| 流速量測 | Current Measurement |
| 流速儀 | Current Meter |
| 資料漂浮 | Data Buoy |
| 水尺基準點校正 | Datum Correction |
| 全深取樣器 | Depth-integrating Suspended-sediment Sampler |
| 差壓式流速儀 | Differential Pressure Type Current Meter |
| 流量係數 | Discharge Coefficient |
| 流量量測 | Discharge Measurement; Stream Gauging |
| 全潮流量觀測 | Discharge Measurement of Tidal Day |
| 流量站 | Discharge Site |
| 視距測量法 | Distance by Stadia |
| 都卜勒效應 | Doppler Effect |
| 洩降 | Drawdown |
| 漂流浮標 | Drifting Buoy |
| 雙偏極化雷達 | Dual Polarimetric Radar |
| 回聲測深儀 | Echo Sounder |
| 電磁式流速儀 | Electromagnetic Current Meter |
| 爾泊效應 | Epper Effect |
| 蒸發皿 | Evaporation Pan |
| 蒸發皿係數 | Evaporation Pan Coefficient |