estimation of soil hydraulic properties

... For assessment of the impact of wastewater,  soil samples were taken from the topsoil (0‐20  cm)  of  all  study  sites  in  peri‐urban  areas  of  Hanoi (n=4) and Nam Dinh (n=8) using a soil  auger.  ... 8Nguyen Manh Khai et al. / VNU Journal of Science, Earth Sciences 24 (2008) 87‐95   934. Discussion  Analyses  of  soil  samples  collected  to  assess the impacts of sewage irrigation on the  irrigated agricultural soils of peri‐urban areas  ... College of Science, VNU  2  Department of Environmental Impact Assessment and Appraisal,   Ministry of Natural Resources and Environment (MONRE)  3 Soils and Fertilizers Institute  4  Department of  Soil Sciences and Environment,  ...

Ngày tải lên: 14/03/2014, 15:20

... 1ROLE OF UNCERTAINTY IN SOIL HYDRAULIC PROPERTIES IN RAINFALL-INDUCED LANDSLIDES ANASTASIA MARIA SANTOSO NATIONAL UNIVERSITY OF SINGAPORE 2011 Trang 2ROLE OF UNCERTAINTY IN SOIL HYDRAULIC PROPERTIES ... thesis The effects of variability of soil properties, particularly the soil spatial variability, towards the soil pressure Trang 37head, factor of safety of the slope, and probability of slope failure ... that soil hydraulic properties are among the most important governing factors Given the dearth of prior work, the scope is restricted: (1) statistical characterization of soil hydraulic properties...

Ngày tải lên: 10/09/2015, 15:50

... satisfaction of the dissertation requirement for the degree of Doctor of Philosophy Professor of Civil Engineering Chair of Examining Committee Executive Officer Supervisory Committee Prof Reza Khanbilvardi ... part of the dielectric constant of a soil-water-air mixture ε “ Imaginary part of the dielectric constant of a soil-water-air mixture εa Dielectric constant of air εi Dielectric constant of ... measurements of soil moisture cannot be related to the spatial variability of the soil moisture profile Recent research has focused on retrieval of soil moisture by reducing the influence of these...

Ngày tải lên: 13/11/2014, 15:53

... Analysis of Soil Chemical Properties of Bastar District, Chhattisgarh, India P Smriti Rao 1* , Tarence Thomas 1 , Amit Chattree 2 , Joy Dawson 3 and Narendra Swaroop 1 1 Department of Soil Science, ... accumulated on the soil surface, move down to deep layers of soil and eventually change the soil physio-chemical properties directly or indirectly metals contamination in soil ranges from less ... The influence of the development of NMDC on the soil physicochemical characteristics is the primary objective of the study Soil is a dynamic natural body which develops as a result of pedogenic...

Ngày tải lên: 13/01/2020, 08:23

... interpretation of soil hydraulic conductivity vis-à-vis other soil properties Results and Discussion Physical, hydro-physical and chemical characteristics of soils The mechanical separates of the soils ... higher clay content in the soils is the impediment of Ks and thus decreased the soil water movement in the soil profile Trang 4Regressive models of soil saturated hydraulic conductivity An attempt ... predicting variance of hydraulic conductivity of soils under rice-mustard cropping system Table.7 Principal component matrix for predicting variance of hydraulic conductivity of soils under rice-fallow...

Ngày tải lên: 30/05/2020, 20:55

... rainfall and type of soil It was estimated by the Bureau of Soils and Water Management that about 623 million tonnes of soil is lost annually from 28 million ha of land in the country Soil erosion ... Because of the potential seriousness of some impacts, the estimation of soil loss is necessary The estimation is useful, among others in understanding the sources, predict the trend of erosion ... Management) Faculty of Resource Science and Technology Trang 2of soil erosion (Lopez and Albaladejo, 1990) A review of the impacts of soil degradation found that 1.2 billion ha (almost 11% of the vegetative...

Ngày tải lên: 12/12/2020, 07:40

... rainfall and type of soil It was estimated by the Bureau of Soils and Water Management that about 623 million tonnes of soil is lost annually from 28 million ha of land in the country Soil erosion ... Because of the potential seriousness of some impacts, the estimation of soil loss is necessary The estimation is useful, among others in understanding the sources, predict the trend of erosion ... Management) Faculty of Resource Science and Technology Trang 2of soil erosion (Lopez and Albaladejo, 1990) A review of the impacts of soil degradation found that 1.2 billion ha (almost 11% of the vegetative...

Ngày tải lên: 22/03/2021, 20:37

... rainfall and type of soil It was estimated by the Bureau of Soils and Water Management that about 623 million tonnes of soil is lost annually from 28 million ha of land in the country Soil erosion ... eroding soil can contaminate or pollute downstream water sources and recreational areas Because of the potential seriousness of some impacts, the estimation of soil loss is necessary The estimation ... activities, the reduction of plant cover, and the nature of the parent material are the main causes of soil erosion (Lopez and Albaladejo, 1990) A review of the impacts of soil degradation found...

Ngày tải lên: 16/08/2021, 14:25

... activities, thereduction of plant cover, and the nature of the parent material are the main causes of soil erosion (Lopez and Albaladejo, 1990) A review of the impacts of soil degradation found ... Because of the potential soriousness of some impacts, theestimation of soil loss is necessary, The estimation is useful, among others in understanding the sources, predict the trend of erosion ... rainfall and type of soil Tt was estimated by theBureau of Soils and Water Management that about 623 million tonnes of soi is lostannually from 28 million ha of land in the country ‘Soil erosion in...

