| 英文計畫摘要 | In sand-water observation analysis, we executed 8 times field observations (from June, 2021 to September, 2022)in order to measure the water level of Dinglan Bridge and collect the data of discharge and sediment during the high flow stages, include typhoon season, northeast monsoon season and plum rain season(East Asian rainy season). The formula of Dinglan Bridge’s discharge-elevation rating curve is Q=17.3 (H-20.12)3.77; discharge sediment yield rating curve is Qs=16.345Q1.15, is established based on the observation between 2015-2022.
The device of Dinglan Bridge hydrometric stations has been faults, the data recorder and transmission module failure from January 18 to March 15, 2022. Now, the relevant data transmission issues have been resolved, the missing water lever and flow data have been supplemented by the Water Resouce Planning Platform System develop by Water Resources Planning Institute。
Global Navigation Satellite System (GNSS) satellite geodesy is the main approach used in this study. Based on the nationwide GNSS displacement monitoring graph updated annually by Central Weather Bureau (CWB) and the displacement velocity calculated from the GNSS monitoring stations through the island from August, 2021 to July, 2022, there are three monitoring stations around Dingzilan River, which are the historical data from the monitoring stations: PLIN, FIVE and FLON. It is discovered that the site of Dingzilan River tends to to move to the southeast at around 3cm to the east and 1.2cm to the south every year from the change of velocity field and displacement quantities (Figure 10), which has the same tendency with the result calculated from the RTK monitoring data of TTL22 and TTL23.
The terrain variation comparison is between the DSM of current phase and last phase (September, 2018), and the study concentrates on the sites of landslides history in Dingzilan catchment area. In terms of the variation analysis on 10 sites of landslides history, there are no new landslides occurring in Dingzilan catchment area from the orthoimages in current years. In addition, it is found that the vegetation has been mostly restored and goes well in the 10 sites of landslides history from the aerial photos, meanwhile the minor terrain variation quantities indicate to the steady side slopes with no signs of landslides.
The programming language for the displacement monitoring visualization, include HTML, CSS, Bootstrap, jQuery UI and Quasar, are used to establish all components and set up the attributes, and added to the smart management system for Shuangxi Reservoir.
To comply with the competent authority, Water Resources Agency, the system is designed to follow Software Development Life Cycle (SSDLC), information security policies, “Information Security Management Directions for the Executive Yuan and its Subordinate Agencies”, and ISO270001. The security level and protection benchmark are reviewed by the checklist. Every control measure meets the requirement of information security. |