Progress 03/11/03 to 03/10/09
Outputs
OUTPUTS: Most of the activities this past year year have concentrated on stream stabilization of a local rural/urban watershed, Friar's Creek and estimates of sediment loading off of military training lands. Different best management practices have been implemented on individual segments of Friar's Creek. The major goal was to reduce stream bank erosion and enhance the biotic diversity in the creek. Model simulations using the degradation component indicated that portions of the creek will experience doubling of the width and depth of the creek and channel slope will decrease by half. These results indicated that significant bank erosion will occur. Also, as a member of the regional project, S1004 (Development & Evaluation of TMDL Planning & Assessment Tools & Processes, I contributed results from previous work on the upper North Bosque River in a manuscript on using simulation models for TMDL development of sediment and nutrients. Work continued on estimating sediment loadings from military lands on Cowhouse Creek on Fort Hood. Results indicated that BMP implementation around 2001 of check dams, contour tillage, and sedimentation ponds has significantly reduced by 90% the amount of erosion coming off of the training areas. These results have direct impact on techniques to follow on maintaining training area lands for maneuvers. PARTICIPANTS: Not relevant to this project. TARGET AUDIENCES: Not relevant to this project. PROJECT MODIFICATIONS: Not relevant to this project.
Impacts
Simulation models have been used to determine long-term impacts in several critical watersheds where soils are a valuable resource. In one example, implementation of various BMP's have reduced sediment loadings from military lands by 90%. In another project, other BMP's implemented on an urban/rural creek led to improved maintenance of the stream bank and increased biodiversity of the stream. As a result of the project, there has been increased awareness and need within the region for natural stream rehabilitation.
Publications
- Debra J. Rubas, James W. Mjelde, H. Alan Love, Wesley Rosenthal. (2008) How adoption rates, timing, and ceilings affect the value of ENSO-based climate forecasts. Climatic Change 86:3-4, 235-256.
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Progress 01/01/07 to 12/31/07
Outputs
Most of the activities this past year year have concentrated on stream stabilization of a local rural/urban watershed, Friar's Creek and estimates of sediment loading off of military training lands. Different best management practices have been implemented on individual segments of Friar's Creek. The major goal was to reduce stream bank erosion and enhance the biotic diversity in the creek. Model simulations using the degradation component indicated that portions of the creek will experience doubling of the width and depth of the creek and channel slope will decrease by half. These results indicated that significant bank erosion will occur. Also, as a member of the regional project, S1004 (Development & Evaluation of TMDL Planning & Assessment Tools & Processes, I contributed results from previous work on the upper North Bosque River in a manuscript on using simulation models for TMDL development of sediment and nutrients. Work continued on estimating sediment loadings
from military lands on Cowhouse Creek on Fort Hood. Results indicated that BMP implementation around 2001 of check dams, contour tillage, and sedimentation ponds has significantly reduced by 90% the amount of erosion coming off of the training areas. These results have direct impact on techniques to follow on maintaining training area lands for maneuvers.
Impacts
Simulation models have been used to determine long-term impacts in several critical watersheds where soils are a valuable resource. In one example, implementation of various BMP's have reduced sediment loadings from military lands by 90%. In another project, other BMP's implemented on an urban/rural creek led to improved maintenance of the stream bank and increased biodiversity of the stream. As a result of the project, there has been increased awareness and need within the region for natural stream rehabilitation.
Publications
- R. L. Baumhardt, J. A. Tolk, T. A. Howell, and W. D. Rosenthal. 2007. Sorghum management practices suited to varying irrigation strategies: A simulation analysis. Agron. J. 99:665-272.
- D. J. Rubas, J. W. Mjelde, H. Alan Love and W. D. Rosenthal. 2007. How adoption rates, timing, and ceilings affect the value of ENSO-based climate forecasts. Climatic Change 39:487-509.
