نتایج جستجو برای: cumulative infiltration
تعداد نتایج: 123410 فیلتر نتایج به سال:
The farmland in Yinchuan is composed of sierozem soil, which characterized by high sand content and low organic matter content, resulting poor water-holding capacity weak soil structure. Humic acid a natural polymer amendment. It critical to study how humic affects water infiltration at the microlevel. A one-dimensional vertical experiment was conducted explore adding different amounts (0, 1%, ...
Infiltration is the process of water penetration from the ground surface into the soil and is an important process in the hydrological cycle by which surface runoff and groundwater recharge can be linked. Over the years, the importance of the infiltration process resulted in the development of several simplified analytical models for predicting infiltration. These infiltration models range from...
DDesigned and undersigned fires in rangelands affect vegetation and soil, and then are necessary to give enough knowledge about them. Infiltration is one characteristic that have predict had affected by fire but had not studied enough yet. So spot fire have been seen in Artemisia aucheri type in Charat sub watershed at Mazandaran province, in this research were investigated primary, final infil...
The aim of this study was to compare the influence a final rinse with and without passive ultrasonic irrigation (PUI), using 17% ethylenediaminetetraacetic acid (EDTA) or 10% citric (CA), 2.5% sodium hypochlorite (NaOCl) PUI, on sealing ability root canal fillings. Root instrumentation performed in single-rooted premolars NaOCl as irrigant. Subsequently, roots were randomly allocated into four ...
Interlayer soil is common in southern Xinjiang, because interlayer can reduce the infiltration rate of water. To simulate heavy saline–alkali cotton fields, this paper adopted a vertical one-dimensional test. T1 (315 mm), T2 (270 and T3 (225 mm) different positions (T5, 315 thicknesses (T6, with same irrigation volume, as well one perforation sand filling treatment (T4, were set. The influence ...
Infiltration is the process of water penetration from the ground surface into the soil and is an important process in the hydrological cycle by which surface runoff and groundwater recharge can be linked. Over the years, the importance of the infiltration process resulted in the development of several simplified analytical models for predicting infiltration. These infiltration models range from...
Due to increasing demand for limited water resources, the pressure on irrigation used in agricultural production is also increasing. One of alternative solutions meet needed use low-quality resources. However, these waters can cause serious problems environment, especially soil and plants, short, medium long term. The sodium concentration affects structure soil, infiltration rate hydraulic cond...
Quantitative description of the spatial variability of soil hydraulic characteristics is crucial for planning, management and the optimum application. Field measurement of infiltration is very expensive, time-consuming and laborious. Soil structure also important effects on water infiltration in the soil. The objectives of this study were to determine the spatial variability of water infiltrati...
Simulation of water and solute transport in soil is very useful for optimum management of water and fertilizer use. In this study, the HYDRUS-1D model was used to simulate water and nitrate transport in furrow irrigation of sugarcane. For this putpose, a large-scale experiment was performed as a split plot design based on the randomized complete blocks with 3 replications in a 25-hectare piece ...
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