Sentence examples for concentration at depth from inspiring English sources
where D is the diffusion coefficient and C is the hydrogen concentration at depth x and time t.
In the slab model the chloride concentration at depth x and time t depends on the error function: erfleft( {frac{x}{{2sqrt {Dt} }}} right) (10).
where C222 z) is the 222Rn concentration at depth z (positive downward from the surface), ϕ is the 222Rn production rate per unit time, and ϵ is the soil porosity.
C x, t = C 0 1 - e r f x 2 D t (2 C( x,t ) is the chloride concentration at depth x and time t, C0 is the surface chloride diffusion (lb/yd3 or kg/m3), erf is the error function (a mathematical function), D is the chloride diffusion coefficient (in2/year or cm2/year).
The observation deduced from Fig. 7 is confirmed by the data collected in Tables 1, 2, 3 and 4. Open image in new window Fig. 7 Ratio of the chloride concentration at depth x or ( rho_{1} ) from the external exposed surface C and the chloride concentration on the external surface C 0 as function of time of exposure to chloride t.
In the circular model the chloride concentration at depth ( rho ) at the time t is a function of the sum of products of an exponential term and a ratio of Bessel's first functions: frac{2}{R}sumlimits_{m = 1}^{infty } {frac{1}{{alpha_{m} }}frac{{J_{0} left( {rho alpha_{m} } right)}}{{J_{1} left( {Ralpha_{m} } right)}}e^{{left( { - Dalpha_{m}^{2} t} right)}} } (11).
At these stations, maximum DO concentration was found at a depth of around 5 m and maximum Chl-a concentration at depths between 50 and 75 m.
After 2 years of operation, monitoring points located within 1 m of the downgradient edge of the PRB showed significant decreases in arsenic concentrations at depth intervals impacted by the emplaced zerovalent iron.
kern-0pt} {partial x}}) (Crank 1975): J_{text{c}} = - Dfrac{{partial C_{text{f}} }}{partial x}, (1 where (J_{text{c}}) is the flux of chloride ions due to diffusion (kg/m2s); (D) is the diffusion coefficient (m2/s); and (C_{text{f}}) is the free chloride concentration (kg/m3) at depth (x) ((m)).
Dissolved oxygen (DO) concentrations at depths 75.0 to 79.3 m below surface in 2002, determined using a CHEMetrics colorimetric kit, were 0.05 to 0.3 mg L-1.
Reduced inorganic sulfur (RIS) was found in highest concentrations at depths of 0 to 20 cm and was significantly positively correlated with total soil C and N contents.
