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Adaptation of water resources management to climate change

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ADAPTATION OPTIONS FOR SOUTHERN AFRICAA number <strong>of</strong> institutions are working in Southern Africa <strong>to</strong> lessen the impacts <strong>of</strong> <strong>climate</strong> <strong>change</strong> bystrengthening disaster preparedness efforts. Participants at the Regional Dialogue on Climate Change,Water and Wetlands in Southern Africa, identified a number <strong>of</strong> technical, financial and socio-economicoptions <strong>to</strong> improve the adaptive capacity <strong>of</strong> the region <strong>to</strong> <strong>climate</strong> <strong>change</strong>. Some <strong>of</strong> the optionsidentified include improved forecasting, retr<strong>of</strong>itting infrastructure with additional safety features,increasing <strong>water</strong> s<strong>to</strong>rage capacity, instituting <strong>water</strong> demand <strong>management</strong>, implementing <strong>water</strong>reclamation, and supporting flood and drought insurance.Tackling the challenge <strong>of</strong> <strong>climate</strong> <strong>change</strong> provides a new opportunity for collaboration andpartnership, since none <strong>of</strong> the countries has the <strong>resources</strong> or capacities <strong>to</strong> adapt successfully on itsown. Participants at the Regional Dialogue recommended that a "network <strong>of</strong> champions" be createdin Southern Africa <strong>to</strong> support and drive a new regional initiative on adaptation. Institutions thatshould be included in the network include river basin commissions and committees, the SouthernAfrican Development Community, national committees on <strong>climate</strong> <strong>change</strong>, wetlands and <strong>water</strong>, theGlobal Water Partnership, IUCN The World Conservation Union, and Global Legisla<strong>to</strong>rs for a BalancedEnvironment (GLOBE). The main tasks <strong>of</strong> this network would be <strong>to</strong> raise public and political awarenessfor incorporating <strong>climate</strong> <strong>change</strong> in<strong>to</strong> <strong>water</strong> and wetland resource planning and <strong>management</strong>.EXPERIMENTING WITH ALTERNATIVE APPROACHES TO WATER RESOURCESALLOCATION INCREASES YIELDS IN ANDRA PRADESH.In Andra Pradesh, India, experiments growing paddy rice with a minimum amount <strong>of</strong> <strong>water</strong> duringdry years has resulted in an overall reduction <strong>of</strong> <strong>water</strong> demand by farmers. Traditionally, no cropsare grown in the irrigation tank command areas before the tanks are half-full <strong>of</strong> <strong>water</strong>, which usuallyhappens <strong>to</strong>wards the end <strong>of</strong> August. This is in spite <strong>of</strong> the fact that enough soil moisture would beavailable in the command areas earlier. Experimentation with early deep seeding and weeding inJune demonstrated that under specific conditions a crop can be grown with considerably less <strong>water</strong>.The experience has important implications for <strong>management</strong> <strong>of</strong> the command area during dry yearswhen not enough <strong>water</strong> would be available in the tanks and reservoirs. Using the new techniqueallows the entire command area <strong>to</strong> receive supplemented irrigation during the critical floweringand yield formation periods. Experiments carried out during a drought showed that though theyields per hectare would decrease by about 10 percent, the <strong>to</strong>tal yield in the command area wouldincrease by as much as 50%. These types <strong>of</strong> experiments will need further support if societies are <strong>to</strong>adapt <strong>to</strong> <strong>change</strong>s in the hydrological cycle due <strong>to</strong> <strong>climate</strong> <strong>change</strong>. 4044

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