In this paper, the instantaneous surface elevation data sample, which is from a recording project in executed in North Sea and has a six day's duration, is analyzed. The corresponding energy spectral density function (target spectrum) was estimated by using the transformation method based on FFT.
In order to reduce the velocity of flow in the beach area and promote sedimentation to raise the elevation of the top of the beach so as to regulate the river regime of the stretch,during 1991 to 1992,an experimental promoting sedimentation works by means of sinking mattress was carried out in this beach.
This paper deals with the characteristics of incoming water and sediment and changes of Tongguan elevation since Sanmenxia Reservoir began its storing clear water and releasing sediment operation mode.
It introduces the process of prototype testing of reducing Tongguan elevation by optimized peach floods occurred in 2006 and points out the following main effect of testing: a) reduced Tongguan elevation by 0.2 m;
It was proven by the stratigraphy of two ice cores from Collins Ice Cap that the summit of Main dome(with elevation of 700m or so) belongs to warm infiltration zone,while that of Small dome(with elevation of 250m or so)to infiltration zone.
The snow covere of the three vertical zones in the Manasi River basin increase with their elevations, while the time when the monthly mean maximum of snow covers appear delays with the increase of elevation in the Manasi River basin.
The paper introduced geoid status in southwest region of Tarim Basin that is low precision in distance difference of geoid and even absent and its effect on precision of oil geophysical prospecting, brought up that in order to transform geodetic height measured from GPS to sea level elevation. It needs to transform geodetic height in GPS 84 coordinate to geodetic height in Beijing 54 coordinate, and then obtain sea level elevation after adding difference of geoid to geodetic height in Beijing coordinate.