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Y. Q. Wang - One of the best experts on this subject based on the ideXlab platform.

  • A scheme for calculating Soil Moisture Content by using routine weather data
    Atmospheric Chemistry and Physics, 2007
    Co-Authors: Kezheng Shang, Shi Gong Wang, Zhen Zhou, Jing Wang, Huan Liu, Y. Q. Wang
    Abstract:

    Soil Moisture Content is one of the most important parameters as input conditions in forecasting model systems of dust storm, but it can not be directly obtained from daily routine weather report. In this paper, a scheme is developed to calculate the surface Soil Moisture Content in China by using both precipitation and evaporation. Precipitation is directly from routine weather report, while evaporation is indirectly calculated by using meteorological elements which are also from routine weather report. According to the formula by Penman, evaporation can be considered as a linear composition of dynamic evaporation and thermodynamic evaporation caused by radiation. First, an equation for calculating daily global radiation within China is given by using regression analysis and the data of global radiation and cloud cover from 116 meteorological stations in China. Then, an equation for calculating evaporation within China is given by using regression analysis and the data of cloud cover, air temperature, precipitation, relative humidity, and wind velocity from 701 meteorological stations. Finally, a scheme for calculating Soil Moisture Content within China is established by using regression analysis and the Soil Moisture Content, precipitation, and evaporation at 79 agro-meteorological stations. Validation results show that the forecasting accuracy of the Chinese dust numerical model can be improved by using this scheme.

  • A scheme for calculating Soil Moisture Content by using routine weather data
    Atmospheric Chemistry and Physics Discussions, 2007
    Co-Authors: K. Z. Shang, Shi Gong Wang, Z. J. Zhou, J. Y. Wang, H. L. Liu, Y. Q. Wang
    Abstract:

    Abstract. Soil Moisture Content is one of the most important parameters as input conditions in forecasting model systems of dust storm, but it can not be directly obtained from daily routine weather report. In this paper, a scheme is developed to calculate the surface Soil Moisture Content in China by using both precipitation and evaporation. Precipitation is directly from routine weather report, while evaporation is indirectly calculated by using meteorological elements which are also from routine weather report. According to the formula by Penman, evaporation can be considered as a linear composition of dynamic evaporation and thermodynamic evaporation caused by radiation. First, an equation for calculating daily global radiation within China is given by using regression analysis and the data of global radiation and cloud cover from 116 meteorological stations in China. Then, an equation for calculating evaporation within China is given by using regression analysis and the data of cloud cover, air temperature, precipitation, relative humidity, and wind velocity from 701 meteorological stations. Finally, a scheme for calculating Soil Moisture Content within China is established by using regression analysis and the Soil Moisture Content, precipitation, and evaporation at 79 agro-meteorological stations. Validation results show that the forecasting accuracy of the Chinese dust numerical model can be clearly increased by using this scheme.

Castorina Silva Vieira - One of the best experts on this subject based on the ideXlab platform.

  • Soil geosynthetic inclined plane shear behavior influence of Soil Moisture Content and geosynthetic type
    International Journal of Geotechnical Engineering, 2014
    Co-Authors: Maria De Lurdes Lopes, Fernanda A Ferreira, José Ricardo Carneiro, Castorina Silva Vieira
    Abstract:

    AbstractThis paper deals with the inclined plane shear on three different geosynthetics (a geocomposite (GC), a non-woven geotextile (GTX), and an extruded geogrid (GGR)) with a residual Soil from granite. Soil and geosynthetic properties, test equipment, and procedures are described. The influence of Soil Moisture Content and geosynthetic type on Soil–geosynthetic interaction behavior is discussed by analyzing the results of the inclined plane shear tests. The main conclusions that can be outlined from the present study are the following: (1) the influence of Soil Moisture Content was relevant for the Soil–GTX and Soil–GC interfaces. Indeed, the resistance of those interfaces decreased with the increase of Soil Moisture Content. No significant differences were observed between the behavior of those geosynthetics; (2) the influence of Soil Moisture Content on the behavior of the Soil–GGR interface was less evident. A slight decrease on the interface friction angle was only observed for the highest Soil mo...