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Progress 01/01/06 to 12/31/06
Outputs
Most of the activities this past year year have concentrated on stream stabilization of a local rural/urban watershed, Friar's Creek and estimates of sediment loading off of military training lands. Different best management practices have been implemented on individual segments of Friar's Creek. The major goal was to reduce stream bank erosion and enhance the biotic diversity in the creek. Model simulations using the degradation component indicated that portions of the creek will experience doubling of the width and depth of the creek and channel slope will decrease by half. These results indicated that significant bank erosion will occur. Also, as a member of the regional project, S1004 (Development & Evaluation of TMDL Planning & Assessment Tools & Processes, I contributed results from previous work on the upper North Bosque River in a manuscript on using simulation models for TMDL development of sediment and nutrients. Work continued on estimating sediment
loadings from military lands on Cowhouse Creek on Fort Hood. Results indicated that BMP implementation around 2001 of check dams, contour tillage, and sedimentation ponds has significantly reduced by 90% the amount of erosion coming off of the training areas. These results have direct impact on techniques to follow on maintaining training area lands for maneuvers.
Impacts
Simulation models have been used to determine long-term impacts in several critical watersheds where soils are a valuable resource. In one example, implementation of various BMP's have reduced sediment loadings from military lands by 90%. In another project, other BMP's implemented on an urban/rural creek led to improved maintenance of the stream bank and increased biodiversity of the stream. As a result of the project, there has been increased awareness and need within the region for natural stream rehabilitation.
Publications
- D. K. Borah, G. Yagow, A. Saleh, P. L. Barnes, W. Rosenthal, E. C. Krug, and L. M. Hauck. 2006. Sediment and nutrient modeling for TMDL development and implementation. Transactions of ASABE 49:967-986.
- Rosenthal, W. D., D. W. Hoffman, and W. Fox. 2006. Measured estimates of Fort Hood sediment loadings in Cowhouse Creek. Agron. Abstr.
- Borah, D. K., Borah, G. Yagow, A. Saleh, P. L. Barnes, W. Rosenthal, E. C. Krug, and L. Hauck. 2006. Sediment and nutrient modeling for TMDL development and implementation. ASABE Techn. Paper 062294. 12 pp.
- Rosenthal, W. D., D. W. Hoffman, and W. Fox. 2006. Monitored estimates of Fort Hood sediment loadings in Cowhouse Creeek. ASABE Techn. Paper 062174. 8 pp.
- Rosenthal, W. D., D. W. Hoffman, and W. Fox. 2006. Model simulation estimates of Fort Hood sediment loadings in Cowhouse Creek. 15th Annual ITAM Workshop. Abstract.
- Casebolt, P., D. W. Hoffman, W. Rosenthal, J. McAlister and J. Wolfe. 2006. Friar's Creek: Restoration and evaluation of a rural-urban stream in Central Texas. Annual Texas River and Reservoir Management Society Symposium and Conference. May 2006, Austin, TX.
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Progress 01/01/05 to 12/31/05
Outputs
Much of the activity this past year has been on completing the analysis of determining the impacts of introducing cold-tolerant grain sorghum into Texas, developing a software tool to delineate drainage patterns around wetlands, and estimating sediment loads from training areas on Ft. Hood. Results indicate that the most effective areas of introducing sold-tolerant grain sorghum are in the Panhandle and along the coastal bend. The software package was developed to aid EPA field personnel in identifying hydrologic flow patterns around wetland areas. The project was funded by EPA Region 6. A user manual was developed. Monitored stream flow and sediment data from Cowhouse Creek on Ft. Hood was analyzed. Preliminary results indicate that significant sediment loadings have occurred on Cowhouse Creek before 2002. Significant reductions after 2002 have been observed. The reductions may likely be due to several best management practices that have been implemented since 2002.
Work was also completed on reshaping the channel banks of a local urban creek in Temple. After reshaping, the banks were reseeded with several grasses and planted with nearby wetland vegetation.
Impacts
Simulation models have been used to determine long-term impacts of inn several critical watersheds where soils are valuable resource. By modeling, one can prioritize the most effective management practices to reduce sediment loading on Fort Hood and help to maintain the quality of the training areas. In an on-going project, modeling has helped to redesign channel banks of a local creek and help prevent further damage to the channel and help keep valuable urban and rural lands.
