Your search found 37 records
1 Ahmad, S.; Heermann, D. F. 1989. Irrigation scheduling and water availability at water course command. Irrigation and Drainage Systems, 3(2):193-203.
(Location: IWMI-HQ Call no: PER Record No: H05783)
2 Ahmad, S.; Heermann, D. P. 1990. Computerized scheduling for irrigation management and pumping operations in the watercourse command. Agricultural Water Management, 18(1):1-13.
(Location: IWMI-HQ Call no: PER Record No: H06538)
3 Ahmad, S.; Yasin, M.; Ahmad, M. M. 1991. Flow measurements with portable cut throat flume and broad crested weir in flat gradient channels. Irrigation and Drainage Systems, 5(2):141-150.
(Location: IWMI-HQ Call no: PER Record No: H08853)
4 Ahmad, S.; Kashyap, D.; Mathur, B. S. 1991. Numerical modeling of two dimensional transient flow to ditches. Journal of Irrigation and Drainage Engineering, 117(6):839-869.
(Location: IWMI-HQ Call no: PER Record No: H09484)
5 Ahmad, S.; Kashyap, D.; Mathur, B. S. 1993. Mathematical modeling of saturated-unsaturated flow to drains. Irrigation and Drainage Engineering, 119(1):18-33.
(Location: IWMI-HQ Call no: PER Record No: H012115)
6 Ahmad, S.; Heermann, D. F. 1992. Management strategies for scheduling irrigation: Wheat and corn. ICID Bulletin, 41(2):111-126.
(Location: IWMI-HQ Call no: PER Record No: H012573)
7 Yasin, M.; Ahmad, S.; Ahmad, M. M.; Bhatti, A. A. 1993. Innovative surface irrigation methods for fruit orchards. In Government of Pakistan-USAID Irrigation Systems Management Research Project; IIMI, Proceedings: Irrigation Systems Management Research Symposium, Lahore, 11-13 April 1993. Vol.VII. - Improving on-farm water use and application. pp.1-8.
Surface irrigation ; Horticulture ; Border irrigation ; Irrigation requirements / Pakistan / Balochistan
(Location: IWMI-HQ Call no: IIMI 631.7.8 G730 IIMI Record No: H012909)
Surface irrigation methods such as borders, round basins, modified round basins and modified furrows were evaluated for the peach orchard at the Water Resources Research Institute Field Station, NARC, Islamabad. The three methods with slope of 0.75% were compared in terms of savings in irrigation water and duration of irrigation against borders with slope of 0.43%. Compared to borders, savings in water application of 486%, 260% and 464% were observed in round basins, modified round basins and modified furrows, respectively. A similar trend was observed in the duration of irrigation. Distribution uniformity was estimated using minimum and average depth of water infiltrated. Distribution uniformity of 59.2%, 81.3%, 92.3% and 76.6%, was observed for round basins, modified round basins, modified furrows and borders, respectively. Therefore, modified furrows can be used to achieve higher uniformity and five times more area can be irrigated for deciduous orchards. This system also provides an opportunity to have better orchard management where transmission of soil borne diseases is much lower compared to other methods. This method was designed where wetted areas is more or less the same as trickle irrigation except the main furrow line. Thus this system is suitable for areas like Balochistan where water is at premium.
8 Bhatti, A. A.; Ahmad, M. M.; Moshabbir, P. M.; Ahmad, S.. 1993. Benefits of supplemental irrigation for wheat in Barani environment. In Government of Pakistan-USAID Irrigation Systems Management Research Project; IIMI, Proceedings: Irrigation Systems Management Research Symposium, Lahore, 11-13 April 1993. Vol.VII. - Improving on-farm water use and application. pp.45-54.
Supplementary irrigation ; Irrigation effects ; Wheat ; Crop yield ; Sprinkler irrigation / Pakistan
(Location: IWMI-HQ Call no: IIMI 631.7.8 G730 IIMI Record No: H012912)
A field experiment was conducted to evaluate the benefits of supplemental irrigation for wheat crop under Barani environment. Three irrigation treatments, namely 10 mm at Rauni, 10 mm at 50% MAD, and 25 mm at 75% MAD, were employed. The experiment was conducted at the Water Resources Research Institute, Field Station, National Agricultural Research Centre, Islamabad using raingun sprinklers for supplemental irrigation. The wheat crop yield with supplemental irrigation was compared with Barani crop yield, and a considerable increase in yield of 45% and 117% was observed during 1990-91 and 1991-92 wheat growing seasons at Islamabad, where seasonal rainfall of 523 mm and 354 mm was received, respectively. The seasonal rainfall was in excess or sufficient to meet seasonal crop evapotranspiration requirement but was not well spread during the growing season. The highest net benefits from supplemental irrigation were Rs.6,583 and Rs.9,651 per hectare during 1990-91 and 1991-92 wheat growing seasons, respectively. The benefits from supplemental irrigation are expected to increase in dry years and/or in dry regions. However, the three years of experimentation revealed that even in sub-humid to humid regions, and during wet years, considerable increase in farm net return can be achieved through supplemental irrigation.
