Runoff and Soil Loss of a Typical Subtropical Forest Stricken by Wenchuan Earthquake

2013 ◽  
Vol 19 (5) ◽  
pp. 766-773
Author(s):  
Jinniu WANG ◽  
Geng SUN ◽  
Fusun SHI ◽  
Jiceng XU ◽  
Yan WU ◽  
...  
Keyword(s):  
Wenchuan Earthquake ◽  
Soil Loss ◽  
Subtropical Forest ◽  
Runoff And Soil Loss

ASSESSMENT OF SOIL EROSION IN VINH LINH, QUANG TRI USING RMMF MODEL (REVISED MORGAN - MORGAN - FINNEY)

2013 ◽  
Vol 83 (5) ◽  
Author(s):  
Nguyễn Quang Việt ◽  
Trương Đình Trọng ◽  
Hồ Thị Nga
Keyword(s):  
Soil Erosion ◽  
Land Cover ◽  
Soil Loss ◽  
Soil Particle ◽  
Transport Capacity ◽  
Gis Technology ◽  
Particle Detachment ◽  
Sediment Transport Capacity ◽  
Northern District ◽  
Runoff And Soil Loss

Vinh Linh, the northern district of Quang Tri province is characterized by a diversified topography with a large variety of elevations, high rainfall, and decreasing land cover due to forest exploiting for cultivation land. Thus, there is a high risk of erosion, soil fertility washout. With the support of GIS technology, the authors used the rMMF model to measure soil erosion. The input data of model including 15 coefficients related to topography, soil properties, climate and land cover. The simulations of rMMF include estimates of rainfall energy, runoff, soil particle detachment by raindrop, soil particle detachment by runoff, sediment transport capacity of runoff and soil loss. The result showed that amount of soil loss in year is estimated to vary between 0 kg/m2 minimum and 149 kg/m2 maximum and is divided into 4-classes of erosion. Light class almost covers the region researched (75.9% of total area), while moderate class occupies 8.1% of total area, strong classes only hold small area (16% of total area). Therefore, protection of the forest floor in sloping areas is one of the most effective methods to reduce soil erosion.

scholarly journals The effects of vegetation on runoff and soil loss: Multidimensional structure analysis and scale characteristics

2017 ◽  
Vol 28 (1) ◽  
pp. 59-78 ◽  
Author(s):  
Jianbo Liu ◽  
Guangyao Gao ◽  
Shuai Wang ◽  
Lei Jiao ◽  
Xing Wu ◽  
...  
Keyword(s):  
Structure Analysis ◽  
Soil Loss ◽  
Scale Characteristics ◽  
Runoff And Soil Loss

Effects of two crop rotations on seasonal runoff and soil loss in the Peace River region

1991 ◽  
Vol 71 (4) ◽  
pp. 533-543 ◽  
Author(s):  
L. J. P. Van Vliet ◽  
J. W. Hall
Keyword(s):  
Soil Loss ◽  
Crop Rotations ◽  
Snowmelt Runoff ◽  
Hordeum Vulgare L ◽  
Peace River ◽  
Residual Variation ◽  
River Region ◽  
Seasonal Runoff ◽  
Runoff And Soil Loss ◽  
Soil Losses

Four erosion plots were monitored from 1983 to 1989 (6 yr) to evaluate the effects of two crop rotations and their constituent crops on runoff and soil loss under natural precipitation near Fort St. John in the Peace River region of British Columbia. Rotation 1 consisted of two cycles of summerfallow — canola (Brassica rapa)-barley (Hordeum vulgare L.), and Rotation 2 included summerfallow — canola-barley-barley underseed to red fescue (Festuca rubra L.)-fescue-fescue. Rainfall and snowmelt runoff were collected and sampled throughout the year to determine seasonal runoff and soil losses. Over the 6 yr, the cumulative runoff and soil losses were consistently greater under Rotation 1 than under Rotation 2. There was a greater than fourfold difference in total soil loss, and 33–35% more total runoff. Rainfall-induced runoff and soil losses were significantly higher for Rotation 1 than for Rotation 2. Snowmelt runoff accounted for 90 and 96% of the total annual runoff and for 39 and 80% of the total annual soil loss from Rotations 1 and 2, respectively. Two large rainfall events during 1983 and 1987, each causing a soil loss in excess of 2000 kg ha−1, accounted for between 85 and 91% of the 6-yr total rainfall-induced erosion from Rotation 1. No differences in runoff or soil loss were detected among crops but the comparisons were insensitive because of high residual variation. Key words: Runoff, soil loss, erosion plots, crop rotations

scholarly journals Field Determination of the Specific Input Characteristics to Calculate the Value of C Factor of Time-variable Crops for the Revised Universal Soil Loss Equation (RUSLE)

2013 ◽  
Vol 1 (No. 1) ◽  
pp. 10-15 ◽  
Author(s):  
Jakubíková Alena ◽  
Tippl Miloslav Janeček and Martin
Keyword(s):  
Soil Loss ◽  
Canopy Cover ◽  
Agricultural Crops ◽  
Growth Phases ◽  
Specific Input ◽  
Rain Drops ◽  
Basic Characteristics ◽  
Runoff And Soil Loss ◽  
Fall Height

To determine specific characteristics necessary for the computation of the C factor in RUSLE for timevariable crops, measurements were carried out in fields with selected agricultural crops grown by conventional practices. Sloping plots on an experimental area in Třebsin locality and farm fields were used to measure surface runoff and soil loss by erosion in conditions of natural and simulated rainfall. Basic characteristics to compute the C factor were determined in the particular growth phases of selected crops – sunflower, flax, poppy and rape. Effective root mass, canopy cover and fall height of rain drops were measured.

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