The area is close to the mountains and the MOAst, with overlapping mountains, few plains, short and rapid rivers, weak and limited water sources, with up to 300 irrigation canals carved into mountains and valleys, as well as more than 1,190 small ditches that run across fields. Irrigation areas are scattered on both sides of mountain streams and valleys in the terraced fields and the area is vast. Travel is inconvenient, mainly on foot which makes the area extremely difficult to manage. On January 1, 1975, two Keelung Management Officess were merged into the "Taiwan Province Northern Taiwan and Keelung Management Offices" and later renamed "Peikee Management Office" on October 1st, 2020.
The office has jurisdiction over as many as 300 diverting irrigation canals and 1,190 small ditches, mainly diverting water from Guizikeng River, Waiganzhenlin River, Zhuangzinei River, Xiaguiroushan River, Xinghuadian River, Gongsitian River, Houzhouzi River, Huiyaozi River, Datun River, Balian River, Dakeng River, Bajia River, Fenglin River, Laomei River, Shimen River, Alibang River, Huang River, Qingshui River, Daozhaohu River, Shichuizi River, Jinbaoli River, Yuantanzi River, Lujueping River, Keelung River, Dahu River, Shuang River, Yuanwangkeng River, Fangjiao River, Shibikeng River, Dingzilankeng River, Pinglin River, Mudankeng River, Longlong River and Shiding River. In addition, some spring water is diverted for irrigation purposes, mountain water is taken from valley streams, and there are eight deep underground wells dug outside ponds distributed throughout the area to provide supplementary irrigation.
This irrigation area is used for double cropped fields and single cropped fields. While the office has jurisdiction over 300 canals and is divided into eight service areas, with four workstations in the irrigation area. Administrators in each management office often patrol and manage the water delivery and the various irrigation facilities of each canal, performing regular maintenance to ensure they are in good order. Irrigation plans are formulated for each rice cultivation season and these guide water delivery and distribution operations. As for field water distribution management, this is undertaken by grass-roots organizations engaged in field irrigation and water distribution. Irrigation team leaders or group leaders and member farmers take water for irrigation in a predetermined order to ensure irrigation proceeds smoothly, maintaining production and protecting farmers' ability to make a living. During dry periods or droughts, alternate irrigation or non-normal irrigation is implemented to enhance water distribution.