Archive for the ‘Water Resources & Irrigation Engineering’ Category
How Canal Alignment should be done ? Canal Alignment should be done in such a way that It should serve the entire area proposed to be irrigated. Cost of construction including cross drainage works should be minimized. A shorter length of canal ensures less loss of head due to friction and smaller loss of discharge […]
Kor watering The first watering is done when the crop has grown to about three centimeters. This watering is known as Kor watering. Kor Period The period during which kor watering is done is known as kor Period.
Drip irrigation Drip irrigation is the delivery of water to the roots of the plant at low flow rates through various types of water applicators by a distribution system located on the soil surface, beneath the surface, or suspended above the ground.
Warabandi system of water management MEANING OF WARABANDI WARABANDI is a rotational method for equitable distribution of the available water in an irrigation system by turns fixed according to a predetermined schedule specifying year, day, time and duration of supply to each irrigator in proportion to the size of his landholding in the outlet command. The […]
Comparison between canals and drains Following are the points of comparison between canal and drains.
Harmful effects of water logging and salinity Harmful effects of waterlogging and salinity are caused by unthoughtful planning of irrigation system. With respect to water logging and salinity, there are following harmful effects:
Definition of salinity When the water table is close to the surface, and the water rises to or very close to the ground surface, evaporates
Definition of waterlogging When the water table rises to such heights that the soil pores in the root zone become saturated, thus displacing the air, the land is said to be water logged.
Definition of irrigation outlet or Mogha or Turn out An irrigation outlet or Mogha in Pakistan or turn out in USA or other countries, is a hydraulic structure conveying irrigation water from a state-owned distributory or a minor to a privately owned water course.
Selection of suitable site for the canal falls For main and branch canals, which do not directly irrigate the fields, the site is determined on the basis of economy in earth works. The excavated earth is used to make banks. This depth of excavation is known as