Publications
- Rosenthal, W. D. 2005. Simulations of the impacts of implementing BMPs in the Arroyo Colorado watershed. Emerging Technologies for a Sustainable Environment Workshop. Center for Research Excellence in Science and Technology-Research on Environmental Sutainability of Semi-Arid Coastal Areas (INVITED) Abstract
- Rosenthal, W. D., D. W. Hoffman, J. Wolfe III, and J. McAlister. 2005. Assessments and restoration implementations on a Central Texas rural-urban stream. Texas River and Reservoir Management Society. Fluvial Geomorphology Symposium. (INVITED) Abstract
- Hill, H. S.J., J. W. Mjelde, H. A.. Love, D. J. Rubas, S. W. Fuller, W. Rosenthal, and G. Hammer. 2004. Implications of seasonal climate forecasts on world wheat trade. A stochastic, dynamic analysis. Canadian Journal of Agricultural Economics 52:289-312.
- Rosenthal, W. D., D. W. Hoffman, J. McAlister, and P. Ellis. 2005. Friar's Creek: An urban/rural stream rehabilitation project. Agon. Abstr.
- Rosenthal, W. D. and D. W. Hoffman. 2005. Assessments and restoration implementations on a central Texas rural-urban stream. ASAE Techn. Paper 052142.
- Rosenthal, W. D., W. Fox and D. W. Hoffman. 2005. Measured estimates of sediment loadings in Cowhouse Creek on Fort Hood. 14th Integrated Training Areas Management Annual Meeting. Indianapolis, IN. Abstract
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Progress 01/01/04 to 12/31/04
Outputs
Much of the activity this past year has concentrated on publishing several articles dealing with further development of the grain sorghum growth model, SORKAM. Two refereed articles concentrated on developing algorithms to estimate seed number and individual leaf areas. A revised version of the SORKAM model will be published soon. In addition, a project was completed to simulate long-term impacts of introducing cold-tolerant grain sorghum varieties into the sorghum market in Texas. This activity was funded through the Cropping Systems Program within the Texas A&M Agricultural Program. Results indicate that the most effective areas are in the Panhandle and along the coastal bend. Earlier planting dates (3 weeks) were most effective. Another project will begin where long-term estimates of sediment loadings at the Fort Hood military base will be simulated. Channel erosion and degradation was also simulated on a rural/urban creek near Temple, Texas. This information will
be used to prioritize areas where best management practices will be implemented.
Impacts
Simulation models have been used to determine long-term impacts of erosion in several critical watersheds where soils are a valuable resource. In an on-going project, simulations of channel erosion will help prioritize potential rehabilitation areas. In a completed project, a sorghum growth simulation model was used to simulate the potential production of cold-tolerant grain sorghum within Texas.
Publications
- Gerik, T. J., W. D. Rosenthal, R. L. Vanderlip and L. J. Wade. 2004. Simulating seed number in grain sorghum from increases in plant dry weight. Agron. J. 96:1222-1230.
- Rosenthal, W. D. and R. L. Vanderlip. 2004. Simulation of individual leaf areas in grain sorghum. Agronomie 24:493-501.
- Rosenthal, W. D., T. J. Gerik, W. L. Harman and W. D. Payne. 2004. Preliminary impacts of simulating the introduction of cold tolerant sorghum in Texas. 34th Biological Systems Simulation Conference. Gainesville, FL. Abstract.
- Rosenthal, W. D., D. Hoffman and J. McAlister. 2004. Rural/urban strema rehabilitation in central Texas. ASAE Techn. Paper No. 042228. 6 pp.
- Vanderlip, R. L., R. W. Heiniger, S. A. Staggenborg, W. D. Rosenthal, and M. R. Tuinstra. 2004. Crop growth models effect change--A case history. 4th Intern. Crop Sci. Congress. 4pp.
- Rosenthal, W. D., T. J. Gerik, W. L. Harman and W. D. Payne. 2004. Impacts of simulating the introduction of cold tolerant sorghum in Texas. 2004 Great Plains Sorghum Symposium. Manhattan, KS. Abstract.
- Rosenthal, W. D, T. J. Gerik, W. L. Harman and W. D. Payne. 2004. Simulating the impacts of introducing cold-tolerant grain sorghum in Texas. Agron. Abstracts.
