Glossary
| Base flow | The sustained or dry weather flow of streams resulting from the outflow of permanent or perched ground water or from the drainage of large lakes and swamps. |
| Branches | The offtaking canals from main canal. |
| Catchment, Basin, Watershed | The area from which a stream or waterway and reservoir receives surface flow which originates as precipitation. |
| Chute spill Radial Gates | Water opening in the form of radial shapes provided at chute spillway. |
| Concrete Gravity Dam | Obstruction created across the river george portion using cement concrete to store water on upstream side. |
| Contour Sheets | Plans showing the natural levels of ground. |
| Cross Drainage (CD) | Local kotar / river crossing canal network. |
| Culturable Command Area | That portion of the culturable irrigable area which is commanded by flow irrigation. |
| Culturable Irrigable Area | The gross irrigable area less the area not available for cultivation. |
| Cumec | Cubic meter per second. |
| Dam Vicinity Plantations | The plantations very close to dam. |
| Depth Zone | Depth of the water required by the crop during complete cultivation period (sowing to harvesting) |
| Design Discharge Capacity | Designed (predetermined) water carrying capacity of canals OR maximum safe discharge capacity of canal. |
| Design Flood Hydrograph | The hydrograph of flow adopted to represent limiting volumes and concentration of runoff for use in determining design capacities of spillways for dams or other hydraulic studies. |
| Distribution system | The offtaking canals from the main canal. |
| Drawdown Level | Fall of the water level in the canal. |
| Effective Rainfall | Rain that produces runoff. |
| F.S.D. | Full Supply Depth. |
| FRL | Full Reservoir Level. |
| GCA | Gross Commond Area. |
| Gross Area | The Total area within the extreme limits set for irrigation by a project system. |
| Gross Command Area | The portion of the gross irrigable area which can be commanded by system for irrigation. |
| Gross Irrigable Area | The gross area less such areas as are excluded from the project by reasons of their being unsuitable for irrigation. |
| Ha. | Hectare ( A unit of area, 1 ha. = 2.47 Acre ). |
| Headworks | Collective term used for all works required at intakes or principal canals to divert and control river flows and to regulate water supplies into the main canal |
| Hilsa Fish | A race of fish. |
| Hydro Power Generation | Power generation from water potential. |
| Hydrograph | A graph showing the discharge with respect of time. |
| Hydrology | Science dealing with waters of the earth in rivers, streams, lakes in or below the earth surface |
| Infiltration | The flow or movement of water through the surface into the soil body or ground. |
| Intensity | The percentage of culturable irrigable area irrigated during a crop or a given period. |
| L.C.M. | Lac Cubic Meter. |
| LPCD | Litre per capita per day. |
| MAF | Million Acre feet. |
| Maximum Probable Rainfall | The rain of a certain amount and duration that can reasonably be expected to occur on a basin with a known frequency. |
| MW | Mega Watt ( a unit of electric power ) |
| MW | 0 Mega Watt ( A unit of electric power ) |
| Orohydrography | The branch of hydrography which deals with the relations of topography to drainage. |
| PAP | Project affected People. |
| Percolation | Movement of water or moisture within the soil through the saturated zone. |
| Precipitation | The total measurable supply of water of all forms of falling moisture. |
| R & R | Rehabilitation & Resettlement. |
| R.L. | Reduced Level. |
| Rainfall | Precipitation in the form of liquid water. |
| Retention | That part of precipitation falling on a drainage area which does not escape as a stream flow, during a given period. |
| River bed Power House | Electric power house constructed to generate electricity at river bed using water stored in reservoir. |
| Rotational Water Supply | Water delivery as per preschedule to the users as per their turn (rotation). |
| Routing | The derivation of an outflow hydrograph of a stream from known values of upstream inflow. |
| Runoff | Portion of total precipitation from a given area that appears in natural or artificial surface streams. |
| Seepage | The slow movement of water through small cracks, pores, interstices etc. in the surface of unsaturated material into or out of a body of surface or subsurface water. |
| Sluices | Opening provided at the bottom part of dam to release water during the lean season to impart benefit to the down stream side. |
| Spillway Capacity | It is the capacity which is balancing the inflow minus storage of FRL |
| Spillway Gates | Gates provide at overflow zone of the dam. |
| SSP | Sardar Sarover Project. |
| Stream | A body of flowing water |
| Synthetic Unit Hydrograph | A unit hydrograph developed on the basis of estimation of coefficients expressing various physical features of a catchment. |
| Terminal Major Dam | The major dam constructed on the river beyond that no such dam can be planned to construct. |
| Unit hydrograph | Hydrograph of storm runoff at a given point on a given stream which will result from an isolated rainfall excess of unit duration occurring over the contributing drainage area and resulting in a unit of runoff. |
| Weir | A structure across the river which allows water to flow over after maximum water level in reservoir. |
| Yield | Total volume or flow from a drainage basin for a long stipulated period of time. |
Post a Comment