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Enviro 11 midterm
Environmental Science 11 Midterm
| Term | Definition |
|---|---|
| Groundwater discharge | the volumetric flow rate |
| Groundwater Recharge | hydrologic process where water moves downward from surface water to groundwater |
| Confined Aquifer | A aquifer that does have a confining layer. |
| Unconfined Aquifer | A aquifer that does not have a confining layer. |
| Artesian well | a confined aquifer containing groundwater under pressure. |
| Water table | the level below which the ground is saturated with water. |
| Infiltration | Liquid moving into the ground though the surface. |
| Percolation | a liquid slowly passing through a filter. |
| Transpiration | the process by which moisture is carried through plants from roots to small pores on the underside of leaves |
| Evaporation | The changing of a liquid into a gas, often under the influence of heat |
| Condensation | the conversion of a vapor or gas to a liquid |
| Watershed / drainage basin | an extent or an area of land where surface water from rain, melting snow, or ice converges to a single point at a lower elevation |
| Divide | Area at the top of a hill or mountain where water moves to one side. |
| Perennial stream | River or stream that flows all year |
| Intermittent stream | River or stream that flows only part of a year. |
| Ephemeral stream | River or stream that flows during or after heavy rain |
| Uplands | an area of high land |
| Stream order | a measure of the relative size of streams. Starting at one and only going higher when the same number meets. |
| Thermal pollution | the degradation of water quality by any process that changes water temperature. |
| Stream flow | the volume of water that moves over a designated point over a fixed period of time. |
| Dissolve oxygen (DO) | the amount of oxygen dissolved in a body of water as an indication of the degree of health of the water and its ability to support a balanced aquatic ecosystem. |
| % saturation | Water content or moisture content is the quantity of water contained in a material. |
| LOD (or LWD) | Wood in a river with a minimum diameter of 4 inches. |
| turbidity | a measure of water clarity |
| Surface run-off | the flow of water that occurs when excess water from rain, meltwater, or other sources flows over the earth's surface. |
| Pool | Still moving water in a river. |
| Eutrophication | excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land. |
| pH | the acidity or alkalinity of a solution on a scale (1 - 14, 7 is neutral), lower values are more acid, and higher values more alkaline (basic). |
| Riparian area | riparian area is the veggitation on the side of a river or stream |
| Random sampling | Taking random samples. Not having a specific idea of where to sample. |
| Substrate | a layer that underlies something, or on which some process occurs, in particular. |
| Rock weir | low dam built across a stream to raise its level or divert its flow. |
| Rip rap | Loose stone used to form a foundation for a water breaker or other structure. |
| Heath Trays | The tray where fish eggs are first put and hatched. |
| Atkins cells | Long narrow trough for fish. |
| Incubation unit | Used for eggs to alevin stage. |
| Rearing tank | Used for feeding the Fry (rearing means to raise the fish) |
| Salmonid | a fish of the salmon family. |
| Header box | Gives a good pressure for the hatchery (Located in the rafters) |
| Capilano trough | The silver trough, used for feeding (rearing means to raise the fish) |
| Adipose fin | a small, fleshy dorsal fin present in certain fishes, notably in the salmon family. |
| Semelparous | the reproductive strategy of an organism. |
| Eyed egg | A fish egg that has grown the eye. The eye is a black dot within the egg. |
| Anadromous | migrating up rivers from the sea to spawn |
| Alevin | a newly spawned salmon or trout still carrying the yolk sack |
| Fry | A small fish that has no yolk sack and has to leave the ground to find food. |
| A.T.U.'s | The calculation of heat given to the fish in the egg stage. |
| Aeration tower (splash tower) | A tower where water splashes though in order to bring air into the water. |
Created by:
Wgemmell
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