| LARGE
SCALE IRRIGATION |
| REHABILITATION
AND MAINTENANCE
|
| Preliminary
guidelines for the preparation of an asset management plan for
irrigation infrastructure |
|
Output
summary
Full document |
Procedures
for the development of an Asset management plan for irrigation
are described. Each of the steps is supported with background
information, recommendations and examples or illustrations from
the field trials.
IIDS,
1995. Asset management procedures for irrigation schemes - preliminary
guidelines for the preparation of an asset management plan for
irrigation infrastructure. Institute of Irrigation and Development
Studies, University of Southampton, UK. 57pp |
| Management
of weeds in irrigation and drainage channels
|
Output
summary
Full document |
A
set of guidelines covering a selection of appropriate maintenance
practices for different situations. The recomendations for each
control method include detailed procedures, typical outputs, resources
needed (equipment and personnel, training, backup facilities,
capital and operating costs) and potential hazards.
Smout,
IK; Wade, PM; Barker, PJ and Ferguson, CM, 1997. Management of
weeds in irrigation and drainage channels. WEDC Report. ISBN Paperback
0 906055 57 1. 193pp. |
| A
procedure for planning irrigation scheme rehabilitation |
Output
summary
Full document |
A
three-part procedure supports the appraisal of schemes for rehabilitation.
A checklist of potential technical and non-technical constraints
to performance and a farmer questionnaire provide guidance in
identifying factors leading to poor system performance. Condition
assessment procedures are also included to improve objectivity
in assessing physical assets. Elements of the procedure can
also be used to identify maintenance priorities.
Cornish,
G. and Skutsch, J, 1997. A procedure for planning irrigation
scheme rehabilitation. (Supporting software is optional). HR
Wallingford, UK, Report no. OD/TN84. 32pp. |
| Maintaining
the value of irrigation and drainage projects |
Output
summary
Full document |
Lack
of proper maintenance shortens the lifetime of infrastructure
and nullifies assumptions about economic viability. Based on two
projects in Asia the report presents economic analysis that shows
that, in the medium to long term, adequate maintenance has significantly
greater benefit for farmers and nations than the common practice
of "neglect - rehabilitate - neglect".
Skutsch,
J, 1998. Maintaining the value of irrigation and drainage projects.
HR Wallingford, UK. Report no. OD/TN 90. 32pp. |
| Aids
to maintenance: Guidelines for monitoring system condition |
Output
summary
Full document |
Reviews
maintenance planning procedures in the irrigation sector with
examples from Sri Lanka and Mexico. The report then presents a
procedure developed to help identify and prioritise maintenance
needs on irrigation schemes in the developing world.
Cornish,
G. 1998. Improved irrigation system planning and management: Aids
to maintenance, incorporating guidelines for monitoring system
condition. (Supporting software is optional). HR Wallingford,
UK. Report no. OD/TN 94. 29pp. |
|
Sustainable irrigation turnover: Guidelines for irrigation system
maintenance |
|
|
"Part 1: Branch canals" of the guidelines give branch canal Water
User Association (WUA) members practical guidance on how to identify,
prioritise, plan and implement maintenance to ensure the sustainable
operation of their irrigation system.
"Part 2: Main canals" give central WUA members practical guidance
on how main canal maintenance should be carried out on systems
under joint management with Department of Irrigation, to ensure
their sustainable operation.
HR
Wallingford 2003. Sustainable irrigation turnover: Guidelines
for irrigation system maintenance. HR Wallingford, UK. Part 1,
78pp. Part 2, 66pp. |
|
Top Of Page |
| System
Management |
| Guidelines
for irrigation canal control
Vol 1: User manual
Vol 2: The guidelines |
|
Output
summary
Full
document - Vol 1
Full
document - Vol 2 |
The
guidelines describe the principal causes of water wastage and
inefficient water use, and suggest measures which can be adopted
to reduce such wastage and improve performance through better
management, operation, and canal control. For scheme managers,
the Guidelines provide a ready reference, with worked examples
of typical operation scenarios enhancing performance through more
efficient use of the existing control structures and/ or improved
procedures.
Halcrow
Group Ltd., 1998. Guidelines for irrigation canal control: Volumes
1 and 2. Halcrow Group Ltd., Swindon, UK. Vol 1, 132pp. Vol 2,
33pp. |
| Measurement
for irrigation water management |
|
See Multimedia: Videos |
|
| Optimal
allocation of irrigation water supplies |
| See
Software: optALL |
|
|
Sustainable irrigation turnover: Report on system infrastructure
|
|
Full document
|
The report aims to identify issues which affect how irrigation
schemes are maintained after turnover from government to farmers.
