The aim of this research is to predict the quantities of soil lost by the water erosion in the
Al-Hawiz Dam basin area using GIS and RUSL. R factor was calculated through
matimatical equation after collecting rain data during 2008-2017 from weather
station at
Basel-Al-Assad airport .k value of each soil sampl was calculated after determination of
txture,structure,saturated hydrolic conductivity, and organic matter).a map were prepared
showed local distribution of k values .slop factor was determined as well as using DEM for
studied region, and slop map was introduced in mathematical equation through a GIS to
obtain LS map .NDV used for studied region to calculate C map.To obtain predictive map
of soil lost quantitis ,maps of LS,C,K was multiplicated with R value.
The results showed that R value in studied region 342.78 ,while k factor value was
0.7-0.28.soil with low value concentrated at medium part of studied region,whil slop
factor value was between 0 and 38.87.C factor value was 0.29 at west part and 0.98 at east
part .prediction map of lost quantites was classified in to 4 degrees according erosion risk (
very low risk ,low,medium,high .The results of soil lost quantities were classified in to 4
classes in studied region : very low( 0-5) t/h/year,low( 5-12 ) t/h/year and medium ( 12-24
t/h/year and severe in which soil loss exceeded 24 t/h/year
The research was performed by isolating some species of soil- fungi from agricultural soils
handling with different pesticides and fungicides. Where the following fungi were isolated:
Aspergillus niger (The isolates A1 and A2), Fusarium oxysporum (
The isolate F),
Trichoderma harzianum (The isolate T). Also F. solani (The isolate F7) and T. viride (The
isolate T.v) were used, whereas they were taken from high studies laboratory- Science
Faculty- Tishreen University at a previous search.
The research was conducted to assay the ability of the previous fungi to degradation a
number of pesticides, the insecticide "Dolan", the insecticide "Plantocide", the nematicide
"Vydate" and the fungicide "Bayfidan", through the effect of double dose of each
pesticides in the biomass of the studied fungi on PDB medium. In addition to analysis the
results residues of pesticides using Spectrophotometer, and evaluation the pH values.
In this research an experimental study has been carried out
to investigate the enhancement of Bosra Alsham´s soil (120 km
south Damascus) by using crushed glass wastes additives by using
experimental approach. The soil samples were taken from Bosr
a
(2m underground surface), which is classified as highly plastic
clayey soil CH according to unified classification.
This research was conducted in 2016c, at the Zahid Western
Research Station in Akkar Plain region of Tartous Governorate, the
objective of this research is study the effect of non-conventional
organic waste (compost of garbage, sewage sludge) and
cow
manure on the physical properties of clay soil in the region. Wastes
was added to the soil at a rate of (0 - 10 - 20 – 30) t/ha, in order to
determine the effect of the difference in the quantity added on
physical properties of the soil and peanut productivity.
In this research, measurement of radioactivity of bismuth-212 in the soil of the
village of the Ien Lailonin- Alhafah area- Latakia city using gamma spectrometry to make
sure the radioactive content to soil, and was measuring the radioactivity of b
ismuth-212
using the alpha spectroscopy, after digestion 10g of soil using nitric acid and sulfuric acid
concentrated, and then spontaneaous deposition into high purity a silver disc.
the results show that: the radioactivity of bismuth-212 (1,48Bq) using gamma
spectrometry and (2,05Bq)using the alpha spectroscopy It is within the range allowed
international border ,taking into account the errors in measurements.
The experiment carried out to improve the efficiency of drip
irrigation system , based on soil moisture. The indirect measure of
humidity Was used in the experiment, connected with the pointing
device (separator continued), and a control device pr
ogrammed on a
low humidity degree, which is degree the field capacity of the soil and
which value is 25%, and on a high moisture degree which is saturation degree
at 75%..
The ways cultivation of soils and preparing of soil are for farming
field crops with adding fertilizers village as one of the most important
methods of modern agriculture processes.
Starting up off this importance. the research was executed in the
north east area of Homs city, through the season(2013,2014) by
using five ways to cultiveate the soil.
The purpose of this research is to apply a mathematical program to
calculate water and chemical balance in unsaturated soils, under the
influence of different methods of irrigation, in order to monitor the
amount of vertical drainage of water insi
de the soil and choose a
irrigation method that can reduce the phenomenon of groundwater
pollution.
Three irrigation methods were tested with different fertilization
method. The study was conducted in the western part of Homs
Governorate (AlQusair orchards).
This paper presents and analyses the results of 2D and
3D numerical simulation conducted for the performance prediction
of TBM tunneling in clay soil.
This research was carried out during 2014 - 2015. The research aimd to describe
some chemical characteristics of the river's water used for irrigation, chemically compare it
with the Syrian Standards Specifications in terms of salt quantity and qua
lity and Cd and B
concentrations, water samples were taken from four observation points along the river:
A (domestic), B (industrial), C (mixed) and D (estuary), also Soil samples from the river
edges were also analyzed. The findings revealed that the EC value in B was 0.61 mg/l i.e.
less than those of others, with significant difference 0.72, 0.74, 0.73 mg/l, respectively.
The study also showed a significant increase in B and C concentration by 0.48 and 0.49
mg/l, respectively, compared with A and D by 0.4 mg/l each. A significant increase in Cd
concentration was noticed for B, C and D by 0.73, 0.88 and 0.75 mg/l vs. A 0.67 mg/l.
However, Cd concentration in the river water in all seasons and sites was excessive and
higher than the permissible limit for water discharge into seas estimated at 0.05 mg/l,
whereas the other parameters were lower than the permissible limits according to the
Syrian Standards. The effect of water pollution on soil showed a significant increase in EC
for B by 1.01 dS/m than others. The increase was also more significant in subsurface layer
than surface one by 0.45 and 0.62 dS/m, respectively. In addition, the findings
demonstrated a significant increase in Cd for C (2.67 mg/kg) than other points. The
increase in Cd concentration was more significant in the surface layer (2.648 mg/kg) than
the subsurface one (2.631 mg/kg), and this concentration was lower than the normal range
of soil content from Cd (3 ppm).
