RILL SEDIMENT TRANSPORT ON A PRINCE-EDWARD-ISLAND (CANADA) FINE SANDY LOAM

被引：21

作者：

EDWARDS, LM

BURNEY, JR

FRAME, PA

机构：

[1] Research Centre, Agriculture and Agri-Food Canada, Charlottetown

[2] Department of Agricultural Engineering, Technical University of Nova Scotia, Halifax

[3] Water and Earth Science Associates, Carp, Ont. K0A 1L0

来源：

SOIL TECHNOLOGY | 1995年 / 8卷 / 02期

关键词：

PREFERENTIAL FLOW; WATER EROSION; SURFACE RUNOFF; MULCHING; FREEZING; RILL EROSION;

D O I：

10.1016/0933-3630(95)00009-2

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

In order to determine the temporal variation of sediment yield under conditions of freezing, rill erosion tests were conducted on beds of a fine sandy loam soil subjected to surface how under various conditions of freezing, mulching, surface compaction, and slope. During a 20-min test period, runoff samples were collected at six sampling times to measure sediment yield Freezing, mulching, and slope had significant (P < = 0.05) effects on sediment yield. Generally, sediment yield decreased with time, although treatment units subjected to freeze-thaw (frozen at the start of the tests) or compaction showed an initial rise. The sediment yield of the latter treatments were best described by non-linear (R(2) = 0.807 to 0.969) regression models. In examining sediment size grades < 600 mu m, only the <38 mu m fraction showed significant differences in individual sample mass among sampling times. For this size grade there was a significant decrease in sediment yield for the 7% slope (R(2) = 0.901) and for bare surface (R(2) = 0.614) at later sampling.

引用

页码：127 / 138

页数：12

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