TY - JOUR AU - SCHUMM, S. A AU - LICHTY, R. W PY - 2021/04/23 Y2 - 2024/03/28 TI - TIME, SPACE, AND CAUSALITY IN GEOMORPHOLOGY JF - William Morris Davis - Revista de Geomorfologia JA - WMD VL - 2 IS - 1 SE - CLASSICS OF GEOMORPHOLOGY DO - UR - //williammorrisdavis.uvanet.br/index.php/revistageomorfologia/article/view/111 SP - 1-9 AB - <p>The distinction between cause and effect in the development of landforms is a function of time and space (area) because the<br />factors that determine the character of landforms can be either dependent or independent variables as the limits of time and<br />space change. During moderately long periods of time, for example, river channel morphology is dependent on the geologic<br />and climatic environment, but during a shorter span of time, channel morphology is an independent variable influencing the<br />hydraulics of the channel.<br />During a long period of time a drainage system or its components can be considered as an open system which is<br />progressively losing potential energy and mass (erosion cycle), but over shorter spans of time self-regulation is important,<br />and components of the system may be graded or in dynamic equilibrium. During an even shorter time span a steady state may<br />ex1st. Therefore, depending on the temporal and spacial dimensions of the system under consideration, landforms can be<br />considered as either a stage in a cycle of erosion or as a system in dynamic equilibrium.</p> ER -