Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/esp.3343 |
Distribution and properties of soft weathered bedrock at 1m depth in the contiguous United States | |
Wald, Jonathan A.1; Graham, Robert C.2; Schoeneberger, Phillip J.3 | |
通讯作者 | Graham, Robert C. |
来源期刊 | EARTH SURFACE PROCESSES AND LANDFORMS
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ISSN | 0197-9337 |
出版年 | 2013 |
卷号 | 38期号:6页码:614-626 |
英文摘要 | The weathered bedrock zone is increasingly recognized as an important part of ecological and hydrologic systems, but its distribution is poorly known in the contiguous United States. We used spatial and laboratory characterization data from the US Department of Agriculture (USDA)-Natural Resources Conservation Service to assess the distribution and soil-like properties of soft weathered bedrock (saprock and saprolite) within the 48 contiguous United States. Because USDA soil inventories generally do not extend below 2m, and because the upper 1m is clearly involved in ecosystem function and vadose zone hydrology, we restricted our inquiry to soft weathered bedrock within 1m of the land surface. Soft weathered bedrock within 1m of the land surface is widespread throughout the contiguous United States, underlying at least 6% of the land area. In-depth analysis of three states showed that soft weathered bedrock at the 1-m depth underlies 22% of the total land area in California, 33% in Wyoming, and 18% in North Carolina. Soft weathered bedrock hosts pedogenic activity, as indicated by morphological features such as roots, clay films, and iron (Fe)-/manganese (Mn)-oxide concretions recorded in pedon descriptions in the database. The physical and chemical properties of soft weathered bedrock are often similar to those of the overlying soil, suggesting that in many respects soft weathered bedrock behaves like soil. It supplies water and nutrients to plants whose roots penetrate into it and it modulates throughflow runoff to streams. For a more complete understanding of soft weathered bedrock, systematic data are needed on its thickness across landscapes and a consistent terminology for its various forms needs to be adopted and widely used. Copyright (c) 2012 John Wiley & Sons, Ltd. |
英文关键词 | regolith weathering soil bedrock saprolite |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000318047700007 |
WOS关键词 | NORTH-CAROLINA PIEDMONT ; MIXED-CONIFER FOREST ; GRANITIC BEDROCK ; HYDRAULIC CONDUCTIVITY ; ARCTOSTAPHYLOS-PATULA ; SOUTHERN CALIFORNIA ; SEDIMENTARY-ROCK ; PINUS-JEFFREYI ; MOJAVE DESERT ; WATER STATUS |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/176638 |
作者单位 | 1.Civil Engineer Squadron CEA, Fairchild AFB, WA USA; 2.Univ Calif Riverside, Soil & Water Sci Program, Dept Environm Sci, Riverside, CA 92521 USA; 3.USDA NRCS, Natl Soil Survey Ctr, Lincoln, NE USA |
推荐引用方式 GB/T 7714 | Wald, Jonathan A.,Graham, Robert C.,Schoeneberger, Phillip J.. Distribution and properties of soft weathered bedrock at 1m depth in the contiguous United States[J],2013,38(6):614-626. |
APA | Wald, Jonathan A.,Graham, Robert C.,&Schoeneberger, Phillip J..(2013).Distribution and properties of soft weathered bedrock at 1m depth in the contiguous United States.EARTH SURFACE PROCESSES AND LANDFORMS,38(6),614-626. |
MLA | Wald, Jonathan A.,et al."Distribution and properties of soft weathered bedrock at 1m depth in the contiguous United States".EARTH SURFACE PROCESSES AND LANDFORMS 38.6(2013):614-626. |
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