Download Agricultural nonpoint source pollution : watershed by William F. Ritter, Adel Shirmohammadi PDF

By William F. Ritter, Adel Shirmohammadi

Content material: Hydrology / Mary Leigh Wolfe -- Soil erosion and sedimentation / Mark A. Nearing, L. Darrell Norton, and Xunchang Zhang -- Nitrogen and water caliber / William F. Ritter and Lars Bergstrom -- Phosphorus and water caliber affects / Kenneth L. Campbell and Dwayne R. Edwards -- insecticides and water caliber affects / William F. Ritter -- Nonpoint resource toxins and cattle manure administration / William F. Ritter -- Irrigated agriculture and water caliber affects / Blaine R. Hanson and Thomas J. Trout -- Agricultural drainage and water caliber / William F. Ritter and Adel Shirmohammadi -- Water caliber types / Adel Shirmohammadi ... [et al.] -- most sensible administration practices for nonpoint resource toxins keep an eye on / Saied Mostaghimi ... [et al.] -- tracking / William L. Magette

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Shaw, E. , Hydrology in Practice, Chapman & Hall, London, 1994. 55. Serrano, S. , Lexington, KY, 1997. 56. Todd, D. , Groundwater Hydrology, 2d. , Wiley, New York, 1980. © 2001 by CRC Press LLC 2 Soil Erosion and Sedimentation Mark A. Nearing, L. D. 1 INTRODUCTION Soil erosion includes the processes of detachment of soil particles from the soil mass and the subsequent transport and deposition of those sediment particles on land surfaces. Erosion is the source of 99% of the total suspended solid loads in waterways in the United States1 and undoubtedly around the world.

The relationships should not be expected to hold up in areas where very dissimilar soils occur, such as the tropics. Likewise, the topographic factors were developed from relatively moderate slope lengths and gradients and may not hold up for steep lands. In many areas, the rainfall erosivity factor is difficult to obtain because of limited data. Cropping and management factors must be determined experimentally, and much effort is needed to obtain data for different systems throughout the world.

34. Slack, D. C. and Larson, C. , Modeling infiltration: the key process in water management, runoff, and erosion, in Tropical Agricultural Hydrology, Lal, R. and Russell, E. , New York, 1981. 35. , Soil and Water: Physical Principles and Processes, Academic Press, New York, 1971. 36. McWhorter, D. , Vertical flow of air and water with a flux boundary condition, Trans. ASAE, 19, 259, 1976. 37. Brustkern, R. L. and H. J. Morel-Seytoux, Description of water and air movements of soils, J. , 24, 21, 1975.

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