| Term No. | Term Name | Term Description |
| 4453 | Tabba, or Taboot | An Egyptian water lifting device for lifts midway between those of sakia and zawafa; actually a rim discharge sakia...... |
| 8568 | Tactics | The elaboration of programmes into specific projects...... |
| 6127 | Tag line | A small cable under tension that keeps the bucket from spinning, swaying, twisting, or drifting...... |
| 6780 | Taiga | Flat, marshy subarctic forest, usually of spruce, firs or pine trees. The area between the tundra and the steppe or between tundra and deciduous fores..... |
| 3292 | Tail | 1 - The end of a canal. 2 - The term is also applied to the work constructed at the end of a canal for the distribution of water thereat...... |
| 3663 | Tail cluster | Two or more outlets at the tail of a distributing channel (illustrated)...... |
| 8702 | Tail control | A device to control the water slope and level at the end of a model by either a mechanically operated gate or some other arrangements...... |
| 4055 | Tail drain, or Waste ditch | A furrow or small ditch at the lower edge of an irrigated field for collecting surplus water for either removal or redistribution...... |
| 3572 | Tail escape | 1 - An escape built at the tail of a canal to discharge surplus water to maintain the required full supply level, to scour the silt deposited in, and/..... |
| 3614 | Tail gates, Outer gates, or Lower gates | Lock gates on the lower water-level side of the lock...... |
| 3406 | Tail inlet transition | The transitions provided upstream of a tail structure or at the tail end of, and contained within, the conduit length...... |
| 3407 | Tail outlet transition | The transitions provided partly or wholly downstream of a tail structure or tail end of a conduit...... |
| 2694 | Tail race, or After-bay | A channel conducting water away from a water wheel or water turbine at the end...... |
| 3291 | Tail reach | The last reach of a canal, i.e. the portion from the last control point to the tail...... |
| 3588 | Tail regulator, or Outfall regulator | Regulator built at the outfall or tail of a waste channel...... |
| 3666 | Tail tank | A reservoir supplied with water from a canal whenever in excess of canal requirements, having its own command and usually situated near the tail of a ..... |
| 4647 | Tail tank | A reservoir having water supply from a canal when the flow conveyed is in excess of the requirements. The tank situated near the tail of the canal sup..... |
| 3405 | Tail transitions | A transition or system of transitions provided at the tail end of a conduit or at a tail structure...... |
| 3705 | Tail wall | A wall of masonry or concrete built at the downstream end of an outlet, containing the exit opening of the orifice or trough discharging into the deli..... |
| 1575 | Tail water erosion | Linear erosion due to disturbance in sediment movement towards downstream, resulting in depletion of sediments required to reach the transportation ca..... |
| 3995 | Tail-enders | Farmers having their fields/farms located far away towards the tail or end of a water distribution channel in an irrigation system, thereby being susc..... |
| 3670 | Tailwater | Water level at the head of the watercourse or farm lateral just below the outlet...... |
| 2869 | Tailwater rating curve, or Downstream stage discharge curve | A curve showing relationship between the discharge and the corresponding tailwater stage...... |
| 3480 | Take-off distributor, Take-off divisor, or Take-off divider | Device placed in the offtake structure where volume of water to be diverted is only a small fraction of the water flowing in the parent channel, the v..... |
| 3920 | Taking-off place | A horizontal platform near the water surface level where the cattle or traffic get into the canal. In case of very small canals, landing place and tak..... |
