Institute Lahore, Pakistan INTRODUCTION At present rates of population growth, global food needs will increase while soil and water resources for new crop production will be limited and their quality will diminish.
Protection of soil resources and conservation of water are high on the agenda, because irrigated agriculture is one of the biggest producers of food. Zoutkartering met behulp van SPOT-beelden in Punjab, Pakistan.
Geologically, this part of the sub-continent, including the Indus plain, was formed from alluvium deposited by rivers into a shallow sea.
The receding sea left residues of salts in soil profiles and aquifers.
Fossil salinity occurs at margins of natural depressions, where rain and floodwater accumulate.