固定森林样地位于甘肃省水源涵养林研究院所水文观测试验场所在的祁连山大野口排露沟流域。\n
\n样地测树分别于2003年7月至8月和2007年7月至8月，由甘肃省水源涵养林研究院和中国科学院寒区旱区环境与工程研究所技术人员测量完成，共观测了17块固定森林样地，调查内容包括样地因子调查和每木测量调查。样地观测因子主要有所属林场，样地中心点经纬度坐标、坡向、坡位、坡度、土壤厚度、乔层郁闭度、叶面积指数等。测量所用仪器主要为皮尺、胸径尺、花杆、测树仪、罗盘仪和鱼眼相机。每木测量因子包括胸径、树高、枝下高、横坡方向冠幅宽、顺坡方向冠幅宽、单木生长状况等。\n
\n详细信息参考“黑河综合遥感联合试验：排露沟流域和大野口流域加密观测区固定样地测树调查数据集（2003年）”和“黑河综合遥感联合试验：排露沟流域和大野口流域加密观测区固定样地测树调查数据集（2007年）”两条元数据。\n
\n本数据集中的LAI为2008年黑河综合遥感联合试验开展期间的补充测量数据。即在这些固定样地做了LAI的补测。LAI补充观测时间自2008年6月1日至13日，共调查了这17块固定样地中的15块。对每块样地采用了四种仪器进行观测。这些仪器除了商业仪器HemiView鱼眼相机、LAI-2000和TRAC外，还采用了北京师范大学自制的冠层分析仪器。在每一块20m×20m样地内，TRAC沿着与阳光入射方向垂直的方向进行两条平行路线测量，这两条路线的测量基本能代表整个样方；HemiView鱼眼相机和LAI-2000测量相同的点，即在TRAC线上各取三个点，再加上样方中心点，共7个测量点。\n
\n本套数据集可为森林结构参数遥感反演方法研究提供地面实测数据。
", "ds_source": "共观测了17块固定森林样地，调查内容包括样地因子调查和每木测量调查。样地观测因子主要有所属林场，样地中心点经纬度坐标、坡向、坡位、坡度、土壤厚度、乔层郁闭度、叶面积指数等。测量所用仪器主要为皮尺、胸径尺、花杆、测树仪、罗盘仪和鱼眼相机。每木测量因子包括胸径、树高、枝下高、横坡方向冠幅宽、顺坡方向冠幅宽、单木生长状况等。
", "ds_process_way": "LAI补充观测时间自2008年6月1日至13日，共调查了这17块固定样地中的15块。对每块样地采用了四种仪器进行观测。这些仪器除了商业仪器HemiView鱼眼相机、LAI-2000和TRAC外，还采用了北京师范大学自制的冠层分析仪器。
\n在每一块20m×20m样地内，TRAC沿着与阳光入射方向垂直的方向进行两条平行路线测量，这两条路线的测量基本能代表整个样方；HemiView鱼眼相机和LAI-2000测量相同的点，即在TRAC线上各取三个点，再加上样方中心点，共7个测量点。
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "2003-07-12 00:00:00", "ds_acq_end_time": "2007-09-11 00:00:00", "ds_acq_place": "黑河流域,大野口流域加密观测区,森林水文试验区,排露沟流域加密观测区", "ds_acq_lon_east": 100.2875, "ds_acq_lat_south": 38.46666666666667, "ds_acq_lon_west": 100.30333333333333, "ds_acq_lat_north": 32.666666666666664, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 236961580, "ds_files_count": 2, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "分、日、次", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "14d684fc-9b14-4835-9a9d-3f99d5cd9b90.png", "ds_thumb_from": 0, "ds_ref_way": "陈尔学, 宋金玲, 何祺胜，黑河综合遥感联合试验：排露沟流域和大野口流域加密观测区固定森林样地调查数据集（2003年-2007年），国家冰川冻土沙漠科学数据中心(www.ncdc.ac.cn)，2019，doi：10.12072/ncdc.NIEER.db1899.2022", "paper_ref_way": "", "ds_ref_instruction": "本数据由“黑河综合遥感联合试验”产生，用户在使用数据时请在正文中明确声明数据的来源，并在参考文献部分引用本元数据提供的引用方式。", "ds_from_station": null, "organization_id": "14df1d8b-6362-4c0f-b88e-b46d4abe5db9", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596 ", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "10.12072/ncdc.NIEER.db1899.2022", "subject_codes": null, "quality_level": 3, "publish_time": "2022-03-15 18:16:13", "last_updated": "2022-03-15 18:16:13", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.NIEER.2021.1899", "i18n": { "en": { "title": "Heihe River Integrated Remote Sensing joint experiment: survey data set of fixed forest sample plots in dense observation area of Pailugou basin and Dayekou basin (2003-2007)", "ds_format": "", "ds_source": "A total of 17 fixed forest sample plots were observed, including sample plot factor survey and per tree survey. The observation factors of the sample plot mainly include the forest farm, the longitude and latitude coordinates of the central point of the sample plot, slope direction, slope position, slope, soil thickness, tree canopy density, leaf area index, etc. The instruments used for measurement mainly include tape measure, DBH ruler, flower pole, tree measuring instrument, compass and fish eye camera. The measurement factors of each tree include DBH, tree height, height under branches, crown width in cross slope direction, crown width along slope direction, growth status of single tree, etc", "ds_quality": "
Good data quality
", "ds_ref_way": "", "ds_abstract": "The fixed forest sample plot is located in the drainage ditch basin of Dayekou, Qilian Mountain, where the hydrological observation test site of Gansu Water Conservation Forest Research Institute is located.\n