Ngày tải lên: 23/04/2024, 10:15

... rainfall and type of soil It was estimated by the Bureau of Soils and Water Management that about 623 million tonnes of soil is lost annually from 28 million ha of land in the country, ‘Soil erosion ... Because of the potential seriousness of some impacts, the estimation of soil loss is uevesvary, The estimation is useful, among olhers in understanding the sources, predict the trend of.crosion ... fur an estimaled 20% of total workd soil loss (Dazhong, 1994) About 40% of total soil evaded from the land, or about 2000 tnillion tonnes of soil, is carried to Lhe mouths of the river in China...

Ngày tải lên: 15/06/2025, 19:04

... (Gyll.) and Ophiostoma brunneo-ciliatum (Math.): estimation of the critical thresholds of attack and inoculation densities and effects on hydraulic properties in the stem Natacha Guérarda,b, Erwin ... development of the fungus, have a negative impact on the water conducting ability of the sapwood, and result in impaired hydraulic func-tions of the tree [29] There may be several causes of such ... the area of each type of sapwood, with an image analysis software The fraction of functional sapwood The technique developed by Sperry et al [34] was used to estimate the actual local hydraulic...

Ngày tải lên: 08/08/2014, 14:22

... Biosolids is a beneficial soil amendment, especially for arable soils of inherently low organic matter content, as it may improve many soil properties, such as pH and the contents of organic matter and ... objective of this paper was to quantify the effects of reuse of biosolids (in the form of animal manure) as nutrient sources by: (i) investigating the effects of biosolids application on soil pH, ... biosolids treatment involved application of 7-63 t ha-1 of composted manure or 10-90 t ha-1 of chicken manure incorporated into the top 20 cm of the soil The topsoil bulk density was 1.2 t m-3 for...

Ngày tải lên: 05/03/2014, 16:20

... main groups: (i) analysis of storage properties and (ii) analysis of hydraulic properties Storage properties refer to the soil s ability to absorb and hold water, and these properties include water ... Eds Methods of Soil Analysis, Part 4—Physical Methods, Soil Science Society of America, Madison, WI, pp 463–474 Todoroff, P and Luk, J 2001 Calculation of in situ soil water content profiles from ... than an order of magnitude larger than that of other soil components As a result, the bulk relative dielectric permittivity of soil («ra ) is almost entirely a function of the soil s volumetric...

Ngày tải lên: 12/08/2014, 02:23

... "rule of thumb" for detecting the presence of round off error is the appearance of a large number of zeros at the righthand side of the answers Should the number of zeros depend on parameters of ... column is added to another The determinant of the product of two matrices is the product of the determinants of the two matrices One of the important aspects of the determinant is that it is a single ... measures the degree of rotation (see Figure 1.4) Finally, the gradient of a scalar field is simply a measure of the direction and magnitude of the maximum rate of change of that scalar field...

Ngày tải lên: 20/12/2013, 19:15

... this case, the most disadvantaged in terms of income or education The issue of the effect on health disparities of the movement of individuals slope index of inequality, primarily because the absolute ... in subgroup rates of health, regardless of the number of individuals that may be affected Thus, it is more focused on strict equality of health status measures, regardless of social-group size ... the persistent presence of social-group health disparities, not out of concern for a widening overall distribution of health Yet, a deeper understanding of the overall task of determining variation...

Ngày tải lên: 06/03/2014, 01:20

... newborn care, and malaria However, one of the USAID officials in charge of the courses told us that some health officers were still unaware of the availability of the electronic learning courses ... professional associations of obstetricians, gynecologists, and midwives, and is conducting a global survey on the use of the active management of the third stage of labor 59 Active management of ... USAID officials told us that the majority of PPC’s functions have been transferred to the State Department’s Office of Foreign Assistance, which now oversees the budgetary administration of the...

Ngày tải lên: 28/03/2014, 09:20

... even a majority of instances of a particular cancer Rather, we expect that a number of exposures and characteristics of children each contribute to a proportion of instances of a particular cancer ... understanding the causes of these cancers within populations of children The concept of multiple causation has direct implications for the interpretation of research on the causes of cancer Suppose ... the slope of the line in the above equation is equal to zero The latter hypothesis is tested using the t distribution of m/SEm with the number of degrees of freedom equal to the number of calendar...

Ngày tải lên: 29/03/2014, 01:20

... segments Although there is a trade-off in simplicity of use, the ability of these systems to measure the orientation (due to the effect of gravity) and acceleration of individual segments, as well ... the use of clustering methods for analysis of the feature sets, and discuss the generalization of the proposed approach to building classifiers of motor activities from field data Page of 14 (page ... (4): • Range of autocorrelation function, a measure of the modulation of the signal (unbiased estimate) • Value of the crosscorrelation function at zero lag (for all possible pairs of arm and leg...

Ngày tải lên: 19/06/2014, 10:20

... not reported by any of the four evaluation methods: date of start of the test; method of preparation of stock solutions; the recovery efficiency of the method; the limit of quantification in ... settings of the room or chamber are stated? criteria The OECD guidelines also recommend that date of start of the test; method of preparation of stock solutions, the recovery efficiency of the ... variety of aspects are included: the chosen test system and its applicability domain, consideration of physiochemical properties and stability of test substance, number of replicates, number of concentration...

Ngày tải lên: 21/06/2014, 03:20

... product of independent multinomial distributions Let θ(si , j) = Pθ (si , j) denote the probability of observing nucleotide si at the jth ( j = 1, , l) position of θ, where l is the length of the ... maximum number of nonoverlapping motifs in an N-length sequence As proposed in [12], the prior of the number of motif instances, P(Q = c | Θ, φ), is assumed to be independent of Θ and φ and has ... preference of a TF is the same to all its binding sites, we estimated the binding preference of each TF with the following heuristic Let A denote the set of all known start binding positions of a TF...

Ngày tải lên: 21/06/2014, 08:20