Watershed Management

A farm pond is designed to store water for irrigation. The top surface area of the water is $1200\text{ m}^2$, the bottom bed area is $400\text{ m}^2$, and the total depth is $3.0\text{ m}$. Using the prismoidal formula $V = \frac{d}{6} (A_1 + 4 A_m + A_2)$ where $A_m$ is the area at mid-depth (assuming linear dimension scaling), the storage capacity in $\text{m}^3$ is ________ (round off to nearest integer).