地貌相关分析公式
（1）秦皇岛滨海区相邻两级阶地之高差的沿程变化：
式中，
为相邻两级阶地之高差（i=1,2,3），且
=
-
=6.2+4.29S-0.594
，
=
-
=3.2+3.02S-0.424
,
=
=3.3-0.911S+0.290
;S为距出山口的距离；a,b,c为常数。
（2）各期累计抬升高度间的内在联系：
（3）抬升梯度（抬升幅度随距离的变化率）：
式中，△为抬升梯度。
（4）海滩视宽度B（m）与海滩坡度α（°）的关系：
（5）海滩视宽度B（m）与海滩中潮位砂的中值粒径
（mm）之关系：
（6）流域面积B（k
）与河长L（km）间有良好正比直线关系：
F=11.23L-125
参考文献：
蒋忠信：秦皇岛滨海区地貌的相关分析。地理学报，1981,36（1）
FormulaOfRelationshipBetweenBeachWidthAndSandMedianDiameter
The Great Artesian Basin, also known as the "Great Australian Basin", is the world's third largest basin and the world's largest gravity basin. In Australia, is the world's largest gravity basin, located in the eastern part of the Australian mainland. In the Australian rock layer, covered with impermeable layer, the eastern part of the rain, the formation of water, groundwater flow at an annual rate of 11 to 16 meters flowing to the western region. Confined water through the drilling or natural springs and other gushing surface, so the river basin hence the name. The development of animal husbandry in Australia benefited from this unique terrain.
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