共查询到20条相似文献，搜索用时 15 毫秒
1.
Anne Ingeborg Myhr Terje Traavik 《Journal of Agricultural and Environmental Ethics》2002,15(4):435-437
Volume Contents
Contents of Volume 15 相似文献2.
Sediment and phosphorus (P) transport from the Minnesota River Basin to Lake Pepin on the upper Mississippi River has garnered much attention in recent years. However, there is lack of data on the extent of sediment and P contributions from riverbanks vis-à-vis uplands and ravines. Using two light detection and ranging (lidar) data sets taken in 2005 and 2009, a study was undertaken to quantify sediment and associated P losses from riverbanks in Blue Earth County, Minnesota. Volume change in river valleys as a result of bank erosion amounted to 1.71 million m over 4 yr. Volume change closely followed the trend: the Blue Earth River > the Minnesota River at the county's northern edge > the Le Sueur River > the Maple River > the Watonwan River > the Big Cobb River > Perch Creek > Little Cobb River. Using fine sediment content (silt + clay) and bulk density of 37 bank samples representing three parent materials, we estimate bank erosion contributions of 48 to 79% of the measured total suspended solids at the mouth of the Blue Earth and the Le Sueur rivers. Corresponding soluble P and total P contributions ranged from 0.13 to 0.20% and 40 to 49%, respectively. Although tall banks (>3 m high) accounted for 33% of the total length and 63% of the total area, they accounted for 75% of the volume change in river valleys. We conclude that multitemporal lidar data sets are useful in estimating bank erosion and associated P contributions over large scales, and for riverbanks that are not readily accessible for conventional surveying equipment. 相似文献
3.
K. Tybirk H. F. Alr?e P. Frederiksen 《Journal of Agricultural and Environmental Ethics》2004,17(3):221-222
Editorial Commentary
Editorial 相似文献4.
《Journal of Agricultural and Environmental Ethics》2002,15(2):239-240
Publications Received
Books Received 相似文献5.
《Journal of Agricultural and Environmental Ethics》2003,16(5):519-520
Publications Received
Books received 相似文献6.
7.
Editorial
Canada shows the way 相似文献8.
Richard P. Haynes 《Journal of Agricultural and Environmental Ethics》2002,15(2):151-154
Editorial Introduction
From the Editors 相似文献9.
Anne Ingeborg Myhr Terje Traavik 《Journal of Agricultural and Environmental Ethics》2003,16(4):315-316
Editorial Introduction
From the editors 相似文献10.
《Journal of Agricultural and Environmental Ethics》2002,15(1):143-149
Instructions for Authors
Instructions for Authors 相似文献11.
12.
《Journal of Agricultural and Environmental Ethics》2004,17(1):95-96
Publications Received
Books Received 相似文献13.
《Journal of Agricultural and Environmental Ethics》2001,14(4):463-464
Publications Received
Books Received 相似文献14.
《Journal of Agricultural and Environmental Ethics》2003,16(3):313-314
Publications Received
Books Received 相似文献15.
Guest Editorial
A view from the countryside 相似文献16.
John Veevers 《The Environmentalist》1989,9(2):142-144
News And Comments
Restoring a ravished Island 相似文献17.
18.
Conference Reports
Municipal waste combustion 相似文献19.
Richard Haynes Frans W. A. Brom Jan Elliott Peter Schaber 《Journal of Agricultural and Environmental Ethics》2000,13(1):1-5
Editorial Introduction
From the Editors 相似文献20.