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Progress 01/01/03 to 12/31/03
Outputs
Much of the activity this past year has concentrated on publishing several articles/chapters dealing with the use of the SWAT (Soil and Water Assessment Tool) model. Publications this past year include the results of removing brush using the hydrologic model, SWAT, on specific watersheds across Texas (e.g., Edwards Aquifer, and Fort Phantom Hill). Three chapters have been published through the Texas Water Resources Institute and one chapter through Marcel Decker Publishing (Encyclopedia of Water Science). The Edwards Aquifer analysis included brush scenarios of 1) removing brush on all areas except on slopes greater than 15 percent , 2) removing brush on all areas except on slopes greater than 15 percent and within 75 meters of a stream course, 3) same as 2) except that only 40% of the brush is remaining in each watershed subbasin, 4) current brush conditions, and 5)allowing the brush density to increase with time. Results were presented in the 2002 progress report. A
similar brush removal project at Fort Phantom Hill, near Abilene, Texas, was also published. Results from that study were also presented in the 2002 progress report. Research work is continuing on developing a revised version of the grain sorghum growth simulation model (SORKAM). This is in conjunction with Drs. Richard Vanderlip (Kansas State University) and Ronnie Heiniger (North Carolina State). A version will be published this year. In addition, a project was initiated to simulate the impact of introducing cold-tolerant grain sorghum varieties into the sorghum market in Texas. This activity is being funded through the Cropping Systems Program within the Texas A&M Agricultural Program.
Impacts
Simulation models have been used to determine long-term impacts of brush removal on increasing water quantity in several critical watersheds where water is a valuable resource. In a new project, a sorghum growth simulation model will be used to simulate the potential production of grain sorghum within Texas.
Publications
- Dugas, W. A., S. Bednarz, T. Dybala, R. Muttiah, and W. D. Rosenthal. 2003. The influence of bush clearing on rangeland water yield. IN: Encyclopedia of Water Science. (Ed. B. A. Stewart and T. Howell). Marcel Decker, Inc. New York, New York. pp. 788-790.
- Rosenthal, W. D., D. Hoffman, and J. Wolfe II. 2003. Simulations and measurements from implemented management practices on Shoal Creek, Ft. Hood. American Society of Agricultural Engineers Technical Paper 032306. July. Las Vegas, NV. 10 pp.
- Rosenthal, W. D., W. Dugas, R. Muttiah, S. Bednarz, T. Dybala, and C. Amonett. 2002. Simulation of brush removal within an urban watershed in Texas. Agron. Abstracts. November. Indianapolis, IN.
- Rosenthal, W. D., W. Dugas, R. Muttiah, S. Bednarz, T. Dybala, and C. Amonett. 2003. Simulation of brush removal within an urban watershed in Texas. Biological Systems Simulation Group Workshop. March. San Antonio, TX. Abstract.
- Rosenthal, W. D. and R. L. Vanderlip. 2003. Improved simulation of individual sorghum leaf area. 23rd Biennial Sorghum Research and Utilization Conference. February. Albuqerque, NM. Abstract.
