Flooding in San Diego County Deserts The Desert…For Many, a Desirable Place to Live


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Flooding in San Diego County Deserts


The Desert…For Many, a Desirable Place to Live



However desirable it may be to live in the desert, there are certain considerations one needs to know about when deciding to build in the desert.



Desert Geology/Climate



The Creation of Alluvial Fans



The Creation of Alluvial Fans



Mapped Alluvial Fans

  • Flood Control has extensively studied the hydrological flows of alluvial fans in the region

  • Has determined with reasonable accuracy: area of affect of 100-yr flows, depth of 100-yr flows



As development occurs on the desert floor, it becomes vulnerable to the processes of alluvial fan creation



This can lead to property damage





What Can Be Done to Minimize Flood Damage?

  • The home can be elevated above the 100-year flood level

  • Orient structure to present minimum obstruction to flow

  • The rest of property should remain free of obstructions to allow free flow of water around home



Future Concerns

  • Increased development can interfere with the efficient transport of water and debris by constricting flows to increasingly smaller spaces between homes



Possible Solutions



Example - Rams Hill



Open Space Drainage

  • Open belts of undeveloped land established along major flood flows

  • Flood flows from properties and roads gradually diverted into open belts



If homes and developments can be designed to accommodate the forces of nature rather than resist them, potential damage to both homes and the desert can be minimized




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