The solidity dykes is the basic guarantee . with the heightening of the dykes of the yellow river every year , it became higher and steeper . there are many rills and puddles on the dyke slopes 由于黄河大堤逐年加高，大堤形成了高且陡的土坡，每逢暴雨后，在黄河大堤堤坡和戗坡区常有条条水沟以及戗台区的、水穴(浪窝) 。
2.
Based on the analysis of the data and information from the field observations and lab experiments , the results were as follows : ( 1 ) the results of the simulated rainfall and runoff erosion experiments in lab . under the design experiment conditions including the constant rainfall intensities of 1 . 0 , 2 . 0 , 3 . 0mm / min and the rainfall durations of 30 , 70 minutes and with soil moisture content 9 . 5 % or 10 . 0 % for dry situation , as well as with the soil moisture content 19 . 0 % or 20 . 0 % for wet situation , the soil erosion increased nonlinearly with the rainfall intensity , and the rainfall duration . the results of the experiments indicated that the amount of soil erosion caused by the simulated rainfall and runoff on the dry - soil slope was more than that on the wet - soil slope 通过实地观测及室内试验资料分析，得到如下研究成果： 1 、室内模拟降雨径流对戗坡的侵蚀试验研究结果在定雨强为1 . 0 、 2 . 0 、 3 . 0mm min ，降雨历时30 、 70分钟，干土含水量为9 . 5 10 . 0 ，湿土含水量为19 . 0 20 . 0的条件下，侵蚀量与雨强成非线性正比关系；雨强大，侵蚀量大；降雨历时长，侵蚀量也大；堤坡含水量大时，侵蚀量小，堤坡含水量小时侵蚀量大。
3.
After the systemic comparison of the two methods , the detail applicable conditions have been suggested . by the physical model tests and various methods , the frequent spectrum and the directional spectrum of incident waves and reflected waves of slope breakwater have been investigated systemically , and the bulk reflection coefficients , the directional spreading of reflection coefficients and the frequent spect 通过物理模型试验，系统地研究了斜坡堤前入、反射波方向谱的分离计算，采用mtpm分析得到了单向(包括斜向)不规则波的总体反射系数和反射系数频率谱(随堤坡变化)以及由iribarren数表示的包含堤坡影响的反射系数频率谱。
