This data set is the precipitation observation data of Nanxiaohegou basin from 2001 to 2010. The data includes daily precipitation observation data, precipitation extraction data and maximum precipitation data of each period (extracted by minutes and hours, table 2 is extracted by minutes, table 3 is extracted by hours).
There are SM1 ordinary rain gauge with diameter of 20cm and dsj-2 siphon self recording rain gauge. SM1 adopts 8:00 and 20:00 two-stage system for annual observation, mainly observing the beginning and ending time of precipitation, and counting the precipitation. When the intermittent time of precipitation is more than 15 minutes, it is recorded as two precipitation observations, and when the intermittent time is less than 15 minutes, it is regarded as a precipitation observation record. If a precipitation crosses 8:00 and 20:00, it should be measured at 8:00 and 20:00. Dsj-2 adopts 24 segment system for flood season observation. In case of failure of self recording rain gauge, the observation data of ordinary rain gauge are used to supplement.
Precipitation observation instruments include SM1 ordinary rain gauge with a diameter of 20cm and dsj-2 siphon type self recording rain gauge. The SM1 type adopts the 8-hour and 20-hour two-stage system for annual observation. It mainly observes the start and end time of precipitation and makes statistics of precipitation. When the intermittent time of precipitation is more than 15 minutes, it is recorded as two precipitation observations before and after the interval, and when the interval time is less than 15 minutes, it is recorded as one precipitation observation. If a precipitation crosses 8 hours and 20 hours, it should be measured at 8 hours and 20 hours. Dsj-2 adopts 24 section system for flood season observation. In case of the failure of the self recording rain gauge, the observation data of the ordinary rain gauge is used for supplement.
The self recording rain gauge is calibrated before the beginning of flood season every year. In the process of observation, when there is an abnormal value in the self recording rain gauge, the observed value of the ordinary rain gauge is used for interpolation. In the process of integration and input of observation data, there are four levels of manual verification, which are tabulation, primary calibration, recalibration and audit, to ensure the data quality.
This work is licensed under
CC BY 4.0 (Creative Commons Attribution 4.0 International License).
CSTR:11738.11.ncdc.HWXFZhan.2020.99
10.12072/ncdc.HWXFZhan.db0045.2020
