Zobrazeno 1 - 10
of 17
pro vyhledávání: '"J. K. Koelliker"'
Publikováno v:
Transactions of the ASABE. 53:65-74
The spatial resolution of input rainfall data affects hydrologic model response and accuracy. The objective of this study was to evaluate the effects of spatial rainfall aggregation on predicted streamflow at five streamgage sites in the 6,316 km2 Sm
Publikováno v:
Transactions of the ASABE. 53:1511-1520
Prediction accuracy of physically based hydrologic models largely depends on how well the models and input data represent the real world in terms of precipitation, topography, soils, land use/land cover, and land management. Precipitation is, by far,
Publikováno v:
Ecosystems. 4:19-28
The frequency and extent of water limitation to aboveground net primary production (ANPP) in a mesic grassland in NE Kansas (Konza Prairie, USA) was assessed with an 8-year irrigation experiment. Since 1991, transects spanning upland and lowland site
Publikováno v:
Journal of the American Water Resources Association. 35:1069-1080
Watershed planning groups and action agencies seek to understand how lake water quality responds to changes in watershed management. This study developed and demonstrated the applicability of an integrated modeling approach for providing this informa
Autor:
J. K. Koelliker, Darrell L. Oard, A. P. Schwab, Prasanta K. Kalita, R. Black, G. J. Kluitenberg, M. J. Borah, Philip L. Barnes, J. M. Steichen
Publikováno v:
Applied Engineering in Agriculture. 14:485-491
Four monolithic weighing lysimeters (1.83 m × 1.83 m × 1.52 m deep) were installed at Kansas State University in 1994 with undisturbed soils from two different locations in Kansas. The soil tanks were constructed with 6.4-mm (0.25-in.) thick metal
Publikováno v:
Journal of Hydrologic Engineering. 1:131-138
The spatial variability of soil hydraulic properties that govern infiltration were investigated at two sites in the Konza Prairie Research Area in Kansas. One site was a pristine prairie site with native grass, and the other was a continuously croppe
Autor:
A. N. Lin, J. K. Koelliker
Publikováno v:
Applied Engineering in Agriculture. 8:229-235
Fifty corrugated metal pipe (CMP) conduits in dams in the Midwest were inspected visually and evaluated to determine the overall condition of such conduits. Each was rated on aspects of joints, corrosion, lining, and their estimated remaining life (E
Publikováno v:
Applied Engineering in Agriculture. 6:601-606
A system which consists of a portable, self-propelled vehicle to transport a video camera to record a tape of the inside of circular conduits is described. A rating system to evaluate the condition of the conduit based upon the visual aspects observe
Publikováno v:
Transactions of the ASAE. 22:0803-0808
A computer-simulation model for open feedlot runoff-control systems was used to develop a data base of important climatic variables that can affect the per-formance of systems. Moisture deficit was found to be most important for irrigation-disposal s
Publikováno v:
Soil Science Society of America Journal. 48:578-582
The influence of soil pH and soil cation exchange capacity on ammonia volatilization from surface applied ammoniacal nitrogen has been reported in previous studies. Since the hydrolysis of ureacontaining N fertilizers causes an increase in alkalinity