The total land area of Pakistan is approximately 310,322 square miles or 88 million hectares of land, of which approximately 20 million heaters are used for agriculture purposes.
The river system of Indus and its tributaries provides Pakistan some of the most fertile land in the Indian subcontinent.
Under the Indus Water Basin Treaty of 1960 three eastern rivers namely: Sutlej, Beas and Ravi were allocated to India for its exclusive use. The Treaty gives Pakistan control over the western rivers namely: the Indus, Jhelum and Chenab. India has also been allowed to develop 13,43,477 acres of irrigated cropped area on the western rivers without any restriction on the quantum of water to be utilised.
India has already developed 7,85,789, acres for which 6.75 MAF has been used. Thus, for the remaining area of 5,75,678 acres, 4.79 MAF would be required on pro rata basis.
The water availability in our rivers is highly erratic and unreliable. The highest annual water availability in the recorded history 1922 todate was 186.79 MAF (million acre feet) in the year 1959-60 as against the minimum of 95.99 MAF in the year 2001-2002.
This includes the Kabul River contribution. The Kabul River contributes a maximum of 34.24 MAF and a minimum of 12.32 MAF with an annual average of about 20.42 MAF to Indus main.
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We have entered into 21st century with world's largest and unified irrigation system that consists of three major reservoirs (Chashma, Mangla, and Tarbela); 19 barrages (Ferozepur, Sulemanki, Islam, Balloki, Marala, Trimmu, Panjnad, Kalabagh, Sukkur, Kotri, Taunsa, Guddu, Chashma, Mailsi, Balloki, Sidhnai, Rasul, Qadirabad, and Marala); 12 link canals; 45