Fig. 1. He'eia Fishpond standardized bathymetry map.  

Fig. 1. He'eia Fishpond standardized bathymetry map.  

Bathymetry the measurement of the depth of water in oceans, seas, or lakes.

Bathymetry is the underwater equivalent to topography. 

    Figure 2. Shown is a spring tide. At flood tide (High Tide) = 311,170 m3 and ebb tide (Low Tide) = 93,329 m3

Figure 2. Shown is a spring tide. At flood tide (High Tide) = 311,170 m3 and ebb tide (Low Tide) = 93,329 m3

Riding around on a surfboard, we (Sarah Vasconcellos, PIPES fellow) used a measuring stick and a GPS to map the depth of the pond along transect sites (Fig. 1)

In Heʻeia Fishpond, the depth ranges from 0.1 to 0.7 meters, with the deepest part of the pond in the NW corner near the mangrove island.

We used this data to calculate the volume of Heʻeia Fishpond (area x depth = volume). We found the volume of the loko iʻa to be tidally influenced (Fig. 2)