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<br />I <br /> <br />I <br /> <br />I <br /> <br />GENERAL PLANNING STRATEGY <br /> <br /> <br />There are many demands on the land and water resources of an urban region. <br /> <br /> <br />The demands are associated with efforts to achieve a variety of objectives <br /> <br /> <br />such as economic development, regional development, transport, social well- <br /> <br />being and environmental quality. Because these resources are limited, and <br /> <br /> <br />the demands are not limited, these objectives compete with one another. <br /> <br /> <br />In terms of drainage, competing objectives must be considered and recon- <br /> <br /> <br />ciled through a formal planning strategy. A planning strategy contains <br /> <br /> <br />goals and objectives and provides a policy. <br /> <br />I <br /> <br />I <br />I <br />I <br /> <br />Within this context, demands for the land and water resources can be ordered <br /> <br /> <br />in terms of their ability to achieve desired goals and objectives. This is <br /> <br /> <br />a device that can be used in the decision-making process. Drainage must be <br /> <br /> <br />viewed as one of many issues affecting the use of land in the metropolitan <br /> <br /> <br />area. While floodplain areas can provide recreational opportunities, all <br /> <br /> <br />recreation areas should not be dependent on drainage considerations. <br /> <br />I <br /> <br />I <br />I <br /> <br />Drainage basins are convenient units for water resources management purposes. <br /> <br /> <br />Within the boundary of each drainage basin, a system of watercourses has <br /> <br />evolved which is specifically related to the physical and hydrologic condi- <br /> <br /> <br />tions. The watercourses, and the floodplains developed through periodic <br /> <br /> <br />inundations, are the primary areas of consideration in drainage basin <br /> <br /> <br />management. However, to mitigate flood losses, control erosion, manage <br /> <br />sedimentation, and abate water pollution, it is necessary to formulate <br /> <br /> <br />management policies not only for the watercourses and floodplains, but also <br /> <br /> <br />for all parts of the drainage basin. <br /> <br />I <br /> <br />I <br />I <br /> <br />I <br /> <br />I <br />I <br />I <br /> <br />I <br />I <br /> <br />V-3 <br />