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Nullah. A nullah or nala (Hindustani or "nallah" in Punjabi) is an 'arm of the sea', stream, or watercourse, a steep narrow valley. Like the wadi of the Arabs, the nullah is characteristic of mountainous or hilly country where there is little rainfall. In the drier parts of India and Pakistan, and in many parts of Australia, there are small ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 8 September 2024. River in Asia "Indus Valley" redirects here. For the Bronze Age civilisation, see Indus Valley Civilisation. For other rivers named Indus, see Indus (disambiguation) § Rivers. "Indus" and "Sindhu" redirect here. For other uses, see Indus (disambiguation) and Sindhu (disambiguation ...
The urban areas of the Indus Valley civilization included public and private baths. Many of the buildings at Mohenjo-Daro had two or more stories. They also had a sophisticated drainage system to dispose waste materials out of town. The earliest evidence of urban sanitation was seen in Harappa, Mohenjo-daro, and the recently discovered Rakhigarhi.
In any doab, khadar land (green) lies next to a river, while bangur land (olive) has greater elevation and lies further from the river. Khādir or Khadar and Bangar, Bāngur or Bhangar (Hindi language: खादर और बांगर, Urdu languageکهادر اور بانگر) are terms used in Hindi, Urdu, Punjabi and Sindhi in the Indo-Gangetic plains of North India and Pakistan to ...
Drainage density is a quantity used to describe physical parameters of a drainage basin. First described by Robert E. Horton, drainage density is defined as the total length of channel in a drainage basin divided by the total area, represented by the following equation: [1] The quantity represents the average length of channel per unit area of ...
Groundwater recharge or deep drainage or deep percolation is a hydrologic process, where water moves downward from surface water to groundwater. Recharge is the primary method through which water enters an aquifer. This process usually occurs in the vadose zone below plant roots and is often expressed as a flux to the water table surface.
Irrigation (also referred to as watering of plants) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been developed by many cultures around the world. Irrigation helps to grow crops, maintain landscapes ...
Drainage. High-density polyethylene pipe installation in a storm drain project, Mexico. Drainage is the natural or artificial removal of a surface's water and sub-surface water from an area with excess water. The internal drainage of most agricultural soils can prevent severe waterlogging (anaerobic conditions that harm root growth), but many ...