本数据集为1991-2000年黄土高塬沟壑区南小河沟流域花果山水库出口、十八亩台、杨家沟及董庄沟，四个径流站径流泥沙观测数据，径流站的试验观测断面为巴歇尔量水堰、三角槽量水堰，观测方式为人工观测。主要包括南小河沟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": "水位观测：汛期、非汛期基流人工定时观测，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。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。\n泥沙观测 ： 人工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、沙洪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\n
\n\n", "ds_process_way": "（1）流量计算：用观测水位推算流量，十八亩台、花果山水库出口站为巴歇尔堰，计算公式Q=3.7H1.59，杨家沟三角槽量水堰：Q=4.9H2.4，董庄沟三角 槽量水堰：Q=4.8H2.55\nQ:流量，单位：m³/s;H:水位，单位：m;（2）含沙量计算：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": "1991-01-01 00:00:00", "ds_acq_end_time": "2000-12-31 00:00:00", "ds_acq_place": "甘肃省庆阳市西峰区后官寨乡南小河沟流域", "ds_acq_lon_east": 107.50833333333334, "ds_acq_lat_south": 35.68083333333333, "ds_acq_lon_west": 107.62388888888889, "ds_acq_lat_north": 35.74861111111111, "ds_acq_alt_low": 1050.0, "ds_acq_alt_high": 1423.0, "ds_share_type": "apply-access", "ds_total_size": 436224, "ds_files_count": 8, "ds_format": "Excel表格", "ds_space_res": null, "ds_time_res": "分", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "32221e46-bf8e-43c8-8aeb-9e04af5402e9.jpg", "ds_thumb_from": 0, "ds_ref_way": "黄河水利委员会西峰水土保持科学试验站，1991-2000年黄土高塬沟壑区南小河沟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.db0038.2020", "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 19:00:24", "last_updated": "2021-07-08 19:00:24", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.HWXFZhan.2020.78", "i18n": { "en": { "title": "Observation data set of runoff and sediment in Nanxiaohegou watershed in Loess Plateau Gully Region from 1991 to 2000", "ds_format": "", "ds_source": "Water level observation: the base flow in flood season and non flood season is observed at fixed time, and the base flow in non flood season is observed in two sections, that is, once at 8:00 and 20:00; in flood season, base flow is observed in 4-stage system, i.e. 2:00, 8:00, 14:00 and 20:00 respectively, and the flood season is from June to September. In flood period 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, with no less than 3 times near the peak, and no less than 11 times for a single peak. The observation shall be conducted once from 30 min to 1.0 h after leveling, so that the peak, valley and complete water level change process can be measured.\nSediment Observation: the water side one point method is used to collect sediment manually. The principle of sediment sampling times in flood period is to control the change process of sediment concentration. When the flood peaks of water and sand are inconsistent or the sediment concentration changes violently, the measurement times should be increased appropriately. All water samples were treated by displacement method\n
\n", "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 of four runoff stations in Nanxiaohegou watershed of Loess Plateau from 1991 to 2000. The experimental observation sections of runoff stations are Bacher weir and triangular groove weir, and the observation method 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": "Nanxiaohegou watershed, houguanzhai Township, Xifeng District, Qingyang City, Gansu Province", "ds_space_res": "", "ds_projection": "", "ds_process_way": "(1) Discharge calculation: the observed water level is used to calculate the discharge. The outlet stations of shibamutai and Huaguoshan reservoirs are bachuer weir, and the calculation formula is q = 3.7h1.59, Yangjiagou triangular groove weir: q = 4.9h2.4, dongzhuanggou triangular groove weir: q = 4.8h2.55\nQ: Discharge, unit: m3 / S; H: water level, unit: m; (2) calculation of sediment concentration: P = WS / V * 1000, calculation of sediment concentration, P: measured sediment concentration, unit: kg / m3; V: volume of water sample, 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", "径流深", "平均含沙量", "侵蚀模数", "平均流量", "径流模数" ], "ds_subject_tags": [ "水文测量" ], "ds_class_tags": [], "ds_locus_tags": [ "南小河沟流域", "庆阳", "西峰区", "甘肃省" ], "ds_time_tags": [ 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 ], "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" }