PPT-APPLIED GEOMORPHOLOGY CYCLE OF EROSION - PENCK

Dr BANU SUYA Assistant Professor amp Head Department of Geography Government College for Women A. Soil erosion and sediment control is not a new technology The USDA Soil Conservation Service and a number of State and local agencies have been developing and promoting the use of erosion and sediment control devices for years This chapter provides o O to 1 O = o I H i w GEOLOGICAL Geomorphology By RICHARD J. THEORETICAL GEOLOGICAL UNITED UNITED Secretary GEOLOGICAL Director For CONTENTS Page 648952 62 THEORETICAL PAPERS GEOMORPHOLOGY NORMAL CYCLE OF EROSION. BY. . W.M.Davis. 1. A HIGHLY INFLUENTIAL MODEL OF . RELIEF/LANDFORM EVOLUTION AND . EVENTUAL PLANATION . INTRODUCED TO GEOMORPHOLOGY. . BY . WILLIAM MORRIS DAVIS . IN . 1899. The life cycle of a river helps explain how it acts as an agent of erosion.. It should be obvious that the force of running water will create erosion in the first place. Running water will physically move objects and “carve” or erode rock formations if the motion and volume of water is continual. In the “youth” stage of river cycle, a river does just this: It carves out a path to it’s final destination over rock formations, wearing away the land as it does so. . Objectives. Learn basic concepts of sediment transport and fluvial geomorphology. Understand sediment budgets (sources, sinks, pathways for sediment). Discuss infrastructure and ecosystem response. 1. Denition :Anr-cycleisdenotedby(i1i2:::ir):Example :11=(1)1cycle1212=(1)1cycle1221=(12)2cycle123321=(13)2cycle123231=(123)3cycle12344312=(1423)4cycle1234535421=(13425)5cycle12345 Chapter 7. Section 7.1 Weathering. Weathering is the process by which rocks on or near Earth’s surface break down and change. . Erosion is the removal and transport of weathered material from one location to another.. The . surface. features of the Earth change as a result of observable physical and chemical processes . Weathering and Erosion. This is a monument . called Cleopatra’s . Needle. It was carved in Egypt around 1450B.C. The sides are carved with hieroglyphs, the writing of ancient Egypt. It stood in the dry, hot Egyptian desert for over 3000 years. During that time, the hieroglyphs remained distinct.. another.. 2 . kinds:. 1) . Rill erosion. is the erosion by running water in small channels. , on the side of a slope.. 2) . Gully erosion. is when a rill channel evolves to become deep and wide.. . (“Flow-Assisted”. . or “Flow-Accelerated”. . Corrosion). An increase in corrosion brought about by a high relative velocity between the corrosive environment and the surface.. Removal of the metal may be:. WHAT IS COASTAL EROSION? Coastal erosion is the endless reshaping of shorelines by waves, currents, tides, storms, ice, rain and groundwater seepage. Human activities, like construction, dredging, CO CYCLE OF EROSION. . . . Dr. B.ANU. SUYA,. Assistant Professor & Head,. Department of Geography,. Government College for Women (A),. W.M. DAVIS. . . . Dr. B.ANU. SUYA. ,. Assistant . Professor & Head,. Department . of Geography,. Government . Geomorphology (. GEO 301). Geology and Geophysics Department. College of Science. King Saud University. What do you see on the Earth’s Surface. We see various types of landforms on the Earths surface .