inundation / seasonal canal

• Seasonal canals provide water to fields in summer when the donner rivers are in flood
• These canals open in the rainy season and close in winters
• Seasonal canals are beneficial for kharif crops
• Rabi crops benefit from the moisture left in the land from summer flooding
• These canals irrigate the active floodplains where the land is sufficiently leveled and downward slopes from the river banks
• The main network of these canals is in Sindh and southern Punjab
• Bar upland areas are not served by these canals as they cannot rise up 5 to 7 meters high bluff separating the floodplains and the bar upland
• Advantages

  1. To reduce the flood pressure.

  2. Useful for lower areas like Sindh and southern Punjab.
• Disadvantages

  1. Do not supply water through out the year.

  2. Single crop is cultivated.

  3. Do not supply water to upland areas.