本数据集为1981-1990年南小河沟流域杨家沟、董庄沟及十八亩台3个蒸发量观测点的逐日水面蒸发量。观测仪器型号为HY.AM3小型蒸发皿，口径20cm，观测精度0.1mm。每日8时观测一次，封冻期间每五日观测一次，蒸发皿的蒸发量用同规格雨量杯或专用台秤观测。
", "ds_source": "仪器连续观测人工定时观测
", "ds_process_way": "1）如果算出蒸发量为负值，则一律记为“0.0+”。\n2）因在规定的观测时间内蒸发皿结冰，而改在不结冰的时间进行观测之日，应在蒸发量数值右侧加“B”符号。\n3）结冰期内，如果几天观测一次蒸发总量，则应将总量填记在观测之日的格内，在停止观测各日的格内填记“↓B”符号。但跨月者，应按日数的比例，算出分配到前月的蒸发量，记到该月末日格内，再以蒸发总量减前月的蒸发量，算出分配到后月的蒸发量，记到观测之日格内，两个数值均加分列符号“Φ”，其余各日均填“↓B”符号。\n4）观测资料缺测时可进行插补，但插补的时间在一旬内不得超过3天。\n5）非结冰期间，因故缺测时，如果其后开始观测日的观测值内包括全部缺测日的蒸发量，不加结冰符号。\n6）一月内有合并、分列数值者，仍当作资料齐全，月蒸发量不加括号。\n7）一月内有合并数值者，以每一合并期间的总量除以相应总日数，算出该时段的平均每日蒸发量，参加月最大、最小的挑选。如当选为最大、最小时，应加括号；如果不是这种平均值而是其他数值当选为最大、最小时，一般也应加括号；只有能判定其确为月最大、最小时，才不加括号。\n8）去冬今春的初冰、终冰日期栏填记从前一年7月1日至今年6月30日的期间里蒸发皿内第一次和最后一次结冰的日期。今冬初冰日期栏填记从今年7月1日至年末的期间里蒸发皿内第一次结冰的日期。
", "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": 11680719, "ds_files_count": 8, "ds_format": "Excel表格", "ds_space_res": null, "ds_time_res": "分", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": null, "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年黄土高塬沟壑区南小河沟流域气象观测数据集，国家冰川冻土沙漠科学数据中心(www.ncdc.ac.cn)，2020，doi：10.12072/ncdc.HWXFZhan.db0009.2020", "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 19:06:18", "last_updated": "2021-07-08 19:06:18", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.HWXFZhan.2020.71", "i18n": { "en": { "title": "Precipitation observation data set of Nanxiaohegou watershed in the gully area of the Loess Plateau from 1981 to 1990", "ds_format": "", "ds_source": "Instrument continuous observation\nManual timing observation
", "ds_quality": "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.
", "ds_ref_way": "", "ds_abstract": "This data set is the daily water surface evaporation of Yangjiagou, dongzhuanggou and 18 Mu stations in Nanxiaohegou basin from 1981 to 1990. The model of observation instrument is HY.AM3 The diameter of the dish is 20cm, and the observation accuracy is 0.1mm. Observe at 8:00 a.m. every day, and observe once every five days during the freezing period. The evaporation capacity of the evaporating dish is observed with the same specification rainfall cup or special platform scale..
", "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) If the calculated evaporation is negative, it will be recorded as \"0.0 +\".\n2) Since the evaporating dish freezes in the specified observation time, and the observation is carried out at a non icing time, a \"B\" symbol should be added to the right side of the evaporation value.\n3) During the icing period, if the total amount of evaporation is observed once a few days, the total amount should be recorded in the grid of the observation day, and the symbol \"↓ B\" should be filled in the grid of each day when the observation is stopped. However, for those who cross the month, the evaporation allocated to the previous month should be calculated according to the proportion of the number of days, and recorded in the doomsday grid of the month. Then, the total evaporation amount minus the evaporation amount of the previous month is used to calculate the evaporation allocated to the next month. When it is recorded in the observation day grid, the two values are added with the column symbol \"Φ\", and the rest days are filled with \"↓ B\".\n4) If the observation data is missing, interpolation can be carried out, but the time of interpolation shall not exceed 3 days within 10 days.\n5) During the non icing period, if the evaporation of all the missing days is included in the observation value of the subsequent observation day, no icing sign is added.\n6) If there are combined and broken down values in a month, they are still regarded as complete data, and monthly evaporation is not bracketed.\n7) If there is a combined value in a month, the average daily evaporation of the period is calculated by dividing the total amount of each merger period by the corresponding total number of days, and the selection of the maximum and minimum of each month is taken. If it is selected as the maximum and minimum, brackets shall be added; if other values are selected as the maximum and minimum instead of the average value, brackets shall be added generally; only if it can be determined that they are the maximum and minimum of a month, they shall not be bracketed.\n8) The dates of the first and last ice in the evaporating dish during the period from July 1 of the previous year to June 30 of this year are recorded in the columns of the first and last ice formation in the pan. The date of the first freezing in the pan from July 1 to the end of this year is recorded in the ice date column at the beginning of this winter.
", "ds_ref_instruction": " " } }, "submit_center_id": "ncdc", "data_level": 0, "recommendation_value": 0, "license_type": "https://creativecommons.org/licenses/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, "belong_to_nieer": false, "ds_topic_tags": [ "降水量", "最大降水量", "时段降水量", "降水摘录" ], "ds_subject_tags": [ "水文化学" ], "ds_class_tags": [], "ds_locus_tags": [ "庆阳", "西峰", "南小河沟", "甘肃省" ], "ds_time_tags": [ 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990 ], "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" }