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COMPILATION NOTES

1. The main portion of the 1999 Year Book includes:

(1).Summary of hydrological features in Taiwan.

(2).Streamflow records and suspended sediment records.

(3).Records of water quality, including surface water quality at intakes of water supply work and rivers, as well as groundwater quality.

2. Streamflow and sediment records were provided by the Water Conservancy Agency Ministry of Economic Affairs, Taiwan Power Company, Northern Water Resources Bureau and Feitsui Reservoir Administration Bureau; and water quality data were provided by the Environmental Protection Administration, Taiwan Water Supply Corporation and Taipei Water Department.

3. Since 1977, a computer program was developed to compile mean daily discharge and suspended sediment to save labor cost and to increase overall accuracy.

4. This Year Book also includes: List of streamflow gauging stations (Appendix 1); and Charts showing recording periods (Appendix 2).

5. The processing principle of data statistics of the flow:

(1).When data in some months is lack of being measured: the data like ten-day flow, monthly totality and monthly average can be regarded as the data lack of being measured and will be marked [*] in annual report. The biggest monthly flow, the smallest monthly flow, the biggest momentary flow and their occurred date shall be statistics and be marked @ in the column of database. Only if the data is lack of being measured in whole month, then it will be marked [*].

(2).When data in some years is lack of being measured: the data like yearly average flow and yearly total flow will not be statistics, will be regarded as the data lack of being measured and will be marked [*] in annual report. But the biggest daily flow, the smallest daily flow, the biggest momentary flow and their occurred date shall be statistics and be marked @ in the column of database and annual report.

(3).The above mark has to be showed up with the above number in column forever while being statistics in past years.