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Progress 01/01/02 to 12/31/02
Outputs
Much of the progress dealt with completion of several projects that applied the hydrologic model, SWAT (Soil and Water Assessment Tool) on specific watersheds across Texas. One of the projects was to assess the long-range impacts of implementing best management plans within the Arroyo Colorado region near the Rio Grande Valley in Texas. Simulated results indicate that implementation of fertilizer management practices on all agricultural land can reduce soluble P in runoff by as much as 50%. Implementing only on 1999-2002 acreages suggest a 36% soluble P reduction. Another project analyzed the long-term effect of five brush removal scenarios on water yield in the Edwards Aquifer (Frio and Sabinal watersheds). The scenarios analyzed were 1) remove brush on all areas except on slopes greater than 15 percent, 2) remove brush an all areas except on slopes greater than 15 percent and within 75 meters of a mapped stream course, 3) same as 2) except that the only 40% of the
brush is remaining in each watershed subbasin, 4) current brush conditions and 5) allowing the brush density to increase with time. Results indicate that compared to scenario 4, scenario 1 had the highest water yield increase (roughly 32,000 and 21,000 acre-ft/year for the Frio and Sabinal watersheds, respectively). Scenarios 2 and 3 were approximately 20% less than scenario 1. A similar project analyzed the long-term effect of brush removal in an urbanized watershed in west-central Texas (Fort Phantom Hill Reservoir watershed, surrounding Abilene, Texas). In this study, all mesquite and juniper were removed in the watershed. Results indicate that a 64% increase in stream flow to Fort Phantom Hill Reservoir and a 79% increase in water yield can be expected through brush removal. The largest impact can be seen in the western part of the watershed (around Lake Abilene). A publication dealing with the impacts of brush removal in south Texas was published. This dealt with developing an
economic model for water valuation in south Texas. Other relevant work concentrated on wheat yield simulations (CERES-Wheat) to determine the impacts of El-Nino/La-Nina on wheat production in China. This information was then used to develop marketing models for China and the rest of the world. Work is still continuing on improving the leaf growth simulations across grain sorghum maturities using the SORKAM model. This is an important component that will be included in the revised version of the SORKAM model.
Impacts
Major impacts from the completed studies are in increasing stream flow and water yield through brush removal. The impacts are critical in times of increasing water shortages in variable climates.
Publications
- B. Lemberg, J. Mjelde, J. Conner, R. Griffin, W. Rosenthal, and J. Stuth. 2002. Integrating ecological , hydrologic and economic models for water valuation in South Texas. Journal of the American Water Resources Association 38:409-422.
- W. D. Rosenthal. 2002. Impacts of brush removal in south Texas. Amer. Soc. Agric. Eng. Annual Meetings. Technical Paper #022168. 21 pp.
- S. Bednarz, T. Dybala, C. Amonett, R. Muttiah, W. Rosenthal, W. Dugas, R. Srinivasan, and J. Arnold. 2002. An interdisciplinary approach to brush management and water yield. Section 1. In: Ecosystem and Wildlife Implications of Brush Management: Systems Designed to Improve Water Runoff and Percolation. Final Report to Army Corps of Engineers. Texas Water Resources Institute. TR-201. Pp. 11-25.
- W. D. Rosenthal. 2002. Lake Fort Phantom Hill Watershed-Hydrologic Simulation. Chapter 7. In: Brush Management/Water Yield Feasibility Study for Four Watersheds in Texas. Texas Water Resources Institute. TR-207. Pp. 79-98.
- S. Bednarz, T. Dybala, C. Amonett, R. Muttiah, W. Rosenthal, W. Dugas, R. Srinivasan, and J. Arnold. 2002. Brush/Water Yield Studies II. Chapter 1. Texas Water Resources Institute. TR-207. Pp. 1-16
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Progress 01/01/01 to 12/31/01
Outputs
Work is proceeding in publishing recent improvements in the grain sorghum growth model, SORKAM. Manuscript descriptions of the calculations of seed weight and number, tiller number, and leaf growth are being developed. Future work will be to incorporate revised tillering and water stress algorithms into the model. A book chapter describing wheat production functions for the U.S., Canada, and Australia as affected by El-Nino/Southern Oscillation (ENSO) conditions has been published. The production functions were produced for different regions using the CERES-wheat model. Each country had different production curves with different phases of the southern oscillation index (SOI). A significant activity was involved in determining the effect of brush removal on water yield in the Frio and Sabinal watersheds. The SWAT (Soil-Water Assessment Tool) model was used to evaluate the impact of these practices. Results from other similar watersheds indicate a significant increase
in water yield at the outlet of the watershed. Water quantity and quality continue to be simulated and verified with available monitored data from the Leon River watershed. Final results for the Arroyo Colorado river basin are not complete as more simulations using SWAT and APEX are being conducted.
Impacts
No impact reported.
Publications
- Y. Xie, J.R. Kiniry, V. Nedbalek, and W.D. Rosenthal. 2001. Maize and sorghum simulations with CERES-Maize, SORKAM, and ALMANAC under water-limiting conditions. Agronomy Journal 93:1148-1155.
