本数据集为1981-1990年砚瓦川流域径流站径流泥沙观测数据集，径流站的试验观测断面为大型抛物线型量水堰，观测方式为人工观测。主要包括砚瓦川流域逐日平均流量数据、逐日平均含沙量数据、逐日平均输沙率数据、洪水水文要素摘录数据、逐次洪水测验成果数据。
", "ds_source": "人工定时观测 。
", "ds_process_way": "人工定时观测，非汛期基流采用2段制，即8时、20时各观测一次；汛期基流采用4段制，即2时、8时、14时、20时各观测一次，汛期时段6～9月。\n（1）水位观测：在抛物线量水堰上部左侧设侧壁式水尺组观测水尺编号、水尺读数。汛期、非汛期基流定时观测，洪水期或者水位变化急剧期，在读取控制起涨、峰顶、落平和其它水位涨落重要转折点水位的前提下，大致按水位变化均匀布设测次，峰顶附近不少于3次，一般单峰不少于11次，落平后30min到1.0h观测一次，要求能测得各次峰、谷和完整的水位变化过程。（2）泥沙观测 ： 采用水边一点法取沙。洪水期取沙次数以能控制住含沙量变化过程为原则，水沙峰不一致或含沙量变化剧烈时，测次需适当增加。水样处理全部采用置换法处理。（3）流量计算：用观测水位推算流量，计算公式为Q=20.89H²，Q:流量，单位：m³/s;H:水位，单位：m。（4）含沙量计算：用公式p=ws/v*1000计算含沙量，p：实测含沙量，单位：kg/m³； v：水样容积，单位：cm³；ws：水样中干沙重，单位：g。
", "ds_quality": "观测数据整编录入过程中经过四级人工校核，分别是制表，初校，复校，审核，以确保数据质量。
", "ds_acq_start_time": "1981-01-01 00:00:00", "ds_acq_end_time": "1990-12-31 00:00:00", "ds_acq_place": "甘肃省庆阳市宁县砚瓦川流域", "ds_acq_lon_east": 107.62555555555555, "ds_acq_lat_south": 35.50472222222222, "ds_acq_lon_west": 107.91666666666667, "ds_acq_lat_north": 35.73722222222222, "ds_acq_alt_low": 980.0, "ds_acq_alt_high": 1340.0, "ds_share_type": "apply-access", "ds_total_size": 3270144, "ds_files_count": 6, "ds_format": "Excel表格", "ds_space_res": null, "ds_time_res": "分", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "119941e3-87b4-4c68-be7c-e8913c19b3b7.png", "ds_thumb_from": 2, "ds_ref_way": "黄河水利委员会西峰水土保持科学试验站，1981-1990年黄土高塬沟壑区砚瓦川流域径流泥沙观测数据集，国家冰川冻土沙漠科学数据中心(www.ncdc.ac.cn)，2020，doi：10.12072/ncdc.HWXFZhan.db0006.2020", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "8f345532-a01e-49ca-a880-641bc176ede9", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": null, "quality_level": 3, "publish_time": "2021-07-08 19:15:23", "last_updated": "2021-07-08 19:15:23", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.HWXFZhan.2020.75", "i18n": { "en": { "title": "Observation data set of runoff and sediment in yanwachuan basin in Loess Plateau Gully Region from 1981 to 1990", "ds_format": "", "ds_source": "Artificial timing observation.
", "ds_quality": "In the process of compilation and input of observation data, there are four levels of manual verification, including tabulation, primary calibration, recheck and audit, so as to ensure the data quality.
", "ds_ref_way": "", "ds_abstract": "This data set is the runoff and sediment observation data set of yanwachuan River Basin from 1981 to 1990. The experimental observation section of runoff station is a large parabolic weir, and the observation mode is manual observation. It mainly includes daily average discharge data, daily average sediment concentration data, daily average sediment transport rate data, extracted data of flood hydrological elements, and successive flood test results data.
", "ds_time_res": "分", "ds_acq_place": "Yanwachuan basin, Ningxian County, Qingyang City, Gansu Province", "ds_space_res": "", "ds_projection": "", "ds_process_way": "Manual regular observation: the base flow in non flood season adopts two-stage system, that is, once at 8:00 and 20:00; in flood season, it adopts 4-stage system, that is, once at 2:00, 8:00, 14:00 and 20:00, and the flood season is from June to September.\n(1) Water level observation: a side wall type water gauge group is set on the left side of the upper part of the parabolic weir to observe the number and reading of the water gauge. Regular observation of base flow in flood season and non flood season. In flood season or rapid water level change period, under the premise of reading and controlling the water level at the important turning points of rise and fall, peak top, fall level and other water level fluctuation, the measurement times are roughly evenly arranged according to the water level change. There are no less than 3 times near the peak, and no less than 11 times for a single peak. The observation is conducted 30 minutes to 1.0 hours after leveling, and each peak, valley and integrity are required to be measured The water level change process. (2) Sediment Observation: the method of one point at the water edge is used to collect sediment. The principle of sediment sampling times in flood period is to control the change process of sediment concentration. When the water and sediment peaks are inconsistent or the sediment concentration changes sharply, the measurement times should be increased appropriately. All water samples were treated by displacement method. (3) Discharge calculation: the observed water level is used to calculate the discharge, and the calculation formula is q = 20.89h? 2, Q: flow, unit: m3 / S; H: water level, unit: M. (4) Calculation of sediment concentration: use the formula P = WS / V * 1000 to calculate the sediment concentration, P: measured sediment concentration, unit: kg / m3; V: water sample volume, unit: cm 3; WS: dry sand weight in water sample, unit: G.
", "ds_ref_instruction": " " } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "平均输沙率", "侵蚀模数", "径流模数", "径流深", "平均流量", "平均含沙量" ], "ds_subject_tags": [ "水文测量" ], "ds_class_tags": [], "ds_locus_tags": [ "庆阳市", "宁县", "砚瓦川", "甘肃省" ], "ds_time_tags": [ 1976, 1977, 1978, 1979, 1980 ], "ds_contributors": [ { "true_name": "黄河水利委员会西峰水土保持科学试验站", "email": "18526328@qq.com", "work_for": "黄河水利委员会西峰水土保持科学试验站", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "袁静", "email": "317806317@qq.com", "work_for": "黄河水利委员会西峰水土保持科学试验站", "country": "中国" } ], "ds_managers": [ { "true_name": "袁静", "email": "317806317@qq.com", "work_for": "黄河水利委员会西峰水土保持科学试验站", "country": "中国" } ], "category": "水土保持" }