Water Woes

Friday, September 27, 2024

Unfortunately for us, the levels of water in the massive cistern beside the house are low, so we have not been running the desalinator lately, and despite our best water saving efforts we need more …

Until the sea lions (and the massive amounts of poop that comes with them) clear out we aren’t able to fill the cistern with seawater. So…  today, Greg came out with a massive tank of freshwater on the back of the Second Nature to top up our reservoir.

This was a bit of a production as we had to lay out ~ 75m of fire hose from the reservoir to the dock, but we did it, and now we won’t be leaving the next eco-guardian in a lurch.

On another note, we have a returning Elephant Seal. This lady is untagged, and definitely knows her way around the island. We first saw her at 11 am on the jetty, and by 2 pm she was in the grass by the main path to the house.

I hope she sticks around for the weekend!

Weather: Sunny all day, Wind at around 16knts SW all day.

Whale Watching Vessels: 15

Private Vessels: 0

**Loads of Humpbacks close to the Island today 😊

August 21

Wind: every direction throughout the day 0-24 knots
Sea State: calm in morning, rippled in afternoon
Visibility: 0-10 NM
Sky: fog and patches of rain in morning to mid afternoon, partly cloudy in afternoon to evening
Temperature: 12-18 °C
Atmospheric CO2: 412.15 ppm (recorded by NOAA at Mauna Loa Observatory, Hawaii)

The juvenile female elephant seal tagged V173 slid her way up the boat ramp this morning. She is looking healthy and well fed. She has visited several times over the past few weeks, as well as in the spring to moult and briefly in December. She was born last year on Drakes Beach, in Point Reyes National Seashore, in California. Researchers tagged her as a weaned pup on February 28, 2019.

I did some maintenance around the island: changed the oil in the backup generator, tidied paths with the trimmer to make it easier to move fuel and equipment with carts, cleaned the solar panels, washed windows on the main house, and pressure washed the stairs leading up to the door of the lighthouse to get rid of the slippery bird poop. Greg brought 800 litres of fresh water, which we pumped up from the jetty to the fresh water tank.

Here are two photos from today:

New Desalinator and New Adult Female Elephant Seal

Wind: 1-44 knots from NE yesterday to W this evening as the wind increased
Sea State: up to 3 m waves breaking on west side of the island
Visibility: 5-10 NM
Sky: overcast with rain and a few sunny patches today
Temperature: 6-11 °C
Atmospheric CO2: 413.70 ppm (recorded by NOAA at Mauna Loa Observatory, Hawaii)

It was a flurry of activity on the island yesterday. A big change from having no human visitors for a week and a half. Greg brought seven other people on the boat Second Nature. Three volunteers from the college (Lawrence, Sandra and Vincent) came to help with some maintenance and clean up tasks. John and Mike, from Pacific Coast Fire Equipment, were here to do the yearly inspection of the fire extinguishers. Warren and Ric spent almost six hours doing the electrical and plumbing hook ups and tests of the new desalinator. The desalinator room is very cramped quarters with thick concrete walls and only a six foot high ceiling inside. As Race Rocks legend goes, the building was originally constructed as a fallout shelter for Cold War fears of nuclear attack. It apparently contained emergency supplies and two bunks for the lighthouse keeper and assistant keeper. There was no space for their families. In 1975, the building was converted to a water filtration plant.

The non-human activity was busy too, with the arrival of a new adult female elephant seal. She showed up soon after the boat, staying on the boat ramp for a while before coming up to the middle of the island. The alpha male chased her around, they barked a lot, then she settled in the grassy area between the desalinator shed and the flagpole, where she still is this evening. Now there are two suspected pregnant seals hanging out in the centre of the island near the mother, pup and alpha male. The two other males appear to be keeping their distance. One is near the jetty. The other is behind the house by the compost bins.

The desalinator is running well after a total of nine hours of use. This evening, I was delighted to see that it had pumped 600 L of fresh water into the tank. Combined with the 500 L from yesterday, the desalinator has produced more fresh water than has been used since my shift began on December 21. At this rate, the 4,500 L fresh water tank should be filled up in about a week. At that point, the desalinator will be run regularly, but for shorter amounts of time. It’s an energy intensive way to produce water which consists of a reverse osmosis system and secondary UV filter. The temporary method of getting fresh water while the desalinator was out of commission was also very energy intensive. It consisted of filling up a 1,000 fresh water tank at the college, boating it to the island, and pumping it up to the tank from the boat. The water usage is planned to increase a little bit in the near future, due to some much needed pressure washing of the exteriors of the buildings, to prevent them from being overtaken by algae.

See the photos below for some recent views on the island.