- W.D. Hoffman, W.D. Rosenthal, J.E. Wolf III, And R. Hicks. 2001. Sediment Losses from Central Texas range land. IN: Planning and Implementing Integrated Rangeland, Forage, and Livestock Systems Research for the Northern and Central Great Plains, USA. Abstracts for the Society for Range Managements. Honolulu, Hawaii. Pg. 59.
- B. Lemberg, J. Mjelde, J. Conner, R. Griffin, W. Rosenthal, and J. Stuth. 2001. Ecological, hydrologic and economic models for water vaulation in the Frio River Basin, Texas. IN: Integrated Decision-Making for Watershed Management Symposium. January 7-9. Chevy Chase, MD. Pg. 94.
- H.S.J. Hill, D. Butler, S. Fuller, G.L. Hammer, D. Holzworth, H.A. Love, H. Meinke, J.W. Mjelde, J. Park, and W.D. Resenthal. 2001. Effects of seasonal climate variability and the use of climate forecasts an wheat supply in the United States, Australia, and Canada. IN: Impact of El Nino and Climate Variability on Agriculture. American Society of Agronomy Special Publication no. 63. Chapter 7. pg. 101-123.
- W.D. Rosenthal, W.L. Harman, E. Wang, B. Sheng. 2001. Arroyo Colorado River nutrient losses: An investigation of residue management through conservation tillage to reduce nutrient losses. Blackland Research Center Report No. 01-32. January 2000. 11 pp.
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Progress 01/01/00 to 12/31/00
Outputs
Work is proceeding in publishing recent improvements in the grain sorghum growth model, SORKAM. Manuscript descriptions of the calculations of seed weight and number, tiller number, and leaf growth are being developed. Future work will be to incorporate revised tillering algorithms into the model. A manuscript describing wheat production functions for the U.S., Canada, and Australia as affected by El-Nino/Southern Oscillation (ENSO) conditions has been published. The production functions were produced for different regions using the CERES-wheat model. Each country had different production curves with different phases of the southern oscillation index (SOI). A significant activity was involved in determining the effect of brush removal on water yield in the Frio, Nueces, and Pedernales watersheds. The SWAT (Soil-Water Assessment Tool) model was used to evaluate the impact of these practices. Results indicate a significant increase in water yield at the outlet of the
watershed. Water quantity and quality continue to be simulated and verified with available monitored data. The concentrated areas are the Leon River, Arroyo Colorado, and the Fort Hood military reservation. Simulated results are not complete as more monitored data are being collected.
Impacts
(N/A)
Publications
- Hill, H. S. J., J. Park, J. W. Mjelde, W. D. Rosenthal, H. A. Love, and S. W. Fuller. 2000. Comparing the value of southern oscillation index-based climate forecast methods for Canadian and U.S. wheat producers. Agric. and Forest Meteorology 100:261-272.
- Rosenthal, W. D., D. W. Hoffman, and J. Burger. 2000. TMDL monitoring and implementation programs for central Texas. ASAE Techn. Paper #002088.
- Lemberg, B., J. W. Mjelde, J. R. Conner, R. C. Griffin, W. D. Rosenthal, and J. W. Stuth. 2000. Integrating ecological hydrologic and economic models for water valuation in south Texas. Southern Agricultural Economics Association Annual Meeting. March 2000. Galveston, TX. pg. 89.
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Progress 01/01/99 to 12/31/99
Outputs
Work is proceeding in publishing recent improvements in the grain sorghum growth model, SORKAM. Manuscripts description calculations of seed weight and number, tiller number, and leaf growth are being edited. Future work will be to incorporate the water balance components (developed by Carlos Fernandez-TAES Corpus Christi) into the model. The cotton growth model, ICEMM (developed by Juan Landivar-TAES Corpus Christi) has been instaled onto a server that will allow access to run and access the MUUF soil databases over the Internet. A manuscript describing wheat production functions for the U.S., Canada, and Australia as affected by El-Nino/Southern Oscillation (ENSO) conditions has been accepted. The production functions were produced for different regions using the CERES-wheat model. Each country had different production curves with different phases of the southern oscillation index (SOI). U.S. Winter and Canada wheat had higher production in rapidly falling SOIL
conditions. Australia had the lowest production of all ENSO conditions during the same phase. A paper summarizing the results was presented at the American Society of Agronomy meetings and has been accepted for publication as a part of an ASA Special Publication. Water quantity and quality continue to be simulated and verified with available monitored data. The concentrated areas are the Leon River, Brazos/Colorado coastal basin, and the Fort Hood military reservation. Simulated results are not complete as more monitored data are being collected.
