The Influence Of Priming Two Cucumber Cultivar Seeds

J. Duhok Univ. Vol.13, No.1, (Agri. And Vet. Sciences) Pp 82-89, 2010
during prolonged dry period, also the mountains
which surrounding Duhok Dam, shown early
landslide and continuous erosion.
The differences of water turbidity in the
rainfall season is very important for calculation
the expected actual soil loss due to the effect of
rainfall drop, For example in the spring when the
soil is newly ploughed and without any cover
will be dangerous if the area is expected to the
high spring shower high value of erosion and
then high amount of suspended soil and turbid
water which in turn causes large quantity of
sediments in the rivers and its lateral, but less
effect if the spring rain be gentle. This
measurement generally provides a very good
correlation with the concentration of particles in
the water, which affect turbidity then increase
the erosion .
22
RECOMMENDATIONS
Depending on the output of this study we
can know which period of the season is critical
for soil erosion which shown as turbidity water
in the river. On this basis there should be plans
for soil conservation works to stop the impact of
the raindrop on uncover soil surface and we
recommended the following points for decrease
the cause of suspension and natural water
erosion.
1- Reforestation the uncovered parts of the
watershed and to prevent the present forest also
forbidden to cut the forest trees.
2- construct and develop the small check dams
which traditionally named small stone dam on
the laterals of the streams and gullies to reduce
the flowing runoff and then decrease the gullies
erosion, which dominate in the region.
3- Make retaining wall on both roadsides to
reduce collapse and
lubrication posses in the soil.
4- Construct wattle fence and develop new
durable material on critical slope which have
fragile and uncovered soil to conserve it from
the erosion.
REFERENCES
- Aomer, O.A. (1999).Morphological study for some
watershed discharge Arbil, Iraq Kurdistan Duhok
University bulletin, The first minutes scientific
congress ,V2 No, 4 P591.
- Armstrong G.L., and D.H. Mackenzie (2002) .Sediment
yield and turbidity records from small upland sub
catchments in the Warragamba Dam catchments.
New South Wales, Australian Journal of Soil
Research V40.
- Dabney, S.M., M.A. Locke and Jr, R.W. Steinriede
(2006). Turbidity sensors track sediment
concentrations in runoff from agricultural fields,
federal interagency sedimentation conference
proceedings, Reno, Nevada. CDROM.
- Duhok Dam project consultants, (1979). Department of
Dams and reservoirs first stage. Project report
Vol.1, Baghdad Iraq. Ministry of irrigation.
- Dutrai, G.V. (1999).In-situ light scattering measurements
of Cryptosporidium and other suspended particles
in water.
- Gulcur, M., and M.S.Kettaneh (1972).Development plan
of Duhok watershed, forestry research,
demonstration and training .Fo.SF/TRQ.518 Arbil.
- Hammed, M.T. (1980).Study on the relationship between
rainfall and each of the discharge and suspended
load of Duhok watershed. A thesis of Master degree
submitted to the college of Agriculture and
Forestry, Mosul University, Iraq
- Hammed, M.T. (2004) .Morphological study on the
secondary laterals of the Duhok river watershed
.Journal of Duhok university .V7. Number 2 P.
(63-75).
- Hollidy,C.p.,T.C.Rasmussen and P.M.William
(2003).Establishing the relationship between
turbidity and total suspended sediment
concentraton.The University of Georgia,
Athens,GA30602.
- Howard, P (2008).U.S. Department of the Interior.U.S.
Geological survey.
URL:http://ga.water.usgs.gov/edu/characteristics.
html
- Hubert, C., M. Takeuchi and M. Trevethan (2007).
Available online. Using turbidity and acoustic
backscatter intensity as surrogate measure of
suspended sediment concentration in a small
subtropical estuary. Journal of environment, P1406-
1416, Austral. www .Elsevier .com/locate/jenvman
- Jamie,B., and R. Balance.(1996).Water quality
monitoring- a practical guide to the design and
implementation of freshwater .Quality studies and
monitoring programmer ,UNEP/WHO.
- Lewis, J. (1996).Turbidity controlled suspended sediment
sampling for runoff event load estimation, Water
Resources Research, 32(7), 2299-2310.
- Rasmussen, T.C. (1995).Erosion and sedimentation
scientific and regulatory issues .Report developed
by Georgia board of regent's scientific panel on
evaluating the erosion measurement standard
defined by the Georgia erosion sedimentation Act.
- Wijenayake, N.A.J., and P.M.K. Alahakoon (2002).
Development accost-effective turbid-meter
,Department of agricultural engineering, faculty
of Agriculture, University of Peradeniya 20400,
Sri Lanka.