What is the volume of a koi pond

If 50 gallons raises water level 1”?

you can calculate the cross sectional area

but not enough data to find the volume
... is it one foot or ten feet deep?

14” deep

To calculate the volume of a koi pond, you'll need to know the amount of water needed to raise the water level by a specific amount. In this case, you mentioned that 50 gallons of water raises the water level by 1 inch.

To proceed, you can use a simple formula:

Volume = Area × Height

The first step is to calculate the area of the surface of your koi pond. The shape of the pond will determine the formula you need to use to find the area. For example, if it is a rectangular pond, you can use the formula:

Area = Length × Width

If it is a circular pond, you can use the formula:

Area = π × Radius²

Once you have the area and height (which is the amount of water required to raise the water level by a certain amount), you can multiply them together to find the volume.

Let's take an example: Suppose the pond is rectangular with a length of 10 feet and a width of 5 feet. The water level increases by 1 inch (which is approximately 0.0833 feet) with 50 gallons of water.

Step 1: Calculate the area:
Area = Length × Width
Area = 10 ft × 5 ft
Area = 50 square feet

Step 2: Convert the height from inches to feet:
Height = 1 inch ÷ 12
Height = 0.0833 feet

Step 3: Calculate the volume:
Volume = Area × Height
Volume = 50 sq ft × 0.0833 ft
Volume ≈ 4.17 cubic feet

So, the volume of this rectangular koi pond is approximately 4.17 cubic feet.

Remember to adjust the calculations based on the shape and dimensions of your specific koi pond.