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COMPILATION NOTES

1. The main portion of the Year Book includes:

(1) Summary of Hydrological Features in Taiwan.

(2) The streamflow records and sediment records of 136 stations of 1990.

(3) Records of surface water quality, including water quality at intakes of water supply works and for rivers.

2. It is appreciated to note that the streamflow records and sediment records of the stations were provided by the Taiwan Provincial Water Conservancy Bureau, Taiwan Power Company, and Shihmen Reservoir Administration; water quality data were provided by the Taiwan Water Pollution Control Agency, Taiwan Water Supply Corporation and Taipei Water Department, a part of river water quality data were collected by this Commission.

3.Computer processing method has been used to compile the data of daily mean discharge and suspended sediment in the series of the Year Books since 1977 for the purpose of saving manpower and increasing accuracy.

4.This Year Book also includes: Locution map of the existing streamflow gaging stations (Appendix 1); List of streamflow gaging stations (Appendix 2); Charts showing recording periods (Appendix 3); Location map of river water quality sampling sites (Appendix 4).