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首页> 外文期刊>Journal of the American Water Resources Association >RELATIVE IMPORTANCE OF INTRINSIC, EXTRINSIC, AND ANTHROPIC FACTORS IN THE GEOMORPHIC ZONATION OF THE TRINITY RIVER, TEXAS
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RELATIVE IMPORTANCE OF INTRINSIC, EXTRINSIC, AND ANTHROPIC FACTORS IN THE GEOMORPHIC ZONATION OF THE TRINITY RIVER, TEXAS

机译：内在，外在和人类因素在德克萨斯州三位河流的地貌分区中的相对重要性

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摘要

The Trinity River, Texas, was characterized according to its geologic framework, valley width and confinement, slope, sinuosity, channel-floodplain connectivity, and flow regime, leading to the identification of 18 hinge points along the 638 km study area where major transitions in two or more criteria occur. These, and effects of human agency, avulsions, and sea level rise, delineate 21 river styles or zones. Each zone was evaluated with respect to dominant factors determining its geomorphological characteristics: geology/lithology, tectonics, Holocene sea level rise, meandering, cutoffs and other lateral channel changes, avulsions, valley constrictions by alluvial terraces, and paleomeander depressions. Direct human influences (a large impoundment and water withdrawals) are also evident. Entropy of the relationships between these controls and the geomorphological zones shows that all the controls are significant, and each accounts for 4-15% of the total entropy. Geologic controls, lateral channel changes, and constriction by terraces are the three most influential controls, illustrating that controls on river morphology include extrinsic boundary conditions, active process-form interrelationships, and inherited features. Extrinsic and intrinsic controls each account for about a third of the entropy, but the latter includes antecedent features as well as active channel dynamics, underscoring the importance of historical contingency even in alluvial rivers.
机译：得克萨斯州三一河（Trinity River）的特征在于其地质框架，谷宽和范围，坡度，弯曲度，河道-洪泛区连通性和水流状况，从而确定了沿638 km研究区的18个枢纽点，这些区域主要发生了过渡。出现两个或多个条件。这些以及人类活动，撕裂和海平面上升的影响勾勒出21种河流样式或区域。评估每个区域的主要因素决定了其地貌特征：地质/岩性，构造，全新世海平面上升，曲折，截断和其他横向河道变化，撕脱，冲积阶地的山谷收缩和古冰川洼地。人类的直接影响（大量蓄水和取水）也很明显。这些控制与地貌区之间的关系的熵表明，所有控制都很重要，每个控制占总熵的4-15％。地质控制，横向河道变化和梯田收缩是三个最具影响力的控制，说明对河流形态的控制包括外部边界条件，活跃的过程形式相互关系和继承的特征。外在控制和内在控制各占大约熵的三分之一，但后者包括先验特征以及活跃的河道动力学，从而强调了即使在冲积河流中，历史偶然性的重要性。

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