ENCYCLOPEDIA OF ENVIRONMENTAL SCIENCE AND ENGINEERING - SEDIMENT TRANSPORT AND EROSION ppt

... S SEDIMENT TRANSPORT AND EROSION INTRODUCTION The literature on the subject of erosion and sediment transport is vast and is treated in the publication of such disciplines as civil engineering, ... (1) and (2) and include contour farm- ing, contour furrowing of range land, contour strip-cropping, use of gradient and level terraces, use of diversion...

Ngày tải lên: 10/08/2014, 20:20

... (schematic) as function of time of day, over city and country. 50 40 30 20 0 5 10 15 20 Time of day 100-T, (%) FIGURE 7 Concentrations of air pollution (100-T%), as function of time of day, on clear ... The first term on the right-hand side represents the rate of formation of particles of volume v due to coagulation, and the second term that rate of loss of partic...

Ngày tải lên: 01/04/2014, 11:44

... acidification and that the acid rain is pri- marily the result of long-range transport of pollutants from the heavily industrialized areas of northern Europe. The rain and snow in portions of eastern ... R.A. (1872), Air and Rain: The Beginnings of a Chemical Climatol- ogy. Longmans, Green, and Co., London, England. Stensland, G.J. and R.G. Semonin (1982), Another i...

Ngày tải lên: 10/08/2014, 20:20

... The first term on the right-hand side represents the rate of formation of particles of volume v due to coagulation, and the second term that rate of loss of particles of volume v by coagulation ... light-scattering properties of an individual particle are a function of its size, shape and refractive index. The intensity of scattered light is a function of the scat...

Ngày tải lên: 10/08/2014, 20:20

... competition. (HbCO) (HbO) 210 PC O PO 22  (HbCO) and (HbO 2 ) are the concentrations of carboxyhemo- globin and oxyhemoglobin, and PCO and PO 2 are the partial pressures of carbon monoxide and oxygen. Inspiration of air containing ... presence of different con- centrations of ambient carbon monoxide and the effect of various levels of activity on the rate of u...

Ngày tải lên: 10/08/2014, 20:20

... of time of day, over city and country. 50 40 30 20 05101520 Time of day 100-T, (%) FIGURE 7 Concentrations of air pollution (100-T%), as function of time of day, on clear day (solid line) and ... (m) A - EXTREMELY UNSTABLE B - MODERATELY UNSTABLE C - SLIGHTLY UNSTABLE D - NEUTRAL E - SLIGHTLY STABLE F - MODERATELY STABLE A B C D E F A - EXTREMELY...

Ngày tải lên: 10/08/2014, 20:20

... methods for control of selenium and its compounds. However, based on the properties and on the methods of recovery and purification of selenium wet scrubbers and high- voltage electrostatic ... contribution of vanadium in the lignite deposit and the ash Use of additives: Use of magnesium oxide in oil-fired burners, resulting in the reduction of fine particulat...

Ngày tải lên: 10/08/2014, 20:20

... their flora and fauna become those of vernal ponds. In examining some aspects of the productivity of these five lakes, the variation in both the intensity of photosyn- thesis and the depth ... to apply his law of the minimum as rigidly as some have interpreted it, and we can best envision nutrient limitation from the standpoint of the balance and interac- tions of t...

Ngày tải lên: 10/08/2014, 20:20

... polycyclic aromatic ketones and quinines, steroids, N-containing com- pounds, regular steranes, pentacyclic triterpanes, and iso- and anteiso-alkanes (Seinfeld and Pandis, 1998). Secondary organic ... condensation of low-vapor-pressure oxidation products of organic gases. The first step in organic-aerosol production is the formation of the low-vapor-pressure compound in t...

Ngày tải lên: 10/08/2014, 20:20

... primarily of bacteria, protozoa, and fungi, coats the surface of filter media. The activity in biological film is aerobic, with move- ment of oxygen, food and end-products in and out of it as ... Municipal Wastewater, Encyclopedia of Environmen- tal Science and Engineering, Vol. 1, edited by J. R. Pfafflin and E.N. Ziegler, Gordon and Breach, New York. 2. Gates,...

Ngày tải lên: 10/08/2014, 20:20