9 Ahmad, S.; Moshabbir, P. M.; Bhatti, A. A.; Yasin, M. 1993. Design and local manufacturing of raingun sprinkler irrigation systems. In Government of Pakistan-USAID Irrigation Systems Management Research Project; IIMI, Proceedings: Irrigation Systems Management Research Symposium, Lahore, 11-13 April 1993. Vol.VII. - Improving on-farm water use and application. pp.55-78.
(Location: IWMI-HQ Call no: IIMI 631.7.8 G730 IIMI Record No: H012913)
This paper describes the feasibility of sprinkler irrigation systems in Pakistan and indicates potential areas of development along with the present state of introduction. The four rainguns selected for local manufacture (indigenization) and manufacturers' specifications are presented. These can be used to design sprinkler systems for farms 2 acres to 15 acres. Similarly, high pressure centrifugal pumps of 2 lps, 4 lps, 6 lps and 8 lps capacity were designed and indigenized in collaboration with MECO Pvt., Lahore. This company now manufactures pumping systems for any configuration of pressure and discharge. The pumping systems are available with electric motor or diesel engine. The estimated installed cost of portable raingun sprinkler systems in Pakistan ranges from Rs.5000 to Rs.6000 per acre for a system of at least 10 acres using diesel-operated pumping system. The cost of electric-operated system is in the range of Rs.3000-Rs.4000 per acre for a system of five acres or more. These systems are simple in operation and all the spare parts are available locally. Low density polyethylene black carbon pipes with UV stabilizers were also developed for 25 mm, 50 mm, 76 mm and 102 mm diameters which can be used for delivery and suction purposes.
10 Moshabbir, P. M.; Ahmad, S.; Yasin, M.; Ahmad, M. M. 1993. Indigenization of trickle irrigation technology. In Government of Pakistan-USAID Irrigation Systems Management Research Project; IIMI, Proceedings: Irrigation Systems Management Research Symposium, Lahore, 11-13 April 1993. Vol.VII. - Improving on-farm water use and application. pp.79-89.
(Location: IWMI-HQ Call no: IIMI 631.7.8 G730 IIMI Record No: H012914)
During the 1980s many research and developmental organizations exerted efforts to introduce trickle irrigation systems in the country. All these efforts were based on the use of imported materials and were unsuccessful due to higher installation costs and lack of services and skills. PARC was entrusted to promote trickle irrigation technology in the country and to analyze the problems related to the successful introduction of this technology. This resulted in the process of indigenization of trickle irrigation systems in the country using local skills, technology and materials. Accordingly, PARC established the National Irrigation Systems Testing Laboratories of the Water Resources Research Institute, NARC, for research, evaluation and testing of trickle irrigation systems and indigenization. In collaboration with the Plastics Technology Centre (PTC), Karachi and GRIFFON Industrial Corporation, Lahore, PARC successfully completed the indigenization process and commercial production has been initiated. Now the appropriate technology, skills and services are available which will be used in the future for large scale adoption of trickle irrigation in the country. The estimated cost of a standard trickle irrigation system is Rs.9000/acre based on the Ex. Factory price.
11 Ahmad, S.. 1993. Irrigation management research agenda: View from PARC. In Government of Pakistan-USAID Irrigation Systems Management Research Project; IIMI, Proceedings: Irrigation Systems Management Research Symposium, Lahore, 11-13 April 1993. Vol.IX. - Symposium highlights and ISM research agenda for the future. pp.53-56.
(Location: IWMI-HQ Call no: IIMI 631.7.8 G730 IIMI Record No: H012924)
12 Ahmad, S.. 1994. Irrigation and water management in the Indus Basin of Pakistan: A country report. In JICA; FAO. RAPA, Irrigation performance and evaluation for sustainable agricultural development: Report of The Expert Consultation of the Asian Network on Irrigation/Water Management, Bangkok, Thailand, 16-20 May 1994. Bangkok, Thailand: FAO. RAPA. pp.190-211.
Irrigation management ; Water management ; Land classification ; River basin development ; Salinity ; Water table ; Rain ; Performance evaluation ; Technology transfer ; Non-governmental organizations ; Rural development / Pakistan / Indus River
(Location: IWMI-HQ Call no: 631.7.8 G570 JIC Record No: H015213)
13 Ahmad, S.; Aslam, M.; Shafiq, M. 1996. Reducing water seepage from earthen ponds. Agricultural Water Management, 30(1):69-76.
