鲁南沙质海岸的侵蚀量及其影响因素

来源 :海洋地质与第四纪地质 | 被引量 : 0次 | 上传用户:huacheng5215
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
近数十年来 ,鲁南海岸持续侵蚀 ,与 2 0世纪 6 0年代相比 ,该段岸线平均蚀退率 1m /a左右 ,海滩沙侵蚀量约 2 0 .79× 10 4m3/a。其中 ,近 2 8年陆源输沙平均减少 6 .47× 10 4m3/a,人为前滨采沙 8.9× 10 4m3/a,海平面上升引起海滩侵蚀量约为 1.6 7× 10 4m3/a,该三因素影响力度之比为 4∶ 5∶ 1 In recent decades, the coast of Lunan continued to erode. Compared with the 1960s, the coastline average erosion rate was about 1m / a. Beach sand erosion was about 20.79 × 10 4m 3 / a. Among them, in the past 28 years, the average amount of sediment transport by land-source transport decreased by 6. 47 × 10 4 m 3 / a and that of man-made foreshore was 8.9 × 10 4 m 3 / a. The beach erosion caused by sea level rise was about 1.6 7 × 10 4 m 3 / a Three factors affect the ratio of 4: 5: 1
其他文献
AFLP(扩增片段长度多态性)是一种新的DNA分子标记技术,具有高效、快捷、稳定、可靠的特点。柿是原产我国的重要果树树种,在长期的引种和栽培过程中, 同名异物和同物异名现象严重,品
陈元方年十一时,候袁公。袁公问曰:“贤家君①在太丘,远近称之,何所履行②?”元方曰:“老父在太丘,强者绥③之以德,弱者抚之以仁,恣其所安,久而益敬。”袁公曰:“孤往者尝为邺令,正行此事。不知卿家君法④孤,孤法卿父?”元方曰:“周公、孔子,异世而出,周旋动静,万里如一。周公不师孔子,孔子亦不师周公。”  (选自《世说新语笺疏》,余嘉锡撰,中华书局1983年版)  【注释】  ①贤家君:对陈元方父亲的
期刊
Considering some simple topological properties of vorticity vector,the frozen-in property of vorticity herein is revisited.A vortex line,as is analogous to velo
技法指点rn记叙文记事,不能仅仅满足于把生活中发生的事情真实还原、记叙清楚,还要能准确捕捉生活细节,写出扣人心弦、感人至深的故事,从而达到刻画人物、揭示事理、表达中心
期刊
本文以二、四倍体结球甘蓝为试材,采用雌蕊整体压片荧光显微观察和石蜡切片等技术,对二、四倍体正反交的授粉受精和胚胎发育过程进行了较系统地观察比较,并对其杂交败育的原因及
This paper investigates the cooperative formation problem via impulsive control for a class of networked EulerLagrange systems.To reduce the energy consumption
The ultrafast thermomechanical coupling problem in a thin gold film irradiated by ultrashort laser pulses with different electron ballistic depths is investigat