Summary: 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 England. Techniques of sampling and analysis are illustrated, with emphasis on the measurement of particle size and of particle dip and...
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2009
View online at AVOD
Summary: At ground level, shallow seas, broad beaches, dunes, and waterlogged hollows seem to comprise a chaotic environment. In fact, there is order and form, produced by the interaction of wind, vegetation, and moving sand. Because sand dunes develop rapidly, the development of a landform can be observed. Measuring wind velocity demonstrates how saltation, sand movement, and erosion happen. The...
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2009
View online at AVOD
Summary: 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.
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2005
View online at AVOD
Summary: This program looks at the way soils can vary even within a small area of a forest. A well-developed podzol is examined in detail, with samples taken from the center of each horizon and then analyzed for organic content, soil acidity, mineral content, and particle size distribution. The measurements and analyses demonstrate why three soil profiles can be so very different in closely contiguous...
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2005
View online at AVOD
Summary: 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 synthesize several attributes of the form of a river channel. It examines the differences between low and high flow, and explains how to calculate the...
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2005