(Location: IWMI-HQ Call no: PER Record No: H018460)
14 Yasin, M.; Ahmad, S.. 1997. Modernization of irrigation schemes in Pakistan. In FAO. RAP, Modernization of irrigation schemes: Past experiences and future options: Proceedings of the Expert Consultation, Bangkok, 26-29 November 1996. Bangkok, Thailand: FAO. RAP. pp.205-219. (Water report 12 / RAP publication 1997/22)
Modernization ; Irrigation systems ; Irrigation programs ; Irrigation operation ; Irrigation management ; Water resources ; Rain ; Surface water ; Groundwater ; Water budget ; Land use ; Water use ; River basins ; History ; Salinity control ; Subsurface drainage ; Water quality ; Participatory management ; Farmer participation ; Water user associations / Pakistan / Indus Basin
(Location: IWMI-HQ Call no: 631.7.7 G000 FAO Record No: H020090)
15 Piracha, A. L.; Ginn-Yein, C.; Ahmad, S.. 1998. Integrated use of GIS and remote sensing in hydrological modeling. In Morishita, H.; Piracha, A. L. (Eds.), Conference proceedings - GIS applications to Resource Management and Environmental Planning, Rawalpindi/ Islamabad, Pakistan, 17-18 February, 1998. Islamabad, Pakistan: Pakistan Society of Geographic Information Systems (PSGIS) pp.33-38.
GIS ; Remote sensing ; Hydrology ; Simulation models ; Watersheds ; Runoff / Taiwan / Chi-Lung River
(Location: IWMI-HQ Call no: 006 G730 MOR Record No: H023673)
16 Ahmad, S.; Ahmed, J. 1999. The impact of the Mangla Watershed Management Project, Pakistan. In Hinchcliff, F.; Thompson, J.; Pretty, J.; Guijt, I.; Shah, P. (Eds.). Fertile ground: The impacts of participatory watershed management. London, UK: IT Publications. pp.332-339.
Watershed management ; Social participation ; Reservoirs ; Dams ; Catchment areas ; Sedimentation / Pakistan / Mangla Watershed Management Project / Jhelum River
(Location: IWMI-HQ Call no: 333.91 G000 HIN Record No: H024872)
17 Ahmad, S.; Ahmad, M. M.; Yasin, M.; Akbar, G.; Khan, Z. 2000. Assessment of shallow groundwater quality case study of Mona SCARP. In GWP; Pakistan Water Partnership, Proceedings of Regional Groundwater Management Seminar, October 9-11, 2000, Islamabad. pp.17-25.
Water quality ; Assessment ; Groundwater ; Case studies ; Shallow tube wells ; Pumping ; Villages ; Farmer participation ; Irrigation management ; Participatory management ; Participatory rural appraisal ; Water availability ; Water table ; Manual pumps / Pakistan / Indus Basin / Mona
(Location: IWMI-HQ Call no: 631.7.6.3 G730 GWP Record No: H026914)
18 Ahmad, S.; Aslam, M.; Zeb, J. 2000. EM bio-generator for amending sodic groundwater. In Water and Power Development Authority (WAPDA); Mehran University of Engineering and Technology (MUET); International Waterlogging and Salinity Research Institute (IWASRI); International Irrigation Management Institute (IIMI). Proceedings, National Seminar on Drainage in Pakistan, Jamshoro, Pakistan, 16-18 August 2000. [Vol. 1] Lahore, Pakistan: Water and Power Development Authority (WAPDA); Sindh, Pakistan: Mehran University of Engineering and Technology (MUET); Lahore, Pakistan: International Waterlogging and Salinity Research Institute (IWASRI); Lahore, Pakistan: International Irrigation Management Institute (IIMI). pp.191-200.
Groundwater ; Salinity ; Water quality ; Leaching ; Waterlogging ; Water availability ; Soil management ; Irrigated farming ; Engineering ; Technology / Pakistan / Indus Basin
(Location: IWMI-HQ Call no: IIMI 631.62 G730 IIM Record No: H027131)
19 Ahmad, S.; ul Mulk, S.; Muhammad, A. 2002. Groundwater management in Pakistan. In Pakistan Water Partnership. Papers presented by Pakistani delegation in First South Asia Water Forum, Kathmandu, Nepal, 26-28 February 2002. pp.1-19.
Groundwater management ; Groundwater development ; Aquifers ; Tube wells ; Irrigation water ; Domestic water ; Water supply ; Sanitation ; Salinity ; Water quality ; Water pollution / Pakistan / Indus Basin
(Location: IWMI-HQ Call no: 333.91 G730 PAK Record No: H034097)
20 Ahmad, S.; Khan, A.; Salpas, P. 2003. Development of a fractured medium flow model for a waste site. Journal of the American Water Resources Association, 39(5):1127-1142.
(Location: IWMI-HQ Call no: PER Record No: H034877)
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