(A) Drainage subjects
1. Agricultural drainage
criteria
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This is a book chapter dealing with drainage
systems, effects on agriculture,
design criteria, water balances (budgets),
drainage requirements, and examples in various
agro-climatic zones.
The table of contents
may be viewed here.
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2. Data analysis in
drainage research
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This is a lecture note with examples of
application of four software packages
on this web site (CumFreq, SegReg, EnDrain and
RainOff) and other analysis topics.
View
table of contents
here.
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3. Energy balance of
groundwater flow
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This is copy of an article published earlier.
It gives physical theory of groundwater
hydraulics.
View abstract.
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4. Application of the
energy balance of groundwater flow to
ditch drains.
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This is an article giving the mathematical
theory and examples of groundwater movement
and seepage used in the EnDrain program (see
Software on this website).
(view abstract)
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Waterlogging and salinity due to irrigation
in the wheatbelt
of W. Australia
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A pumping station in The Netherlands to
drain excess water from a polder.
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5. Well spacing
equations for subsurface drainage of
agricultural land by pumped wells
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This paper can be used as a manual of the
WellDrain program (see the
software page).
For information on well pumping tests for
aquifer properties visit the same page.
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6. Determining hydraulic
conductivity of soils
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This is a book chapter dealing with the
determination of the saturated
hydraulic conductivity or permeability of
soils using small and large scale methods
The
table of contents
may be viewed here.
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7. Agricultural land
drainage a wider application through
caution and restraint
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From: Annual Report 1991, p. 9 - 21. ILRI,
Wageningen, The Netherlands
This article emphasizes environmentally wise
use.
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8. Rainfall-runoff
relations of a small valley
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This is an article on the use of the
RainOff model for
the rainfall-runoff relations in a small
valley in Sierra Leone published in the
International Journal of Environmental
Science.
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9. Subsurface drainage
equations using the full energy balance
of
groundwater flow in
layered and/or anisotropic soils.
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This is an article on the use of the steady
state
EnDrain model
for subsurface land drainage published in
the International Journal of Research in
Agriculture and Forestry. For comparison
an article on both steady and non-steady
state drainage, using both
EnDrain and
RainOff can be
read
over here
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10. The study of effects
of drainage on agriculture.
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This is an article on the analysis as given
in the title. In: Land Reclamation and Water
Management, p. 160 - 170. Publ.27,
International Institute for Land Reclamation
and Improvement (ILRI), Wageningen, The
Netherlands.
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11. Agricultural Criteria
for Subsurface Drainage: a Systems
Analysis.
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This is an article on the drainage criteria and
design standards. Published in the journal:
Agricultural Water Management, 14 (1988),
79-90.
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(B) Salinity modelling
12. SaltMod manual
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This manual gives a description of the Saltmod
model (see software
page) for the leaching (flushing) of saline
(salt affected) soils, including its principles,
user menu, and case studies.
See table of contents
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13.
SaltMod application
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This is a proceedings paper called: "SaltMod, a
tool for the interweaving of irrigation and
drainage for soil salinity control".
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14. SahysMod manual
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This manual gives a description of the SahysMod
model (see software
page) including its principles, user menu,
and case studies
SahysMod is a combination
of Saltmod and a mathematical (numerical)
groundwater model simulating flow and salinity
in confined, unconfined and semiconfined
(leaky)aquifers.
See
table of contents
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15. LeachMod application
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LeachMod is designed to compute the soil
salinity in experimental fields allowing time
steps of 1 day to 1 month and using the
leaching efficiency as an important soil
parameter. An article on this subject appeared
in the International Journal of Environmental
Science dealing with the reclamation of saline
heavy clay soils. The paper van be viewed with
this link.
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(C) Irrigation subjects
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Water is scarce for Baluch nomads due to
irrigation developments
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(D) Statistical subjects
19. Frequency
analysis in hydrology
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This is a book chapter dealing with the
cumulative frequency analysis of hydrologic
phenomena including log-normal (lognormal) and
Gumbel distributions giving confidence belts
and discussing return periods (recurrence
intervals).
The
table of contents
may be viewed here.
An article on the use of the binomial
distribution for the determination of
confidence
intervals and belts for cumulative probability
distributions can be downloaded from
this place,
while a summary of it can be found
over here
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20. Regression
analysis for water table, soil salinity
plant growth and crop production
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This is a book chapter dealing with the
principles of linear regression analysis
(least squares method) including confidence
statements and segmented regression using
a breakpoint.
The table of contents
may be viewed here.
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21. Crop tolerance
to soil salinity, statistical analysis
of data measured in farm lands.
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This is an article published in the
International Journal of Agricultural Science
in which 8 crops in three tropical countries
(Egypt, India and Pakistan) are studied.
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22.
Crop tolerance to shallow water tables, statistical
analysis of data measured in farm lands.
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This is an article published in the
International Journal of Agricultural Science
in which 4 crops in 4 tropical countries
(Australia, Egypt, England, and Surinam)
are studied.
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23. Generalized and
composite probability distributions
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This is an article published in the
International Journal of Mathematical and
Computational Methods in which the
CumFreq
and CumFreqA models are used.
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24. The versatilty of the generalized
logistic probability
distribution
demonstrated with examples
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This is an article entered in the
ResearchGate website in which the usefulness
of this distribution that can be symmetrical,
skew to the left, or skew to the right
depending on the exponent to which the data
values are raised.
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25. Methods to evaluate crop salt tolerance from
field trials, a critical review of the
Salt Farm Texel article. See:
crop tolerance to soil salinity
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The Salt Farm Texel has published a paper in the
journal "Agricultural water management", written
by G. van Straten et al. and entitled: "An
improved methodology to evaluate crop salt
tolerance from field trials", on line:
Salt Farm Texel.
This article employs the Maas-Hoffman and van
Genuchten models which actually are both not
applicabe to the data sets given. The van
Genuchten model is unjustifiably recommended.
The paper contains too may flaws to be useful
while an improved methodology, mentioned in the
title, is not to be found.
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26.The field trials in the Salt Farm Texel,
The Netherlands, to find the tolerance of
potato to soil salinity yield yearly different
results.See:
potato yield and soil salinity
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For viewing and downloading click on any of the 26
blue titles above you wish to select.
More articles can be found on the
reports & cases page.
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Water and land,
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soil and plant
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Mexican sunflower
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White daisy
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Cornflower
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Primrose
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