Your search found 9 records
1 Gon+alves, J. M.; Sousa, P. L.; Pereira, L. S. 1993. Field evaluation of continuous and surge irrigation on furrows with different tillage practices. In ICID, 15th International Congress on Irrigation and Drainage, The Hague, The Netherlands, 1993: Water management in the next century. Transactions: Vol.1-A, Question 44, RI-R35: Planning and design of irrigation and drainage systems. pp.403-415.
Surge irrigation ; Furrow irrigation ; Tillage ; Evaluation ; Simulation models / Portugal / Mondego Valley
(Location: IWMI-HQ Call no: ICID 631.7 G000 ICI Record No: H015092)
2 Santos, D. V.; Smith, R. E.; Sousa, P. L.; Pereira, L. S. 1996. Calibration and validation of model Opus for water and nitrate simulation. 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.17-28.
Simulation models ; Calibrations ; Basin irrigation ; Irrigation water ; Nitrogen ; Fertilizers ; Soil water movement ; Soil moisture ; Maize ; Fertigation / Portugal
(Location: IWMI-HQ Call no: 631.7.1 G000 RAG Record No: H019362)
The model Opus is used to simulate water and nitrate movement through an irrigated soil during a simulation term of five months. The study was developed for two fertigation events in a level-basin 15 x 220 m cultivated with corn in Southern Portugal. In each fertigation an average of 85 mm of water and 50 kg N/ha (UAN) were applied. Experimental results from one monitored soil profile were used to calibrate the hydrodynamic components. The solute movement components were then validated for all seven monitored sites. While Opus has been designed for simulation on a long-term basis, integrating a large number of components, the results for a short term application indicated a good ability of the model to describe the water and NO3-N movement in level-basin irrigation.
3 Cameira, M. R.; Sousa, P. L.; Farahani, H. J.; Ahuja, L. R.; Pereira, L. S. 1996. Simulation of water and nitrates in level basin fertigated maize using RZWQM. 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.42-53.
Water quality ; Simulation models ; Nitrogen ; Fertilizers ; Maize ; Basin irrigation ; Soil moisture / Portugal / Sorraia River
(Location: IWMI-HQ Call no: 631.7.1 G000 RAG Record No: H019364)
This study concerns the evaluation of the ability of Root Zone Water Quality Model (RZWQM) to simulate the seasonal water and nitrate movement in a level basin irrigated corn field under three different fertilizer treatments by comparing simulated and measured soil moisture and nitrate profiles for the growing season. The treatments were a single broadcast application of Urea, a single fertigation with UAN through the first irrigation, and multiple UAN fertigations through all irrigations. First, the model was parameterized for maize using data from the single fertigation treatment. Evaluation runs, using the parameterized model, were conducted for the other two treatments. The model simulated water and nitrate transport well for the season, with the seasonal mean of measured and predicted values differing by less than 5%. Computer requirements: an 80386 or better CPU with math coprocessor; IBM PC-DOS or MS-DOS, Version 5.0 or later; at least 4 megabytes of RAM.
4 Santos, D. V.; Sousa, P. L.; Smith, R. E. 1997. Model simulation of water and nitrate movement in a level-basin under fertigation treatments. Agricultural Water Management, 32(3):293-306.
Simulation models ; Decision support tools ; Fertilizers ; Nitrogen ; Leaching ; Soil water ; Maize ; Soil moisture ; Water balance ; Water table / Portugal / Sorraia River Irrigation Project
(Location: IWMI-HQ Call no: PER Record No: H020448)
5 Caldas, J. C.; Sousa, P. L.; Pereira, L. S. 1997. Need for new approaches in valuing water: Learning from a less successful case. In Kay, M.; Franks, T.; Smith, L. (Eds.), Water: Economics, management and demand. London, UK: E & FN Spon. pp.137-144.
Water resource management ; Water availability ; Irrigation programs ; Water use efficiency ; Water costs ; Pricing ; Case studies / Portugal / Alentejo / Caia
(Location: IWMI-HQ Call no: 631.7 G000 KAY Record No: H023051)
6 Santos, D. V.; Sousa, P. L.; Pereira, L. S. 1998. Nitrate movement in level basins: Reduced versus conventional soil tillage. In Pereira, L. S.; Gowing, J. W. (Eds.). Water and the environment: Innovation issues in irrigation and drainage: Selected papers of the 1st Inter-Regional Conference “Environment-Water: Innovative Issues in Irrigation and Drainage,” Lisbon, Portugal, Sept. 1998. London, UK: E & FN Spon. pp.43-51.
(Location: IWMI-HQ Call no: 631.7.1 G000 PER Record No: H039016)
7 Goncalves, J. M.; Pereira, L. S.; Sousa, P. L.. 1998. Environmental criteria in a decision support system for surface irrigation design. In Pereira, L. S.; Gowing, J. W. (Eds.). Water and the environment: Innovation issues in irrigation and drainage: Selected papers of the 1st Inter-Regional Conference “Environment-Water: Innovative Issues in Irrigation and Drainage,” Lisbon, Portugal, Sept. 1998. London, UK: E & FN Spon. pp.111-119.
(Location: IWMI-HQ Call no: 631.7.1 G000 PER Record No: H039024)
8 Calejo, M. J.; Sousa, P. L.; Pereira, L. S. 1998. Evaluation of performance of surface irrigation systems: Optimization of infiltration and roughness parameters. In Pereira, L. S.; Gowing, J. W. (Eds.). Water and the environment: Innovation issues in irrigation and drainage: Selected papers of the 1st Inter-Regional Conference “Environment-Water: Innovative Issues in Irrigation and Drainage,” Lisbon, Portugal, Sept. 1998. London, UK: E & FN Spon. pp.140-148.
(Location: IWMI-HQ Call no: 631.7.1 G000 PER Record No: H039027)
9 Douieb, A.; Bounoua, R.; Pereira, L. S.; Sousa, P. L.; Lamaddalena, N. 1998. New approaches to design and performance analysis of low pressure distribution systems. In Pereira, L. S.; Gowing, J. W. (Eds.). Water and the environment: Innovation issues in irrigation and drainage: Selected papers of the 1st Inter-Regional Conference “Environment-Water: Innovative Issues in Irrigation and Drainage,” Lisbon, Portugal, Sept. 1998. London, UK: E & FN Spon. pp.256-265.
(Location: IWMI-HQ Call no: 631.7.1 G000 PER Record No: H039036)
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