  • Soil–geosynthetic inclined plane shear behavior: influence of Soil Moisture Content and geosynthetic type
    International Journal of Geotechnical Engineering, 2014
    Co-Authors: Maria De Lurdes Lopes, Fernanda A Ferreira, José Ricardo Carneiro, Castorina Silva Vieira
    Abstract:

    AbstractThis paper deals with the inclined plane shear on three different geosynthetics (a geocomposite (GC), a non-woven geotextile (GTX), and an extruded geogrid (GGR)) with a residual Soil from granite. Soil and geosynthetic properties, test equipment, and procedures are described. The influence of Soil Moisture Content and geosynthetic type on Soil–geosynthetic interaction behavior is discussed by analyzing the results of the inclined plane shear tests. The main conclusions that can be outlined from the present study are the following: (1) the influence of Soil Moisture Content was relevant for the Soil–GTX and Soil–GC interfaces. Indeed, the resistance of those interfaces decreased with the increase of Soil Moisture Content. No significant differences were observed between the behavior of those geosynthetics; (2) the influence of Soil Moisture Content on the behavior of the Soil–GGR interface was less evident. A slight decrease on the interface friction angle was only observed for the highest Soil mo...

  • Soil - Geosynthetic inclined plane shear behavior: Influence of Soil Moisture Content and geosynthetic type
    'Maney Publishing', 2014
    Co-Authors: Maria De Lurdes Lopes, José Ricardo Carneiro, Fernanda Ferreira, Castorina Silva Vieira
    Abstract:

    This paper deals with the inclined plane shear on three different geosynthetics (a geocomposite (GC), a non-woven geotextile (GTX), and an extruded geogrid (GGR)) with a residual Soil from granite. Soil and geosynthetic properties, test equipment, and procedures are described. The influence of Soil Moisture Content and geosynthetic type on Soil - geosynthetic interaction behavior is discussed by analyzing the results of the inclined plane shear tests. The main conclusions that can be outlined from the present study are the following: (1) the influence of Soil Moisture Content was relevant for the Soil - GTX and Soil - GC interfaces. Indeed, the resistance of those interfaces decreased with the increase of Soil Moisture Content. No significant differences were observed between the behavior of those geosynthetics; (2) the influence of Soil Moisture Content on the behavior of the Soil - GGR interface was less evident. A slight decrease on the interface friction angle was only observed for the highest Soil Moisture Content; (3) the dry Soil - GGR interface resistance was lower than that observed for the other two geosynthetics due to the relevance of Soil - Soil friction at the GGR apertures, to the high percentage of fines of the Soil used in the research (D50=1·00 mm), and to the smoother solid lateral surface of the extruded GGR when compared with the surface of the GTX or GC. © 2014 W. S. Maney & Son Ltd

A.w. Al-kayssi - One of the best experts on this subject based on the ideXlab platform.

  • Influence of Soil Moisture Content on Soil solarization efficiency
    Renewable Energy, 2001
    Co-Authors: A.a Al-karaghouli, A.w. Al-kayssi
    Abstract:

    Soil temperature under plastic cover is a function of incoming radiation and thermal characteristics of the mulching material and the Soil. A field experiment was conducted at Fudhiliyah Agrometeorological research station to investigate how Soil temperature is influenced by different Soil Moisture Content regimes during Soil solarization. Two Soils, sandy loam and silty clay loam, were brought to five volumetric Moisture regimes (M1–M5). The moistened Soils were mulched with 180-μm-thick transparent polyethylene. Measurements of hourly Soil temperatures for depths of 0.00, 0.05, 0.10 and 0.30 m were recorded from 1 June to 30 September. The results showed that the maximum Soil temperatures decreased with increasing Soil Moisture Content. The relationship between the hourly rise in Soil temperature and heat flux were significantly affected by Soil Moisture Content. Moreover, Soil solarization efficiency decreased with increasing Moisture Content. The higher temperatures in both Soils under the M4 irrigation regime resulted in faster eradication of the pathogenic fungus, Fusarium oxysporum (sp. lycopersici).

Maria De Lurdes Lopes - One of the best experts on this subject based on the ideXlab platform.

  • Soil geosynthetic inclined plane shear behavior influence of Soil Moisture Content and geosynthetic type
    International Journal of Geotechnical Engineering, 2014
    Co-Authors: Maria De Lurdes Lopes, Fernanda A Ferreira, José Ricardo Carneiro, Castorina Silva Vieira
    Abstract:

    AbstractThis paper deals with the inclined plane shear on three different geosynthetics (a geocomposite (GC), a non-woven geotextile (GTX), and an extruded geogrid (GGR)) with a residual Soil from granite. Soil and geosynthetic properties, test equipment, and procedures are described. The influence of Soil Moisture Content and geosynthetic type on Soil–geosynthetic interaction behavior is discussed by analyzing the results of the inclined plane shear tests. The main conclusions that can be outlined from the present study are the following: (1) the influence of Soil Moisture Content was relevant for the Soil–GTX and Soil–GC interfaces. Indeed, the resistance of those interfaces decreased with the increase of Soil Moisture Content. No significant differences were observed between the behavior of those geosynthetics; (2) the influence of Soil Moisture Content on the behavior of the Soil–GGR interface was less evident. A slight decrease on the interface friction angle was only observed for the highest Soil mo...

