32 results about "Sea level rise" patented technology

The invention discloses a method for detecting glacial ablation based on the tracer technique, and the method comprises the following steps: 1, adding different tracer agents with the equal concentration to a plurality of parts of water, uniformly mixing the tracer agents and water, recording the size and weight of each glacier model at the same time, sequentially freezing the plurality of parts of water with the tracer agents from the inside to the outside in a layered manner, and building a plurality of glacier models; 2, adjusting the environment factors of the surroundings of the glacier models, collecting the thawed water samples of the glacier models under different environment factors, and measuring the concentrations of all tracer agents in the water samples; 3, obtaining the weight, thawing speed and thawing position of the water samples of the glacier models at different layers under different conditions according to the contents of the tracer agents, and deducing the physical process of actual glacial ablation according to the thawing speed, the thawing weight and the thawing position. According to the invention, the method achieves the purpose of simulating the glacial ablation process through the glacier models and further deducing the ablation speed of an actual glacier, so as to carry out the early warning and analysis of the sea level rise and glacier natural hazards.

The invention provides a sea level rise-based land risk assessment method and a device and relates to the technical field of the marine environment forecasting technology. The sea level rise-based land risk assessment method comprises the steps of obtaining an evaluation region; according to the coastal defense capability corresponding to the evaluation region and the ground elevation data of the evaluation region, determining the involved area in the evaluation region in each preset sea level rising situation; according to a land-use type corresponding to each land grid in the involved area, determining a corresponding risk coefficient for each land grid; according to the risk coefficient corresponding to each land grid and the involved area of the land grid, determining the sea level rising risk level for each land grid. According to the technical scheme of the sea level rise-based land risk assessment method and the device, the technical problems in the prior art that, existing assessment methods are not high in practicality and difficult to meet the requirements of development programs and engineering designs in coastal cities, can be solved.

The invention relates to a sandbeach-staying-waiting construction method of a cutter suction dredger. The sandbeach-staying-waiting construction method is characterized by including the steps that a dredger pit area without hard foreign matter is selected, and the cutter suction dredger is sailed to a soil taking area to excavate a dredger pit when the sea level meets the drafting condition; when the water depth can not meet the drafting condition, the cutter suction dredger stays on a sandbeach and is stranded to wait till the sea level rises again; after the water depth meets the requirement and the cutter suction dredger floats, excavation of the dredger pit is conducted again till the dredger pit with the depth and the area meeting requirements is excavated. Compared with the prior art, the sandbeach-staying-waiting construction method has the advantages that the time spent on entering and exiting of the dredger and pipe disassembling is saved, excavation of the dredger pit can be completed only through two days and four tides, construction efficiency is greatly improved compared with a conventional construction method, the structure of the dredger is not influenced by sandbeach staying waiting construction, and economic benefits are quite remarkable.

The invention belongs to the field of sea level evaluation and especially relates to a device and method for evaluating sea level rise based on hydrodynamic force. For the problem that an existing evaluation device for sea level rise based on hydrodynamic force has low practicability and the evaluation from different tide level, flow rate and flow direction conditions is difficult, the invention proposes a following scheme, the device of the invention comprises a plurality of monitoring floating boxes, moving plates are installed in the multiple monitoring floating boxes in a sliding mode, controllers are fixedly installed at the bottoms of the multiple moving plates and are connected through a network, fixed holes are formed in inner walls of tops of the monitoring floating boxes, movingcolumns are slidably installed in the fixed holes, top ends of the moving columns are fixedly installed on the surfaces of the moving plates, and rotating grooves are formed in the bottoms of the moving columns. The evaluation device of the invention has the advantages of reasonable structure, convenient operation and high practicability, the multiple monitoring floating boxes can collect data from different tide levels, flow rates and flow directions, and the evaluation result is accurate.