Your search found 21 records
1 Feddes, R. A.. 1988. Effects of drainage on crops and farm management. Agricultural Water Management, 14(1-4):3-18.
(Location: IWMI-HQ Call no: PER Record No: H05216)
2 Kabat, P.; van den Broek, B. J.; Feddes, R. A.. 1992. SWACROP: A water management and crop production simulation model. ICID Bulletin, 41(2):61-84.
(Location: IWMI-HQ Call no: PER Record No: H012570)
3 Aoda, T.; Van Dam, J. C.; Feddes, R. A.; Yoshida, S. 1993. The methodology for the simulation of water storage and crop production. In Tingsanchali, T. (Ed.), Proceedings of the International Conference on Environmentally Sound Water Resources Utilization, Bangkok, Thailand, 8-11 November 1993. Vol.2. Bangkok, Thailand: AIT. pp.III-51-58.
(Location: IWMI-HQ Call no: 333.91 G000 TIN Record No: H015822)
4 Groen, K. P.; Feddes, R. A.; Boesten, J. J. T. I.; Schultz, B.; Koopmans, R.; van Dam J. C. 1996. Emission of solutes in cracked clay soils. In Ragab, R.; El-Quosy, D. E. D.; van den Broek, B.; Pereira, L. S. (Eds.), Crop-water-environment models: Selected papers to the workshop organized by the ICID Working Group on "Sustainable Crops and Water Use" at the occasion of the 16th Congress of the International Commission on Irrigation and Drainage at Cairo, Egypt. Cairo, Egypt: ICID. Egypt National Committee. pp.29-41.
Simulation models ; Computer models ; Calibrations ; Leaching ; Clay soils ; Soil properties ; Soil water ; Rain
(Location: IWMI-HQ Call no: 631.7.1 G000 RAG Record No: H019363)
5 Smets, S. M. P.; Kuper, M.; Van Dam, J. C.; Feddes, R. A.. 1997. Salinization and crop transpiration of irrigated fields in Pakistan's Punjab. Agricultural Water Management, 35(1/2):43-60.
Irrigation effects ; Soil salinity ; Cotton ; Wheat ; Soil texture ; Water quality ; Irrigation water ; Models ; Sandy soils ; Performance indexes ; Sensitivity analysis / Pakistan / Punjab
(Location: IWMI-HQ Call no: PER Record No: H021837)
(1.28 MB)
6 Kim, C. P.; Stricker, J. N. M.; Feddes, R. A.. 1998. Impact of soil heterogeneity on the water budget of the unsaturated zone. Water Resources Journal, 196:64-74.
(Location: IWMI-HQ Call no: PER Record No: H022598)
7 van Dam, J. C.; Huygen, J.; Wesseling, J. G.; Feddes, R. A.; Kabat, P.; van Walsum, P. E. V.; Groenendijk, P.; van Diepen, C. A. 1997. Theory of SWAP version 2.0: Simulation of water flow, solute transport and plant growth in the soil-water-atmosphere-plant environment. Wageningen, The Netherlands: Wageningen Agricultural University; DLO Winand Staring Centre. 167p. (Department of Water Resources, Wageningen Agricultural University report 71 / DLO Winand Staring Centre technical document 45)
Water management ; Plant growth ; Soil-water-plant relationships ; Simulation models ; Mathematical models ; Flow discharge ; Hydraulics ; Measurement ; Soil water ; Clay soils ; Evapotranspiration ; Evaporation ; Rain ; Irrigation scheduling ; Drainage ; Surface water
(Location: IWMI-HQ Call no: 631.7.1 G000 VAN Record No: H023132)
8 Feddes, R. A.; Koopmans, R. W. R.; van Dam, J. C. 1997. Agrohydrology. Wageningen, Netherlands: Wageningen University. Department of Environmental Sciences. Sub-department Water Resources. v.p.