  • Soil–geosynthetic inclined plane shear behavior: influence of Soil Moisture Content and geosynthetic type
    International Journal of Geotechnical Engineering, 2014
    Co-Authors: Maria De Lurdes Lopes, Fernanda A Ferreira, José Ricardo Carneiro, Castorina Silva Vieira
    Abstract:

    AbstractThis paper deals with the inclined plane shear on three different geosynthetics (a geocomposite (GC), a non-woven geotextile (GTX), and an extruded geogrid (GGR)) with a residual Soil from granite. Soil and geosynthetic properties, test equipment, and procedures are described. The influence of Soil Moisture Content and geosynthetic type on Soil–geosynthetic interaction behavior is discussed by analyzing the results of the inclined plane shear tests. The main conclusions that can be outlined from the present study are the following: (1) the influence of Soil Moisture Content was relevant for the Soil–GTX and Soil–GC interfaces. Indeed, the resistance of those interfaces decreased with the increase of Soil Moisture Content. No significant differences were observed between the behavior of those geosynthetics; (2) the influence of Soil Moisture Content on the behavior of the Soil–GGR interface was less evident. A slight decrease on the interface friction angle was only observed for the highest Soil mo...

  • Soil - Geosynthetic inclined plane shear behavior: Influence of Soil Moisture Content and geosynthetic type
    'Maney Publishing', 2014
    Co-Authors: Maria De Lurdes Lopes, José Ricardo Carneiro, Fernanda Ferreira, Castorina Silva Vieira
    Abstract:

    This paper deals with the inclined plane shear on three different geosynthetics (a geocomposite (GC), a non-woven geotextile (GTX), and an extruded geogrid (GGR)) with a residual Soil from granite. Soil and geosynthetic properties, test equipment, and procedures are described. The influence of Soil Moisture Content and geosynthetic type on Soil - geosynthetic interaction behavior is discussed by analyzing the results of the inclined plane shear tests. The main conclusions that can be outlined from the present study are the following: (1) the influence of Soil Moisture Content was relevant for the Soil - GTX and Soil - GC interfaces. Indeed, the resistance of those interfaces decreased with the increase of Soil Moisture Content. No significant differences were observed between the behavior of those geosynthetics; (2) the influence of Soil Moisture Content on the behavior of the Soil - GGR interface was less evident. A slight decrease on the interface friction angle was only observed for the highest Soil Moisture Content; (3) the dry Soil - GGR interface resistance was lower than that observed for the other two geosynthetics due to the relevance of Soil - Soil friction at the GGR apertures, to the high percentage of fines of the Soil used in the research (D50=1·00 mm), and to the smoother solid lateral surface of the extruded GGR when compared with the surface of the GTX or GC. © 2014 W. S. Maney & Son Ltd

A.a Al-karaghouli - One of the best experts on this subject based on the ideXlab platform.

  • Influence of Soil Moisture Content on Soil solarization efficiency
    Renewable Energy, 2001
    Co-Authors: A.a Al-karaghouli, A.w. Al-kayssi
    Abstract:

    Soil temperature under plastic cover is a function of incoming radiation and thermal characteristics of the mulching material and the Soil. A field experiment was conducted at Fudhiliyah Agrometeorological research station to investigate how Soil temperature is influenced by different Soil Moisture Content regimes during Soil solarization. Two Soils, sandy loam and silty clay loam, were brought to five volumetric Moisture regimes (M1–M5). The moistened Soils were mulched with 180-μm-thick transparent polyethylene. Measurements of hourly Soil temperatures for depths of 0.00, 0.05, 0.10 and 0.30 m were recorded from 1 June to 30 September. The results showed that the maximum Soil temperatures decreased with increasing Soil Moisture Content. The relationship between the hourly rise in Soil temperature and heat flux were significantly affected by Soil Moisture Content. Moreover, Soil solarization efficiency decreased with increasing Moisture Content. The higher temperatures in both Soils under the M4 irrigation regime resulted in faster eradication of the pathogenic fungus, Fusarium oxysporum (sp. lycopersici).