Help! Manure Management on the Gulf Islands

Is there proper manure management for horses, hobby animals on Gabriola and other Gulf Islands? The answer: slim to none. Most acreages or hobby farms I visit are blissfully unaware of proper manure management techniques.

Our extremely wet, soggy winters and highly porous soil and subsoil structure combined with an uncovered, unmanaged manure pile is a complete recipe for guaranteed groundwater contamination. Not only e-coli and possible pathogens, but nitrate loading of groundwater -- extreme health hazard. Treatment for Nitrates is complex and expensive. Best practice: manage your manure carefully, and avoid problems.

An excellent B.C. resource is http://www.manuremaiden.com/

Prevent leaching -- cover, contain, compost! (image courtesy: manuremaiden.com)

Become a Rain Gardener . . .

On B.C.'s Gulf Islands and in many other rural areas, increased housing developments are creating additional pressures on well water quantity and quality.

There is a growing consciousness that how we care for the surface areas of our properties has a direct impact on groundwater quality. There are regulations in place for restricting pollutants, septic system issues, and manure management that cause groundwater pollution, but there is a lack of direct guidance on landscape maintenance to provide the best rainwater collection and filtration capabilities.

Rain Gardening is an urban stormwater management technique that can be used to inspire thinking along these lines . . . http://www.raingardennetwork.com/ is one resource.

Essentially gardens and yards should be designed to have a diversity of bio-geographically suited grasses, shrubs and trees that help filter and slowly percolate rainwater into the ground. The less monoculture, pavement, channelling and ditching of runoff, and bare, compacted ground areas the better.  Leave your forested areas with a healthy understory of grasses and shrubs.

Home Design & Build -- Cisterns with Bypass/First Rain Diverters!!

In my business, I spend much of my time chatting with islanders, and reminding them of the basic techniques of being a good "rainwater farmer": watching the skies, using simply devised, easy to operate first rain diverters, maintaining treatment systems, and avoiding the plague of tree pollen season. It doesn't take much -- 10 -20 minutes every month for a homeowner to keep their systems operating effectively.

I hope that many of the home builders/designers will take heed too. I visit many homes that have cistern collection pipes hard-plumbed in, so that diverters and bypasses have to be scabbed on as an afterthought. And once a few heavy pollen seasons and decomposing debris build-up in the cisterns, water quality is very poor. It's a shame for beautiful homes to have what amounts to old pond water for their household supply.

If you are in the process of getting a home designed with a cistern built-in to the foundation, be sure to ask your builder to incorporate: 

1. Roof collection rain diverters/bpyass pipes -- so that 10 gallons of "first rain" per every 1,000 sq ft of rooftop collection surface is able to be diverted from your cistern;
2.  Incorporate chamber design into your concrete cistern -- so that one chamber at a time can be isolated, drawn down and cleaned periodically, while still maintaining a supply of water to the house.
3. If separated chamber design is not practical, construct  a sump area or collection well into the cistern so that the rainwater inlet filling  the cistern is partially dammed, calmed and isolated from the rest of the reservoir. A weighted half-height rain barrel would do. That way, rainwater falls into the barrel first (along with debris) before spilling over the submerged edges to fill the cistern.