ABSTRACT
Soil erosion and resulting sedimentation problems continue to be major concerns throughout the world. Dregne (1972) evaluated the general state of soil and land degradation worldwide in the 1970s. Much of Southwest Asia, large areas of China, India and Southeast Asia, Northern Africa, Central America, and Mexico suffer
10.1 Magnitude and Economic Impacts of Soil Erosion ...................................... 227 10.2 Measuring Costs and Benefits ......................................................................230 10.3 Types and Measures of Environmental Economic Value ............................. 233 10.4 Case Studies .................................................................................................. 235
10.4.1 Soil and Land Degradation and Ag Growth Model (Case 1) ........... 235 10.4.1.1 Analysis and General Results ............................................ 237 10.4.1.2 Summary and Conclusions ................................................ 238 10.4.1.3 Follow-Up Analysis ........................................................... 239
10.4.2 DR Valdesia Hydro Reservoir Sedimentation (Case 2) .................... 239 10.4.2.1 Study Methodology ............................................................240 10.4.2.2 Results and Implications of Analysis ................................. 241
10.4.3 Some Ohio Evidence of Soil Erosion Off- Site Economic Impacts (Case 3) ............................................................................... 243 10.4.3.1 Methods and Results of Studies ......................................... 243
10.4.4 OSU Studies on Ohio Downstream Benefits of CRP (Case 4) .........245 10.4.4.1 Methods and Results of Studies .........................................245
10.5 Summary and Conclusions ...........................................................................250 Abbreviations ......................................................................................................... 252 References .............................................................................................................. 252
