The lowland basis around Los Angeles contains the most extensive water conservation and flood control system in the world. In 1917, work began on a system of dams and improved channels to control the floodwaters entering the basin. This program looks at the way this system was built and the problems entailed in its design and construction. (20 minutes)

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Part of the Series : Geology: A Search for Order

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		River Channel Forms This program analyzes the dynamic nature of rivers and the relationship between their forms and processes. It examines the various functions a single river needs to perform, and shows how to measure river form and process, relate the two, and synthes...(more details)		DVD $19.95 DVD + 3-Year Streaming $29.93 3-Year Streaming $19.95
		Glacial Deposits Sediment sequences deposited under glacial conditions during the Pleistocene period cover some 10% of the earth's land surface. This program concentrates on the interpretation of a sediment sequence exposed in a river cliff cut by the River Severn in...(more details)		DVD $19.95 DVD + 3-Year Streaming $29.93 3-Year Streaming $19.95
		Catchment Studies This program follows the route taken by rainwater through a number of different catchments and evaluates the response of these catchments to a rainfall event-a response represented by the flood hydrograph. The program was photographed in the Santa Cl...(more details)		DVD $19.95
		Slopes This program examines some characteristic lakeside slopes that at first sight seem to present a random assortment of shapes and sizes. It attempts to establish whether any order can be discovered in such apparent chaos and to understand the ways in w...(more details)		DVD $19.95
		Limestone Limestone has a great advantage in that its landforms are produced by only one process: solution. This fact can be exploited to provide information on one of the central problems of physical geography: the rate at which landforms develop. In effect, ...(more details)		DVD $19.95

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