scholarly journals Mosaic desert pavement influences water infiltration and vegetation distribution on fluvial fan surfaces

2021 ◽  
Vol 35 (9) ◽  
Author(s):  
Dejin Wang ◽  
Wenzhi Zhao ◽  
Hong Zhou ◽  
Weicheng Luo ◽  
Hu Liu
Keyword(s):  
Water Infiltration ◽  
Vegetation Distribution ◽  
Desert Pavement

scholarly journals Mosaic desert pavement influences water infiltration and vegetation distribution on fluvial fan surfaces

2021 ◽  
Author(s):  
Dejin Wang ◽  
Wenzhi Zhao ◽  
zhou hong ◽  
Weicheng Luo
Keyword(s):  
Arid Regions ◽  
Hydrological Cycle ◽  
Infiltration Rate ◽  
Water Infiltration ◽  
Vegetation Distribution ◽  
Ecological Stability ◽  
Near Surface ◽  
Desert Pavement ◽  
Gravel Size ◽  
Vesicular Horizon

Desert pavements are critical for maintaining ecological stability and promoting near-surface hydrological cycle in arid regions. However, few studies have reported the desert pavements on ecological on fluvial fans. Although desert pavement surfaces appear to be barren and flat, we found that the surfaces were featured by mosaic pattern of desert pavement (DP) and bare ground (BG). In this study, we investigated the effects of mosaic DP on water infiltration and vegetation distribution at six sites (i.e. one on the hillside and five in the sectors of fluvial fans) along a southwest belt transect on the fluvial fans in the Northern Linze County, in the middle of Hexi Corridor. The results showed that significant differences of Mosaic DP between hillside and sectors of fans were found in pavement thickness, thickness of vesicular horizon (Av thickness), particle composition and bulk density, rather than soil moisture content (SMC), gravel coverage and surface gravel size. The mosaic DP can inhibit water infiltration by pavement layer, where the sorptivity (S), initial infiltration rate (i) and steady- state infiltration rate (i) and infiltration time (T) averaged 1.30 cm/min-0.5, 5.03 cm/min, 0.23 cm/min, and 12.76 min respectively. If pavement layer was scalped, the S, i and i increased by 0.75 cm/min-0.5, 2.90 cm/min and 0.13 cm/min, respectively, and the T was shortened by 5.34 min. Water infiltration was mainly controlled by the pavement layer thickness (+), Av thickness (-), surface gravel coverage (-), and fine earth (+) and fine gravel (-) of pavement layer. Mosaic DP grew less shrubs than mosaic BG where distributed plenty of herbs. It can be concluded that desert pavements can keep vegetation stability by self-regulating rainfall. This study would deepen our understanding of the eco-hydrological cycle of pavement landscape in arid regions.

Comparative study of the impact of two mechanical perforation densities on the behavior of a sandy soil

2012 ◽  
Vol 8 (1) ◽  
pp. 37-48
Author(s):  
S. Chehaibi ◽  
K. Abrougui ◽  
F. Haouala
Keyword(s):  
Soil Water ◽  
Sandy Soil ◽  
Water Infiltration ◽  
Cone Penetration ◽  
Initial State ◽  
Soil Water Infiltration ◽  
Good Improvement ◽  
The Impact ◽  
Positive Effect ◽  
Resistance To Penetration

The effects of mechanical perforation densities by extracting soil cores through an aerator Vertidrain with a working width of 1.6 m and equipped with hollow tines spaced of 65 mm, were studied on a sandy soil of a grassy sward in the Golf Course El Kantaoui in Sousse (Tunisia). The mechanical aeration was performed at two densities: 250 and 350 holes/m2. The cone penetration resistance and soil water infiltration were measured. These parameters were performed at initial state before aeration (E0) and then on the 10th, 20th and 30th day after aeration. These results showed that perforation density of 350 holes/m2 had a positive effect on the soil by reducing its cone resistance to penetration compared to the initial state (Rp = 14.8 daN/cm2). At 5 cm depth the decrease in resistance to penetration was 34% and 43% on the 10th and 20th day after aeration, respectively. However, on the 30th day after aeration the soil resistance to penetration tended to grow and its value compared to the initial state decreased only by 21 and 26%, respectively, at 5 and 15 cm of depth only by 10% and 9% with 250 holes/m2 density. The soil water infiltration made a good improvement after aeration compared to the initial state. This parameter increased from 4.8 cm/h to 8.3, 10.9 and 13.1 cm/h with 250 holes/m2 density and to 10, 12.9 and 14.8 cm/h with 350 holes/m2 density on the 10th, 20th and 30th day following the aeration.

Soil water infiltration after oilseed crop introduction into a Pacific Northwest winter wheat–fallow rotation

2020 ◽  
Vol 75 (6) ◽  
pp. 739-745
Author(s):  
J.D. Williams ◽  
C. Reardon ◽  
S.B. Wuest ◽  
D.S. Long
Keyword(s):  
Winter Wheat ◽  
Soil Water ◽  
Pacific Northwest ◽  
Water Infiltration ◽  
Oilseed Crop ◽  
Soil Water Infiltration

A High-Efficient Algorithm for Sample-Based Synthesis of Vegetation Distribution

2018 ◽  
Vol 30 (12) ◽  
pp. 2203
Author(s):  
Lin Lin ◽  
Gang Yang ◽  
Weiqun Cao ◽  
Hanqiu Sun
Keyword(s):  
Efficient Algorithm ◽  
Vegetation Distribution ◽  
High Efficient

Effect of Chemical and Tillage Summer Fallow upon Water‐Infiltration Rates

1955 ◽  
Vol 47 (5) ◽  
pp. 235-236 ◽  
Author(s):  
O. K. Barnes ◽  
D. W. Bohmont ◽  
Frank Rauzi
Keyword(s):  
Water Infiltration ◽  
Infiltration Rates ◽  
Summer Fallow

Water Infiltration and Storage affected by Subsoiling and Subsequent Tillage

2003 ◽  
Vol 67 (3) ◽  
pp. 859 ◽  
Author(s):  
Joseph L. Pikul ◽  
J. Kristian Aase
Keyword(s):  
Water Infiltration ◽  
And Storage

QUANTIFYING WATER INFILTRATION INTO CORONADO CAVE AT CORONADO NATIONAL MEMORIAL, ARIZONA

2016 ◽  
Author(s):  
Brittiny Paige Moore ◽  
Keyword(s):  
Water Infiltration
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