Karst Depression Morphology in South Central Kentucky
Karst Depression Morphology in South Central Kentucky
复制标题
肯塔基州中南部喀斯特洼地形态
DOI：
10.1080/04353676.1968.11879775
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发表时间：
1968
期刊：
影响因子：
--
通讯作者：
P. L. Valle
中科院分区：
文献类型：
--
作者：
P. L. Valle
对肯塔基州中南部部分地区的岩溶洼地形态进行了岩性、构造和侵蚀系统中相对位置的分析。通过平均抑郁缓解指数、平均抑郁面积和平均抑郁侧坡倾斜指数评价抑郁形态。在以下情况下，平均洼地面积、地貌起伏和侧坡倾斜度具有较大的值：1.石灰岩的特征是平均不溶残留物含量低；2.岩溶侵蚀系统的特征是高水力梯度(这是通过岩溶起伏比来衡量的)；3.任何地区的大部分地表径流都被分流到岩溶地下洞穴排水系统；4.高比例的岩溶洼地被调整到构造薄弱线；5.遇到致密的石灰岩；以及6.在岩溶排水系统的河口附近具有特征的地区。在这些条件的任何组合不占优势的情况下，平均凹陷缓解、面积和侧坡倾斜度降低。回归分析表明，凹陷起伏变化的92%、凹陷地区变化的70%、凹陷两侧坡度变化的73%是由岩性、构造、岩溶水系几何形状和侵蚀系统相对位置的变化引起的。
Karst depression morphology was analysed with respect to elements of lithology, structure, and relative location in the erosion system in a part of South Central Kentucky. Depression morphology was assessed by mean depression relief, mean depression area, and mean depression flank slope inclination indices. Mean depression area, relief, and flank slope inclination had large values where the following conditions prevailed: 1. where limestones were characterized by low mean insoluble residue contents; 2. where high hydraulic gradients characterized the karst erosion system (this was measured by the karst relief ratio); 3. where a large percentage of the surface runoff in any area was diverted to the karst underground cavern drainage systems; 4. where a high percentage of the karst depressions were adjusted to lines of structural weakness; 5. where dense limestones were encountered; and 6. in areas which were characterized by a location near the mouth of the karst drainage system. Mean depression relief, area, and flank slope inclination decreased where any combination of these conditions did not prevail. Regression studies revealed that 92% of the variations of depression relief, 70% of the variations of depression areas, and 73% of the variations of depression flank slopes are accounted for by variations in lithology, structure, karst drainage system geometry, and relative location in the erosion systems.