Impacts
(N/A)
Publications
- Rosenthal, W. D. and D. Hoffman. 1999. Hydrologic modeling/GIS as an aid in locating monitoring sites. Trans. ASAE 42(6) (in press).
- Hill, H.S., J. Mjelde and W. D. Rosenthal. 1999. The potential impacts of the use of southern oscillation information on Texas aggregate sorghum production. J. of Climate.
- Wolfe, J. e., III, W. D. Rosenthal 12:519-530. 1999. Modeling water quality to evaluate land management practices in the Fort Hood Military Reservation. Agron. Abstr. Pg. 11.
- Rosenthal, W. D., W. L. Harman, J. Stuth, D. Schmidt, K. Rauder, S. Dagitz, G. Buck and P. T. Dyke. 1999. Common Modeling Environment (CME): Internet accessibility for biophysical modeling using common databases. Agron. Abstr. Pg. 355.
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Progress 01/01/98 to 12/31/98
Outputs
Work is proceeding in publishing recent improvements in the grain sorghum growth model, SORKAM. In March, a paper was presented at the Crop Simulation Workshop. An overview of calculations of seed weight and number, tiller number, and front-end menus was presented. Future work will be to incorporate the water balance components (developed by Carlos Fernandez-TAES Uvalde) into the model. Efforts are also proceeding to install the cotton growth model, ICEMM (developed by Juan Landivar-TAES Corpus Christi) onto a server that will allow access to run and access the MUUF soil databases over the internet. Progress was made in developing wheat production functions for the U.S., Canada, and Australia as affected by El-Nino/Southern Oscillation (ENSO) conditions. The production functions were produced for different regions using the CERES-wheat model. Each country had different production curves with different phases of the southern oscillation index (SOI). U. S. Winter and
Canada wheat had higher production in rapidly falling SOI conditions. Australia had the lowest production of all ENSO conditions during the same phase. A paper summarizing the results was presented at the American Society of Agronomy meetings and has been submitted for publication as a part of an ASA Special Publication. Water quantity and quality continue to be simulated and verified with available monitored data. The concentrated areas are the Leon river, Brazos/Colorado coastal basin, and he Fort Hood military reservation. Simulated results are not complete as more monitored data are being collected.
Impacts
(N/A)
Publications
- Rosenthal, W. D. and D. W. Hoffman. 1998. Measured and modeled loadings in the Fort Hood military reservation. ASAE Techn. Paper #982052.
- Saleh, A., J. Arnold, L. Hauck, W. D. Rosenthal, P. Gassman, and A. McFarland. 1998. Claibraiton of the Soil and Water Assessment Tool (SWAT) model for the upper North Bosque River in central Texas. ASAE Techn. Paper #983137.
- Hill, H. S., A. Love, J. Mjelde, G. Hammer, W. Rosenthal, D. Butler, S. Fuller, and J. Park. 1998. Modeling the implications of improved forecasts on the international wheat sector. Agron. Abstr. Pg. 22.
- W. D. Rosenthal. 1998. Improvements in the sorghum growth model, SORKAM. Proc. 28th Annual Crop Simulation Workshop. Pg. 34.
- Rosenthal, W. D., G. L. Hammer, and D. Butler. 1998. Predicting regional grain sorghum production in Australia using spatial modeling. Agric. and Forestry Meteorology 91:263-274.
- Hill, H. S., J. Mjelde and W. D. Rosenthal. 1998. The potential impacts of the use of southern oscillation information on Texas aggregate sorghum production. J. of Climate (in Press).
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