Titlebook: Drainage Design; Peter Smart,J. Graham Herbertson Book 1992 Springer Science+Business Media New York 1992 attention.developing countries.f

漂浮

maintenance

希望

Robert R. Korfhage,Margaret A. Korfhagely, the hydrological events producing superfluous water may be an intensive local storm, the accumulation of excess rainfall over a wet spell of a few days or, on a longer time scale, the seasonal flood from warm rain falling on a melting winter snow pack lying on frozen ground. A whole range of events lies between these extremes.

闖入

Virus Infections and Diabetes Mellitust possible without irrigation. These two features, high rainfall intensity and irrigation, can lead to drainage problems specific to these areas. This chapter examines drainage design for erosion control in areas of high rainfall intensity and for the control of waterlogging and salinity in irrigated arid and semiarid areas.

柔聲地說

擴張

Deep drainage,mates such as large areas of Africa and the Middle East where there are no perennial water courses, the role of groundwater attains a greater significance because it is the only reliable source available to man.

pacific

linear

Field drainage in non-temperate climates,t possible without irrigation. These two features, high rainfall intensity and irrigation, can lead to drainage problems specific to these areas. This chapter examines drainage design for erosion control in areas of high rainfall intensity and for the control of waterlogging and salinity in irrigated arid and semiarid areas.

gimmick

Dewatering,o needed for some permanent works such as slopes and dams. This chapter gives a review of the subject and further information can be found in Bell (1987), BS 5930 (1981), Cripps .. (1986), Hanrahan .. (1989), ICE (1982, 1987, 1989), Patrick Powers (1981), Somerville (1986) and Weltman and Head (1983).

Incommensurate

Herpes Simplex Virus and Immunitymates such as large areas of Africa and the Middle East where there are no perennial water courses, the role of groundwater attains a greater significance because it is the only reliable source available to man.