|A bone dry pond and parched hills on a nearby property. The|
pond normally fills by December, providing water for grazing cattle.
First, so far this year we have had barely 2" of rainfall, and have had none at all since December 6. That is the longest mid-winter dry stretch in the 150 years that records have been kept. At our 800 ft. elevation we normally average 35 inches of rain per season, most falling between October and April. So what should be emerald green hills saturated with water are instead still golden and parched. Our ground is bone dry except where we can manage some minimal drip irrigation from our low-producing wells. And those wells, which would normally be recharging this time of year, are continuing the drop that started at the end of last year's rains. Long range weather models predict little chance of significant rain this spring.
Second, the previous two seasons have been quite dry so we started out this season in the hole. The 2011-12 and 2012-13 seasons gave us only about 60% of average, so we entered last fall with a two year deficit. We have been through droughts before, notably three years in the mid-70's. But then we got at least 10"-13" of rain each year. Right now 10" would seem like a bonanza.
Third, except for one very cold week most of our fall and winter days have been unseasonably warm and sunny. Temperatures have regularly reached into the 70s. While the tropical temps are pleasant for working outside they quickly dry out plants and soil, requiring us to winter irrigate, something the rains normally do for us. And even that freezing cold week hurt, since cold air is very dry and pulls moisture out of everything.
And fourth, we have had an unusually high number of days of north wind, including several multi-day episodes of horrendously strong blasts. As anyone who lives in northern California knows, north wind is a fiendishly dry, irritating weather occurrence that desiccates plants and people, often blows with destructive force, and makes us all grumpy. In addition to sucking away any moisture we received from our measly rains, the strongest windy spells scoured the floor of our orchard, clearing off most of the fallen leaves and other mulch that normally provide protection for the soil surface.
So we are hoping for the best but preparing as well as we can for the worst. I spread compost and planted a legume cover crop as usual last fall. A couple of light rains were enough to germinate the seed, but since then it has been barely clinging to life.
|This legume cover crop would normally be waist-high|
and lush by now
|Drip irrigation tubing circling a tree|
|One of our four water storage tanks sits on the highest spot|
on our property, providing gravity pressure for drip irrigation.
A rope and float system indicates water level in the tank.
Our original well is pictured below, an old hand dug hole in the ground that is only 36 feet deep, 4 feet in diameter at the bottom and lined with random sandstone rocks placed without mortar. It is likely over 100 years old, and one has to marvel at the immense and dangerous labor required to construct a well like this.
The beauty of a dug well is it's volume - it acts as a storage tank in the ground, accumulating water whenever we're not pumping. We have a solar powered pump in this well, and since it only pumps during daylight the water level recovers overnight. Surprisingly after an average rainfall season this is our best well, holding a steady 12 to 15 feet of water inside. Sadly, during dry years the water level falls sharply and is now only about 2 feet deep in the mornings before pumping.
|Our old hand dug well|