RATE LAW IN FLUVIAL GEOMORPHOLOGY

被引:169
作者
GRAF, WL [1 ]
机构
[1] UNIV IOWA,DEPT GEOG,IOWA CITY,IA 52242
关键词
D O I
10.2475/ajs.277.2.178
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The impact of human activities on geomorphic systems consists primarily of the disruptions of natural processes and the disturbances of steady states. The times required for the systems to achieve new steady states after disruptions (relaxation times) are significant factors in the assessment of man's impact on landform processes. Spatial and dimensional characteristics of fluvial systems can be used as indicators of equilibrium. Dendrochronologic, photographic, and field evidence from gully networks in the Colorado Piedmont indicate that a rate law in the form of a negative exponential function similar to that used for describing relaxation times of radioactive materials and chemical mixtures provides a useful model for relaxation times in geomorphic systems.
引用
收藏
页码:178 / 191
页数:14
相关论文
共 52 条
[21]  
HUNT CB, 1954, US GEOL SURVEY B, V996, P1
[22]   VALLEY ALLUVIATION IN SOUTHWESTERN WISCONSIN [J].
KNOX, JC .
ANNALS OF THE ASSOCIATION OF AMERICAN GEOGRAPHERS, 1972, 62 (03) :401-410
[23]  
LAIDLER KJ, 1965, CHEMICAL KINETICS
[24]   QUASI-EQUILIBRIUM STATES IN CHANNEL MORPHOLOGY [J].
LANGBEIN, WB ;
LEOPOLD, LB .
AMERICAN JOURNAL OF SCIENCE, 1964, 262 (06) :782-&
[25]  
Leopold L. B., 1953, HYDRAULIC GEOMETRY S
[26]  
LEOPOLD LB, 1973, GEOL SOC AM B, V84, P208
[27]  
MEGAHAN WF, 1974, INT156 US DEP AGR FO
[28]   DEVELOPMENT OF DRAINAGE SYSTEMS ON UPRAISED LAKE FLOOR [J].
MORISAWA, M .
AMERICAN JOURNAL OF SCIENCE, 1964, 262 (03) :340-&
[29]  
Peterson H. V., 1950, APPLIED SEDIMENTATIO, P407
[30]  
SCHULMAN E, 1942, AM METEOROL SOC B, V23, P148