Environment and Development of Shallow Sea and Tidal-Lowland.

1.根据阿里亚克海区的资料，对近底水流的湍流扩散特性和海底摩擦特性进行了研究。涡旋的时空宏观尺度随时间变化较大。主流方向的平均值分别为几秒和几十厘米。研究了导致水路的指进现象。考察了颗粒大小分布与底层水平截面上的润湿分数之间的关系。结果表明，当颗粒尺寸在0.150 mm到0.212 mm之间时，水路在底层消失。提出了一种不采用端承桩基础的稳定箱形地基方法(SBF法)，该方法是一种浮动式地基，并对地基的沉降减小对有明软土地基的影响进行了验算，根据两种方法的试验结果，SBF法的沉降量不到平板基础沉降量的一半。裂隙对粘性土蒸发影响的试验表明，裂隙越多，蒸发速率越大。这些实验清楚地表明，水分是从土壤裂缝的内表面蒸发出来的。建立了模拟粘性土水分平衡的数值模型。为了评价计算机视觉系统在不同条件下测量喷雾液滴大小和数量的准确度和精密度，进行了一系列实验。实验结果表明，测量液滴大小的准确度和精密度达到了可接受的水平，并对每个液滴进行了计数，没有任何遗漏

1. An investigation on the characteristics of turbulence diffusion of near-bottom flow, and sea-bottom friction was made on the basis of the data obtained in the interior parts of the Ariake Sea. The temporal and spatial macro-scale of eddies variate largely with time. The mean values of those in the main flow direction are a few seconds and a few ten cm, respectively.2. Fingering causing water pathways is investigated. The relation between particle size distribution and the area of wetted fraction over the horizontal cross-sections of the bottom layer was examined. As a result, it became clear that the water pathways, disappeared in the bottom layer when the particle size between 0.150mm to 0.212mm.3. Instead of the end bearing pile foundation, a stabilized box foundation method(SBF method) which is a kind of floating type foundation was proposed and was also checked regarding the effect of a decrease in the settlement of the foundation on soft Ariake clay.According to the results of the tests on both the SBF, the settlement in the case of SBF was found to be less than a half of the settlement in case of the slab foundation.4. Experiment on the effect of cracking on evaporation from clay soil showed that evaporation rate increased as cracks were formed. It was clear from these experiments that water evaporated from the inner surface of cracks in the soil. Numerical models simulating water balance of clay soil was developed.5. A series of experiments was carried out to appraise accuracy and precision of a computer vision system interfaced with a microscope to measure size and number of sprayed droplets at various conditions. The experiments resulted acceptable levels of accuracy and precision to measure size of droplets and every droplet was counted without any missing