Water potential ; Hydrology ; Soil water movement ; Soil-water-plant relationships ; Evapotranspiration ; Precipitation ; Water requirements ; Plant growth ; Mathematical models ; Simulation models ; Computer models ; Irrigation ; Drainage ; Design ; Crop yield ; Drought ; Groundwater ; Water table ; Ecosystems ; Clay soils / Netherlands / Pakistan / Punjab
(Location: IWMI-HQ Call no: 631.7.2 G916 FED Record No: H024033)
9 Bastiaanssen, W. G. M.; Menenti, M.; Feddes, R. A.; Holtslag, A. A. M. 1998. A remote sensing surface energy balance algorithm for land (SEBAL): 1. Formulation. Journal of Hydrology, 212-213:198-212.
(Location: IWMI-HQ Call no: e-copy only Record No: H024215)
(0.54 MB)
10 Sarwar, A.; Feddes, R. A.. 2000. Evaluating drainage design parameters for the Fourth Drainage Project, Pakistan by using SWAP model: Part II - modeling results. Irrigation and Drainage Systems, 14(4):281-299.
Drainage ; Design criteria ; Evaluation ; Simulation models ; Crop yield ; Soil salinity ; Plant growth ; Water table ; Economic analysis ; Irrigation scheduling ; Wheat ; Cotton ; Sugarcane ; Soil properties / Pakistan / Punjab Province / Sindh Province
(Location: IWMI-HQ Call no: PER, IWMI 631.7.1 G730 SAR Record No: H027452)
11 Ahmad, Mobin-ud -Din; Bastiaanssen, W. G. M.; Feddes, R. A.. 2002. Sustainable use of groundwater for irrigation: a numerical analysis of the subsoil water fluxes. Irrigation and Drainage, 51(3):227-241.
Groundwater irrigation ; Aquifers ; Recharge ; Soil moisture ; Water balance ; Simulation models / Pakistan
(Location: IWMI HQ Call no: PER, IWMI 631.7.1 G730 MOB Record No: H030327)
The food-producing regions of the world increasingly rely on irrigation from groundwater resources. Further increases of groundwater use can adversely affect the sustainability of irrigated agriculture and put food security at risk. Sustainability of irrigation at field scale with groundwater is obtained if groundwater recharge is in equilibrium with tubewell extractions and capillary rise. Traditional information on phreatic surface behaviour does not explain the processes causing a phreatic surface to decline or incline. In this study, the physically based numerical model Soil–Water–Atmosphere–Plant (SWAP) was applied to compute soil moisture content and vertical soil water luxes in the unsaturated zone for the cotton–wheat and rice–wheat cropping system of Punjab, Pakistan. SWAP has been calibrated and verified with in situ measurements of soil moisture content and evapotranspiration fluxes measured by means of the Bowen ratio surface energy balance technique. Accurate data of the soil hydraulic properties are critical for the calibration of the soil moisture distribution. With knowledge of the van Genuchten–Mualem parameters available, SWAP could be applied to assess recharge and capillary rise for most field conditions, including basin irrigation. The results under Pakistani conditions show that deep percolation cannot always be estimated from root zone water balances. An annual recharge of 23.3 cm was computed for the cotton–wheat area. sustainability of irrigation with groundwater is obtained if a reduction in irrigation with groundwater by 36% is obtained. An annual recharge of 38.9 cm is estimated in rice–wheat systems, and a reduction of 62% in groundwater extraction is required to reach sustainability of groundwater use at field scale. Such information cannot be obtained from classical phreatic surface fluctuation data, and unsaturated zone modelling therefore provides additional insights for groundwater policy making.
12 Homaee, M.; Dirksen, C.; Feddes, R. A.. 2002. Simulation of root water uptake: 1. Non-uniform transient salinity using different macroscopic reduction functions. Agricultural Water Management, 57(2):89-109.
Simulation models ; Calibrations ; Salinity ; Irrigation water ; Soil-water-plant relationships ; Crop yield
(Location: IWMI-HQ Call no: PER Record No: H030536)
13 Homaee, M.; Feddes, R. A.; Dirksen, C. 2002. Simulation of root water uptake: 1I. Non-uniform transient water stress using different reduction functions. Agricultural Water Management, 57(2):111-126.
Simulation models ; Calibrations ; Water deficit ; Water stress ; Soil-water-plant relationships ; Experiments
(Location: IWMI-HQ Call no: PER Record No: H030537)
14 Homaee, M.; Feddes, R. A.; Dirksen, C. 2002. Simulation of root water uptake: 1II. Non-uniform transient combined salinity and water stress. Agricultural Water Management, 57(2):127-144.
