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Ponds

Small ponds ranging from a quarter to a few acres in size are abundant in Nevada County.  Management of a pond is based on the purposes of the pond, whether it is for fishing, wildlife, swimming, aesthetics, or other purposes.  Managing a pond challenges the owner or manager to maintain a particular condition in a situation in which the pond is in a continual process of succession.  Or, one might choose to leave the pond alone and let nature take its course.
 
Aquatic weed infestations adversely affect fish, wildlife, hunting, fishing, boating, recreation, irrigation, and drainage. Weeds provide a breeding ground for mosquitoes and give water an unpleasant taste, odor, and color. Heavy infestation may render an area unsuitable for fish by exhausting dissolved oxygen in the water by blocking sunlight essential to basic food production, by restricting the movement of fish, or by rendering shallow water unsuitable for spawning. Excessive weed growth interferes with the recreational use of lakes and ponds. Heavy infestations may restrict water flow in irrigation canals or drainage ditches.

The primary factors that influence the growth of aquatic weeds are water depth, bottom type, nutrient level, and water clarity.  Factors vary from one body of water to the next and are influenced by the surrounding watershed.  The age of the pond, the weather, runoff, drought, sunlight, human activities, erosion leading to increased sedimentation, discharges, hard surfaces such as roads, etc. all contribute to heavy weed growth.
Documents
The Good,
The Bad,
The Ugly