It describes findings from a literature review and fieldwork conducted
on four irrigation schemes in Nepal, as well as from working visits
to schemes in Gujarat, India.
Anon
2001. Sustainable irrigation turnover: Report on system infrastructure.
HR Wallingford, UK, Report no. OD/TN 110. 63pp. |
|
Water charging in irrigated agriculture: Lessons from the literature
|
|
Full document
|
This document presents an overview of experiences in irrigation
water charging, as reported in the literature. It will be of value
to policy makers and researchers who formulate or advise on irrigation
policy.
Bosworth,
B; Cornish, G; Perry, C and van Steenbergen, F. 2002. Water charging
in irrigated agriculture: Lessons from the literature. HR Wallingford,
UK, Report no. OD 145. 58pp. |
| Water
charging in irrigated agriculture: Lessons from the field |
| Full
document |
This
report presents the findings of case studies from India, Pakistan,
Nepal, Morocco and Macedonia and provides an analysis of the
role of irrigation charging for cost recovery and demand management
objectives. It is clear that while cost recovery is a widely
held objective, agencies seldom use price to control demand.
The report compliments OD 145 ‘Lessons from the literature’
and is aimed at policy makers and consultants who formulate,
or advise on the formulation of irrigation service charges.
Cornish, G A; Perry, C J . 2003. Water charging
in irrigated agriculture: Lessons from the Field. HR Wallingford,
UK, Report no. OD 150. 104pp. |
| Charging
for Irrigation Services: Guidelines for Practitioners |
| Full
document |
The
guidelines take the user through a logical sequence of steps that
start from the present situation, identify the country’s
objectives for irrigation service charging, compare alternative
approaches to achieving the objective, identify the most effective
way to meet specified objectives, and identify the constraints
that must be addressed (through revised policies, rules, or infrastructure)
to implement the selected ISC system. They include a user checklist
and worked example of the checklist’s application and are
written as a practical guide which should help the user to think
through the issues and reach conclusion appropriate to their own
circumstances. The text avoids setting out prescriptive guidance.
Cornish,
G A; Perry, C J . van Steenbergen F. 2004. Charging for irrigation
services: Guidelines for Practitioners. HR Wallingford, UK, Report
no. OD 153. 62pp. |
|
Top Of Page |
| Sediment
Control |
| The
feasibility of flushing sediment from reservoirs |
Output
summary
Full document |
Methods
to assess the feasibility of flushing sediment from reservoirs
using simple criteria and readily available data are described.
The report describes the processes involved in reservoir flushing
and methods to predict the volume of sediment removed and the
percentage of original storage capacity maintained by periodic
flushing.
Atkinson,
E, 1996. The feasibility of flushing sediment from reservoirs.
HR Wallingford, UK. Report no. OD 137. pp21. |
| Evaluating
the economic benefit of sediment control in irrigation systems |
Output
summary
Full
document |
The
cost of removing sediment can be greatly reduced if sediment control
structures are used to limit the concentration of sediment entering
canal networks. The report describes how to determine the economic
benefits of introducing sediment control structures at schemes
where desilting costs are unacceptably large, or where sedimentation
reduces the areas that can be reliably irrigated. An application
of the procedure on an irrigation system in the Philippines is
described. The information is aimed at system designers and technical
planners.
Chancellor,
F; Lawrence, P and Atkinson, E, 1996. A method for evaluating
the economic benefit of sediment control in irrigation systems.
HR Wallingford, UK. Report no. OD/TN 81. 18pp. |
| A
numerical model for predicting sediment exclusion at intakes |
Output
summary
Full document |
The
PHOENICS 3D modelling software was used to model the performance
of sediment exclusion structures at river off-takes. Validation
using field data demonstrates that the technique has great potential
to improve intake design by accurately predicting the degree of
sediment exclusion provided. The report is aimed at design engineers
familiar with computational fluid dynamics.
Atkinson,
E, 1995. A numerical model for predicting sediment exclusion at
intakes HR Wallingford, UK, Report no. OD 130. 22pp.
|
| Sediment
control slide pack |
| See
Mulitmedia: Slidepacks |
|
| Sediment
monitoring slide pack |
| See
Mulitmedia: Slidepacks |
|
| Sediment
discharge measurement video |
| See
Mulitmedia: Videos |
|
| RESSASS
software |
| See
Software |
|
| SHARC
software |
| See
Software |
|
|
Guidelines for predicting and minimising sedimentation in small
dams |
|
|
Many of the small dams constructed in semi-arid regions of Africa
rapidly fill with sediments, sometimes after only a few years.