Simulation models ; Calibrations ; Salinity ; Water stress ; Soil-water-plant relationships ; Experiments
(Location: IWMI-HQ Call no: PER Record No: H030538)
15 Bos, M.G.; Vos, J.; Feddes, R.A.. 1996. CRIWAR 2.0: A simulation model on crop irrigation water requirements. The Netherlands: ILRI. 117p.: charts; 24 cm.
(Location: IWMI-SEA Call no: 333.911 G000 BOS Record No: BKK-28)
16 Farah, H. O.; Bastiaanssen, W. G. M.; Feddes, R. A.. 2004. Evaluation of the temporal variability of the evaporative fraction in a tropical watershed. International Journal of Applied Earth Observation and Geoinformation, 5(2):129-140.
Watersheds ; Evaporation ; Measurement ; Remote sensing ; River basins / Kenya / Lake Naivasha Basin
(Location: IWMI-HQ Call no: P 6975 Record No: H035192)
17 Ahmad, Mobin-ud-Din; Bastiaanssen, W. G. M.; Feddes, R. A.. 2005. A new technique to estimate net groundwater use across large irrigated areas by combining remote sensing and water balance approaches, Rechna Doab, Pakistan. Hydrogeology Journal, 13:653-664.
Groundwater management ; Estimation ; Remote sensing ; GIS ; Water balance ; Water use ; Recharge ; Irrigation management ; Sustainability / Pakistan / Rechna Doab
(Location: IWMI-HQ Call no: PER, IWMI 631.7.1 G730 AHM Record No: H036136)
Over-exploitation of groundwater resources threatens the future of irrigated agriculture, especially in the arid and semi-arid regions of the world. In order to reverse this trend, and to ensure future food security, the achievement of sustainable groundwater use is ranking high on the agenda of water policy makers. Spatio-temporally distributed information on net groundwater use— i.e. the difference between tubewell withdrawals for irrigation and net recharge—is often unknown at the river basin scale. Conventionally, groundwater use is estimated from tubewell inventories or phreatic surface fluctuations. There are shortcomings related to the application of these approaches. An alternative methodology for computing the various water balance components of the unsaturated zone by using geo-information techniques is provided in this paper. With this approach, groundwater recharge will not be quantified explicitly, but is part of net groundwater use, and the spatial variation can be quantitatively described. Records of routine climatic data, canal discharges at major offtakes, phreatic surface depth fluctuations, and simplified information on soil textural properties are required as input data into this new Geographic Information System and Remote Sensing tool. The Rechna Doab region (approximately 2.97 million ha), located in the Indus basin irrigation system of Pakistan, has been used as a case study. On an annual basis, an areal average net groundwater use of 82 mm year1 was estimated. The current result deviates 65% from the specific yield method. The deviation from estimates using tubewell withdrawal related data is even higher.
18 Sarwar, A.; Bastiaanssen, W. G. M.; Feddes, R. A.. 2001. Irrigation water distribution and long-term effects on crop and environment. Agricultural Water Management, 50:125-140.
(Location: IWMI-HQ Call no: IWMI 631.7.1 G000 SAR, PER Record No: H06945)
19 Singh, R.; van Dam, J. C.; Feddes, R. A.. 2006. Water productivity analysis of irrigated crops in Sirsa district, India. Agricultural Water Management, 82(3):253-278.
Irrigated farming ; Water use efficiency ; Soil water ; Salinity ; Simulation models ; Wheat ; Rice / India / Sirsa District
(Location: IWMI-HQ Call no: PER Record No: H038690)
20 Singh, R.; Kroes, J. G.; van Dam, J.C.; Feddes, R. A.. 2006. Distributed ecohydrological modelling to evaluate the performance of irrigation system in Sirsa district, India: I. Current water management and its productivity. Journal of Hydrology, 329:692-713.
Irrigation canals ; Water distribution ; Irrigated farming ; Remote sensing ; Models ; Performance evaluation ; Groundwater ; Recharge ; Evapotranspiration / India / Sirsa district / Bhakra Irrigation System
(Location: IWMI-HQ Call no: P 7612 Record No: H039296)
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