\nFrom July to August 2003 and from July to August 2007, the sample plots were measured by technicians of Gansu Water Conservation Forest Research Institute and Institute of cold and arid areas environment and engineering, Chinese Academy of Sciences. A total of 17 fixed forest samples were observed, including sample plot factor investigation and per tree measurement investigation. The observation factors of the sample plot mainly include the forest farm, the longitude and latitude coordinates of the central point of the sample plot, slope direction, slope position, slope, soil thickness, tree canopy density, leaf area index, etc. The instruments used for measurement mainly include tape measure, DBH ruler, flower pole, tree measuring instrument, compass and fish eye camera. The measurement factors of each tree include DBH, tree height, height under branches, crown width in cross slope direction, crown width along slope direction, growth status of single tree, etc.\n
\nFor details, please refer to the metadata of \"Heihe River comprehensive remote sensing joint test: fixed sample geodetic tree survey data set of dense observation area in tailugou basin and Dayekou basin (2003)\" and \"Heihe River comprehensive remote sensing joint test: fixed sample geodetic tree survey data set of dense observation area in tailugou basin and Dayekou basin (2007)\".\n
\nLai in this data set is the supplementary measurement data during the joint experiment of Heihe comprehensive remote sensing in 2008. That is, supplementary measurement of Lai was made in these fixed sample plots. Lai supplementary observation time was from June 1 to 13, 2008, and 15 of the 17 fixed sample plots were investigated. Four instruments were used to observe each sample plot. In addition to commercial instruments hemiview fisheye camera, LAI-2000 and trac, these instruments also use the canopy analysis instrument made by Beijing Normal University. 20m in each block × In the 20m sample plot, trac carries out two parallel route measurements along the direction perpendicular to the incident direction of sunlight, and the measurements of these two routes can basically represent the whole quadrat; Hemiview fisheye camera and LAI-2000 measure the same points, that is, take three points on the trac line respectively, plus the quadrat center point, a total of 7 measurement points.\n
\nThis data set can provide ground measured data for the study of remote sensing inversion method of forest structural parameters
", "ds_time_res": "分、日、次", "ds_acq_place": "Heihe River Basin, Dayekou River Basin intensive observation area, forest hydrology test area and Pailugou River Basin intensive observation area", "ds_space_res": "", "ds_projection": "", "ds_process_way": "Lai supplementary observation time was from June 1 to 13, 2008, and 15 of the 17 fixed sample plots were investigated. Four instruments were used to observe each sample plot. In addition to commercial instruments hemiview fisheye camera, LAI-2000 and trac, these instruments also use the canopy analysis instrument made by Beijing Normal University\n
20m in each block × In the 20m sample plot, trac carries out two parallel route measurements along the direction perpendicular to the incident direction of sunlight, and the measurements of these two routes can basically represent the whole quadrat; Hemiview fisheye camera and LAI-2000 measure the same points, that is, take three points on the trac line respectively, plus the quadrat center point, a total of 7 measurement points", "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": [ "植被", "生物量", "森林" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域", "大野口流域加密观测区", "森林水文试验区" ], "ds_time_tags": [ 2003, 2007 ], "ds_contributors": [ { "true_name": "陈尔学", "email": "chenerx@caf.ac.cn", "work_for": "中国林业科学院资源信息研究所", "country": "中国" }, { "true_name": "宋金玲", "email": "songjl@bnu.edu.cn", "work_for": " 北京师范大学", "country": "中国" }, { "true_name": "何祺胜", "email": "hqsfei999@163.com", "work_for": "中国科学院遥感应用研究所", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "陈尔学", "email": "chenerx@caf.ac.cn", "work_for": "中国林业科学院资源信息研究所", "country": "中国" } ], "ds_managers": [ { "true_name": "陈尔学", "email": "chenerx@caf.ac.cn", "work_for": "中国林业科学院资源信息研究所", "country": "中国" } ], "category": "生态" }