ISSN:0020-6024    

DOI:10.1080/02626666109493223

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

Results from 11 forest cutting experiments on small watersheds at the Coweeta Hydrologic Laboratory in western North Carolina are presented as a summary of twenty years experience in water yield studies. Conversion of mature forest to low-growing vegetation in this well-watered area increased the supply of water to streams in amounts varying from 5 to 16 inches per year. Increases in annual yield the first year after cutting mature hardwood forest in several ways were roughly proportional to the percentage of the stand cut on any one watershed, but are not yet predictable quantitatively because of variation in soils, physiography, and orientation of small drainages. Increases tend to diminish in the years following the initial treatment, whether cutting is repeated or not, but a certain portion of the increases can be maintained indefinitely by annual recutting. In general, increases are greatest during those months when normal streamflow is lowest, but water yield can be influenced during all seasons of the year. A clearer understanding of the behavior of water in soils and plants is required before our knowledge of watershed processes will allow quantitative prediction of increased yield due to forest cutting.

ISSN:0020-6024    

DOI:10.1080/02626666109493224

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666109493225

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666109493226

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666109493227

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

The Rhone changed progressively, from SE to NW, his underflow and his upperflow, advancing together in that direction. The study of the evolution of erosion show the Rize is a relic of the ancient flow. The like processus is proper to many rivers.

ISSN:0020-6024    

DOI:10.1080/02626666109493228

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666109493229

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

摘要:

Analysis of data for the White and Wabash Rivers suggests means of determining discharge at the natural bankfull stage, despite the effects of artificial embanking and clearance of channels. Bankfull discharge, and discharge at mean annual flood, undergo an orderly downstream increase in percentage duration of flow.

ISSN:0020-6024    

DOI:10.1080/02626666109493230

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666109493231

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor

ISSN:0020-6024    

DOI:10.1080/02626666109493232

出版商:Taylor & Francis Group    

年代:1961

数据来源: Taylor