When dams silt up the rural communities that rely on them for
cattle watering or small-scale irrigation are deprived of the
water and food security that dams provide, and their livelihoods
are seriously affected.
1. Guidelines for predicting and minimising sedimentation in small
dams. The guidelines present methods for estimating future siltation
rates and water yield reductions in dams subject to siltation.
Predicting soil erosion, sediment yields and dam sedimentation
rates can be a complex task, requiring specialist expertise, and
is generally poorly covered in small dam design manuals. The guidelines
enable dams where siltation rates will be unacceptably large to
be identified and the impact of remedial measure such as catchment
conservation to be quantified. The core procedure is based on
a rapid catchment characterisation exercise that enables catchment
sediment yields to be estimated. Tables are provided to aid the
calculation of future capacity and water yield reductions
2. Excel software supporting the guidelines. The software enable
calculations of future capacity and water yield reduction to be
carried out rapidly. [right click on the link {Software - 2},
select "Save Target As...." and save the file on your PC before
use]
3. Technical note describing the impacts of sedimentation in small
dams on the incomes of poor rural communities.
4. Technical note describing the hydrology and water yield computation
methods used in the guidelines.
5. Technical note describing the development of catchment characterisation
and sediment yield prediction procedure used in the guidelines.
6. Technical note describing methods used to estimate the potential
for catchment conservation, check dams and sediment bypassing
to reduce dam siltation rates used in the guidelines.
HR Wallingford
2004. Guidelines for Predicting and minimising sedimentation in
small dams. HR Wallingford, UK. 64pp. |
|
Top Of Page |
| Drainage
and Salinity |
| Soil
salinity processes under drainwater reuse in the Nile Delta, Egypt |
Output
summary
Full
document |
Increasing
demands on a limited water supply in the Nile Delta have necessitated
the reuse of drainage water for irrigation. Processes of salt
accumulation and movement in working farmers' fields have been
studied in situ. The report presents the results of analysis on
salt leaching and diffusion processes. The information can be
used to develop and improve predictions of salinity build-up under
drainwater reuse in other similar areas.
Abbott,
CL and EL Quosy, DED, 1996. Soil Salinity Processes under Drainwater
Reuse in the Nile Delta, Egypt. HR Wallingford, UK. Report no.
OD 133. 20pp. |
| A
procedure to assess the impacts of drainwater reuse |
Output
summary
Full document |
This
management tool has been developed to aid selection of appropriate
strategies andmanage ment methods for drainwater reuse in irrigated
agricultural areas. It comprises an Assessment Procedure for likely
impacts and for making best planning and management decisions
so that agricultural production is sustainable and maximised,
and negative impacts on soils, crops and the environment are minimised.
The report is intended for non-specialist water resource planners
and managers.
Abbott,
CL and EL Quosy, DED, 1996. A procedure to assess the impacts
of drainwater reuse. HR Wallingford, UK. Report no. OD 134. 75pp.
|
Reclamation
of saline clay soils:
A manual for the horizontal leaching technique |
Output
summary
Full
document |
The
horizontal leaching technique has been developed for the reclamation
of salinised, heavy clay soils. It enables excess salt to be removed
from clay soils that are deep enough (deeper than 1m) and have
low permeability (less than 0.1m/day). Such soils are commonly
found in irrigated plains in arid and semi-arid countries. This
manual provides sufficient technical information to enable implementation
where suitable.
Armstrong,
ASB; Hughes, EJ; Rycroft, DW; Tanton, TW; Pearce, GR and Abbott,
CL, 1996. Reclamation of saline clay soils - A manual for the
Horizontal Leaching Technique. University of Southampton, UK,
in association with HR Wallingford, UK. ISBN: 1 898485 03 8. 65pp. |
| Research
priorities for agricultural drainage in developing countries |
Output
summary
Full document
|
Six
priority areas for drainage research considered to be of primary
importance to improving long-term agricultural output in the developing
world are identified. These are reviewed and priority research
topics highlighted in each area.
Abbott,
CL and Leeds-Harrison, PB, 1998. Research priorities for agricultural
drainage in developing countries. HR Wallingford, UK. Report no.
OD/TN92. 17pp. |
| WASIM
software |
| See
Software |
|
| |
