数据概况：张掖的渠道分为干、支、斗、农、毛五级渠道，其中农渠一般没有衬砌，毛渠为田间工程，所以主要采集了干、支、斗三级渠道和小部分的农渠。灌溉渠系数据包括总干渠（涉及多个灌区）2条，总干渠（单个灌区内）和干渠157条、支渠782条、斗渠5315条，总长度8, 745.0km。
\n\n数据内容说明：属性表的字段包括编码、区县名、灌区名、渠道全程、渠道名、渠道类型、位置、总长度、已衬砌、设计流量、设计农田、设计林草、实灌农田、实灌林草、水权面积、备注。编码示例：G06G02Z15D01，其中前第1个字母代表县区名，第2和3个数字代表某县（区）编号，第4-6个字符代表干渠代码，第7-9个字符代表支渠代码，第10-12个字符代表斗渠代码。
", "ds_source": "灌溉渠系数据采集采用遥感判读和GPS实地测量相结合的方法。GPS直接采集渠道是最为有效的方法，但GPS采集渠道工作量太大，我们只在部分灌区验证测量。主要采取的方式是首先收集各水管所手工绘制的灌区示意图，这些示意图大部分没有定位，只有大满、上三等个别灌区基于地形图进行了定位，高台县部分灌区利用GPS对部分渠道进行了定位。参考灌区示意图，基于Quikbird、ASTER、TM遥感影像和1:5万的地形图进行渠道空间定位。对于干渠和支渠，由于在遥感影像上线性特征明显，地形图上一般也有标示，所以可以较为准确的定位。对于斗渠，有高分辨率影像的区域，可以较为准确的定位，其它区域则只能根据模糊的影像线性特征和灌区工作人员的提示信息进行粗略定位，定位精度较低。各水管所同时提供了渠道属性数据，与空间数据进行一一对应。。
", "ds_process_way": "采取的方式是首先收集各水管所手工绘制的灌区示意图，这些示意图大部分没有定位，只有大满、上三等个别灌区基于地形图进行了定位，高台县部分灌区利用GPS对部分渠道进行了定位。参考灌区示意图，基于Quikbird、ASTER、TM遥感影像和1:5万的地形图进行渠道空间定位。
", "ds_quality": "渠道分布图初稿完成后，先后两次提交给各水管所熟悉渠道分布的人员进行校正，第一次主要是剔重补漏，第二次主要校正位置和完善属性数据
", "ds_acq_start_time": "2006-01-01 00:00:00", "ds_acq_end_time": "2006-12-31 00:00:00", "ds_acq_place": "黑河流域张掖市", "ds_acq_lon_east": 101.41638888888889, "ds_acq_lat_south": 38.11666666666667, "ds_acq_lon_west": 99.13305555555554, "ds_acq_lat_north": 39.766666666666666, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 7897862, "ds_files_count": 2, "ds_format": "矢量", "ds_space_res": null, "ds_time_res": "", "ds_coordinate": "WGS84", "ds_projection": "+proj=longlat +datum=WGS84 +no_defs", "ds_thumbnail": "7541e059-c641-4c64-b5ba-f0ec2cdecccb.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "本数据的版权归张掖市水务局和中国科学院寒区旱区环境与工程研究所所有，用户在使用数据时请在正文中明确声明数据的来源。", "ds_from_station": null, "organization_id": "9c4867b1-5cb1-4de0-abeb-df42547bf41e", "ds_serv_man": "李红星", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.4520" ], "quality_level": 3, "publish_time": "2021-01-08 11:10:11", "last_updated": "2023-09-04 10:25:10", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Westdc.2020.385", "i18n": { "en": { "title": "Irrigation ditch map in Zhangye city", "ds_format": "Shapefile", "ds_source": "The data acquisition of irrigation canal system is based on the combination of remote sensing interpretation and GPS field measurement. GPS direct acquisition channel is the most effective method, but the workload of GPS acquisition channel is too large, so we only verify the measurement in some irrigation areas. The main way is to collect the manually drawn irrigation map of each water pipe station. Most of these maps are not located. Only some irrigation areas such as Daman and shangsan are located based on the topographic map. Some irrigation areas in Gaotai County use GPS to locate some channels. Referring to the schematic diagram of irrigation area, the spatial positioning of channel is carried out based on quikbird, aster, TM remote sensing images and 1:50000 topographic map. For the main canal and branch canal, because of the obvious linear characteristics in the remote sensing image, the topographic map is also marked, so it can be more accurate positioning. For douqu, the area with high-resolution image can be located more accurately, while other areas can only be roughly located according to the fuzzy linear characteristics of the image and the prompt information of the irrigation staff, with low positioning accuracy. At the same time, each water pipe station provides channel attribute data, which corresponds to the spatial data one by one..
