This data set is the runoff and sediment observation data of qiaozigou watershed in the third sub region of Loess Hilly and gully region from 1987 to 1990. The runoff and sediment yield are calculated by water level observation and sediment sampling at runoff station. The data set includes the measured discharge results of Qiaozi Donggou and Qiaozi xigougou calibre flow stations, the extract table of flood hydrological elements, the successive flood test results, the daily average discharge table, the daily average sediment concentration table and the daily average suspended sediment transport rate table.
|collect time||1987/01/01 - 1990/12/31|
|collect place||Qiaozigou, Luoyugou watershed, Qinzhou District, Tianshui City, Gansu Province|
|altitude||1235.0m - 1666.5m|
|data size||766.3 kB|
|Data time resolution||branch、day、second|
Artificial timing observation
Flow observation: the flow measuring structures of qiaozidonggou and qiaozixigou runoff stations are triangular wide crested weir and trapezoidal wide crested weir respectively. When there is little water, the flow is measured by the volume method with the connecting tube, and the flow is calculated by the buoy method with the buoy coefficient of 0.85. The flood peak and valley can be observed twice a day. Sediment concentration observation: the method of one point at the water edge is used to take sediment samples, and the sampling times are the same as the current measurement times. Sand samples were treated by displacement method.
According to the regulations of "soil and water conservation test specification" (sd239) and "soil and water conservation test specification" (sl419), the data are observed, sorted and compiled by professional and technical personnel. Observation data shall be measured, calculated, sorted and analyzed in accordance with the requirements of "four follow-up". Errors and unreasonable records of observation shall be handled and corrected in time, and remarks shall be made. In the process of data compilation and input, four levels of manual verification, such as tabulation, primary proofreading, re proofreading and auditing, are carried out in strict accordance with relevant observation and compilation specifications and in accordance with the process of first proofreading, second proofreading, review and review, so as to ensure the quality of data results.
Annual sediment discharge annual runoff total flood volume flood sediment discharge soil loss per unit area runoff coefficient daily average flow daily average sediment concentration daily average suspended sediment transport rate maximum discharge qiaozigou basin
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