نتایج جستجو برای: geomorphic indicators

تعداد نتایج: 110995  

Journal: :Quaternary Science Reviews 2021

Geomorphic features (fossil terraces, notches and sea cliffs) from the southern Red Sea coasts provide valuable indicators of past sea-level change that enable quantification both timing magnitude mid-Holocene highstand. We demonstrate utility wave-cut in Sea, present U-series dated two locations on As-Salif Peninsula suggest a highstand ?0.5–1 m above mean level (apmsl) at about 5–5.4 ka BP. I...

2005
Rebecca J. Dorsey Joshua J. Roering

Well-constrained case studies of transient landscape response to external forcing are needed to improve our understanding of erosion processes in tectonically active mountain belts. The Peninsular Ranges portion of the San Jacinto fault zone (SJFZ) is an excellent location for such a study because it displays pronounced geomorphic disequilibrium resulting from initiation of a major strike-slip ...

Journal: :جغرافیا و توسعه ناحیه ای 0
علی کیوان زراعتکار بهنام رحیمی

the sangbast-shandiz fault zone, with a length of about 57 km, a width of moderately 2 km, and a nw-se direction, is located about 15 km in the west of mashhad city. that is one of the major faults in the binalud mountains. geomorphic evidences illustrate that the sangbast-shandiz fault zone has dextral strike- slip offsets with thrust activity. in this article, we investigated geomorphic featu...

Journal: :Journal of environmental management 2009
Denine Schmitz Matt Blank Selita Ammondt Duncan T Patten

The restorative potential of dam removal on ecosystem function depends on the reversibility of dam effects and its operations. While dam removal is an established engineering practice, the need for an understanding of the ecological response remains. We used paleoflood hydrology, hydrologic modeling, and aerial photo interpretation to investigate the long-term ecologic responses to dam failure ...

2010
Erland A. MacIsaac

The objective of this chapter is to describe some key linkages between the ecology of salmonid fish and the hydrologic and geomorphic features of their spawning streams in British Columbia. Salmonid refers to all species in the Salmonidae family of fishes, which includes Pacific salmon and trout (Oncorhynchus spp.), char (Salvelinus spp.), grayling (Thymallus spp.), whitefish and cisco (Coregon...

2005
C. LINDVALL THOMAS K. ROCKWELL KENNETH W. HUDNUT

Offset geomorphic features along the Superstition Hills fault show evidence for at least one slip event prior to the 1987 surface rupture, and possibly as many as four to five earlier prehistoric earthquakes. We documented several geomorphic features that appeared offset by multiple events by making detailed topographic maps. Offset features were abundant along reaches of the fault with high to...

2013
G. Burch Fisher Bodo Bookhagen Colin B. Amos

a r t i c l e i n f o The rapid expansion of high-spatial resolution optical sensors and imagery over the last decade presents exceptional opportunities for quantifying visible attributes of geomorphic systems. In this study, we detail a simple, robust methodology (ChanGeom) to extract continuous channel width and centerline datasets for single-thread channels using freely available high-spatia...

2006
P. Charles Goebel Kurt S. Pregitzer Brian J. Palik

We examined the distribution of ground-flora species (herbaceous and woody species <1 m tall) across riparian areas of northeastern Wisconsin in an effort to understand how hierarchical landscape properties, such as the physiographic system (ground moraine and outwash plain), valley system (constrained and unconstrained), and valley floor landforms influence distribution patterns of ground-flor...

2014
ERIK S. JULES ALLYSON L. CARROLL ANDREA M. GARCIA CHRISTOPHER M. STEENBOCK MATTHEW J. KAUFFMAN

Invasive pathogens are becoming increasingly important in forested ecosystems, yet they are often difficult to study because of their rapid transmission. The rate and extent of pathogen spread are thought to be partially controlled by variation in host characteristics, such as when host size and location influence susceptibility. Few host-pathogen systems, however, have been used to test this p...

2011
Vance T. Holliday David J. Meltzer Rolfe Mandel

The Great Plains of the United States was the setting for some of the earliest research in North America into patterns and changes in the character of late Pleistocene environments and their effects on contemporary human populations. Many localities in the region have well-stratified records of terminal Pleistocene and early Holocene human (Paleoindian) activity and past environments. These hav...

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