", "ds_quality": "After the completion of the first draft of the channel distribution map, it was submitted twice to personnel familiar with the channel distribution of each water pipe for correction. The first time was mainly to eliminate duplicates and fill in gaps, and the second time was mainly to correct the location and improve attribute data
", "ds_ref_way": "", "ds_abstract": "Data overview: Zhangye's canals are divided into five levels: trunk, branch, Dou, Nong and Mao. Generally, the agricultural canals are not lined, and the maoqu is a field project. Therefore, the three levels of trunk, branch and Dou and a small part of the agricultural canals are mainly collected. The irrigation canal system data includes two main canals (involving multiple irrigation districts), 157 main canals (within a single irrigation district), 782 branch canals, 5315 doucanals, with a total length of 8, 745.0km.
\nData acquisition process: the irrigation canal system data acquisition adopts the method of combining remote sensing interpretation and GPS field measurement. GPS direct acquisition channel is the most effective method, but the workload of GPS acquisition channel is too large, we only verify the survey in some irrigation areas. The main way is to first collect the irrigation area schematic maps drawn manually by each water pipe, most of which are not located, only the individual irrigation areas such as Daman and shangsan are located based on the topographic map, and some irrigation areas in Gaotai County use GPS to locate some channels. Referring to the irrigation area schematic diagram, the channel spatial positioning is based on quikbird, aster, TM remote sensing image and 1:50000 topographic map. For the main and branch canals, because of the obvious linear characteristics on the remote sensing image and the general signs on the topographic map, it can be more accurate positioning. For the douqu, the area with high-resolution image can be located more accurately, while the other areas can only be roughly located according to the fuzzy linear characteristics of the image and the prompt information of the irrigation area staff, with low positioning accuracy. At the same time, each water pipe station provides channel attribute data, which corresponds to the spatial data one by one. After the first draft of the channel distribution map is completed, it is submitted to the personnel familiar with the channel distribution of each water pipe for correction twice, the first time is mainly to remove the weight and make up the leakage, the second time is mainly to correct the location and improve the attribute data.
\nData content description: the fields in the attribute table include code, name of district and county, name of irrigation area, channel whole process, channel name, channel type, location, total length, lined, design flow, design farmland, design forest and grass, actual irrigation farmland, actual irrigation forest and grass, water right area and remarks. Code example: g06g02z15d01, in which the first letter represents the county name, the second and third numbers represent a county (District) number, the fourth to sixth characters represent the main channel code, the seventh to ninth characters represent the branch channel code, and the tenth to twelfth characters represent the douqu code.
", "ds_time_res": "", "ds_acq_place": "Zhangye City in Heihe River Basin", "ds_space_res": "", "ds_projection": "+proj=longlat +datum=WGS84 +no_defs", "ds_process_way": "The way to take is to first collect the irrigation area schematic maps drawn manually by each water pipe, most of which are not located, only the individual irrigation areas such as Daman and shangsan are located based on the topographic map, and some irrigation areas in Gaotai County use GPS to locate some channels. Referring to the irrigation area schematic diagram, the channel spatial positioning is based on quikbird, aster, TM remote sensing image and 1:50000 topographic map.
", "ds_ref_instruction": "The copyright of this data belongs to Zhangye Water Bureau and Institute of environment and Engineering in cold and dry areas of Chinese Academy of Sciences. When using the data, users should clearly state the source of the data in the text." } }, "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": [ "编码、区县名、渠道全程，渠道名，渠道类型，位置，总长度，已衬砌，设计流量，设计农田，设计林草，实灌农田，实灌林草水，权面积" ], "ds_subject_tags": [ "人文地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "临泽县", "甘州区", "民乐县", "高台县", "山丹县", "黑河流域", "张掖市" ], "ds_time_tags": [ 2006 ], "ds_contributors": [ { "true_name": "马明国", "email": "mmg@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "马明国", "email": "mmg@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "ds_managers": [ { "true_name": "马明国", "email": "mmg@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "category": "生态" }