Water Logging and Salinity
WATER LOGGING AND SALINITY
Naheed Ghazanfar Izhar & Associates Consulting
5.1 CLASSIFICATION OF WATER LOGGED AND SALINE AREAS BY DEGREE
The existing irrigation system in Khyber Pakhtunkhwa was developed in late 1800s over a century ago. This system was designed for the farming at that time which was much lower than the cropping intensities of today. This system had limited provision for drainage, resulting in a rise in groundwater and the occurrence of salinity.
|Table 5.1 |
|Area Irrigated by Canals and Tube Wells |
|Canal name |Area Hectares |% Total |
|Kabul River System |
|Kurvi Branch |5,472 |19 |
|Wazir Garhi |2,160 |7 |
|Pabbi Minor |2,234 |8 |
|Kabal River Canal |7,229 |25 |
|Total - A |17,095 |59 |
|Warsak Gravity Canal |
|Warsak Gravity Canal |11,188 |38 |
|Pabbi Minor |909 |3 |
|Total - B |12,097 |41 |
|Tube Wells** |137 | |
|Note: The capacity of TWs varies 1/4 to 1/2 cusecs |
|Source Khyber Pakhtunkhwa Statistics 2010 |
Water logging and salinity problems have resulted from arid climate, topography, seepage from unlined canals, poor water management, inadequate drainage, insufficient irrigation supplies and use of poor quality drainage water. Areas with water table depths that vary in different periods; from 1978 to 1998 areas with depth less than
Naheed Ghazanfar Izhar & Associates Consulting
5.1 CLASSIFICATION OF WATER LOGGED AND SALINE AREAS BY DEGREE
The existing irrigation system in Khyber Pakhtunkhwa was developed in late 1800s over a century ago. This system was designed for the farming at that time which was much lower than the cropping intensities of today. This system had limited provision for drainage, resulting in a rise in groundwater and the occurrence of salinity.
|Table 5.1 |
|Area Irrigated by Canals and Tube Wells |
|Canal name |Area Hectares |% Total |
|Kabul River System |
|Kurvi Branch |5,472 |19 |
|Wazir Garhi |2,160 |7 |
|Pabbi Minor |2,234 |8 |
|Kabal River Canal |7,229 |25 |
|Total - A |17,095 |59 |
|Warsak Gravity Canal |
|Warsak Gravity Canal |11,188 |38 |
|Pabbi Minor |909 |3 |
|Total - B |12,097 |41 |
|Tube Wells** |137 | |
|Note: The capacity of TWs varies 1/4 to 1/2 cusecs |
|Source Khyber Pakhtunkhwa Statistics 2010 |
Water logging and salinity problems have resulted from arid climate, topography, seepage from unlined canals, poor water management, inadequate drainage, insufficient irrigation supplies and use of poor quality drainage water. Areas with water table depths that vary in different periods; from 1978 to 1998 areas with depth less than