How many hours can you irrgate on a farmland of 20000 meter squared, with pump delivery of 600l/min and evapotranspiration of 25l/meter square/week ?

To calculate the total amount of water needed for irrigation on a farmland of 20000 square meters, we first need to determine the weekly water requirement.

Given:
- Area of farmland = 20000 square meters
- Pump delivery rate = 600 liters/minute
- Evapotranspiration rate = 25 liters/square meter/week

First, calculate the total water requirement per week for the entire farmland:
Total water requirement = Area of farmland * Evapotranspiration rate
Total water requirement = 20000 square meters * 25 liters/square meter/week
Total water requirement = 500000 liters/week

Next, calculate the time required to pump this amount of water using the pump delivery rate:
Time required = Total water requirement / Pump delivery rate
Time required = 500000 liters / (600 liters/minute)
Time required = 833.33 minutes

Therefore, you can irrigate a farmland of 20000 square meters for approximately 833.33 minutes or approximately 13.89 hours with a pump delivery rate of 600 liters/minute and an evapotranspiration rate of 25 liters/square meter/week.

Step 1: Calculate the daily evapotranspiration.

Evapotranspiration for 20,000 m² = 25 l/m² x 20,000 m² = 500,000 liters/day

Step 2: Calculate the number of days to irrigate.

Assume one irrigation event per week (7 days).

Step 3: Calculate the total volume of water required.

Total water required = Evapotranspiration per day x Number of days = 500,000 liters/day x 7 days = 3,500,000 liters

Step 4: Convert liters to hours of irrigation.

Pump delivery rate = 600 l/min = 36,000 liters/hour

Hours of irrigation = Total water required / Pump delivery rate = 3,500,000 liters / 36,000 liters/hour ≈ 97.22 hours

Therefore, you can irrigate a farmland of 20,000 m² for approximately 97 hours with a pump delivery of 600 l/min and an evapotranspiration of 25 l/m²/week.