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Full-Text Articles in Forest Sciences
Using Google Earth For Forest Management, Yanli Zhang, Jeremy P. Stovall
Using Google Earth For Forest Management, Yanli Zhang, Jeremy P. Stovall
Faculty Publications
No abstract provided.
Measuring Tree Height Using Pictometry Hyperspatial Imagery, Daniel Unger, David Kulhavy, Matthew A. Wade, I-Kuai Hung
Measuring Tree Height Using Pictometry Hyperspatial Imagery, Daniel Unger, David Kulhavy, Matthew A. Wade, I-Kuai Hung
Faculty Publications
Trees within Nacogdoches, Texas were measured for height using Pictometry hyperspatial imagery at 4 inch spatial resolution. Trees measured included baldcypress located on LaNana Creek as part of a hybrid analysis study. Baldcypress, Taxodiumdistichum, was planted along La Nana Creek, Nacogdoches, Texas, for erosion control and as a test bank for growth of the species genotypes. Each tree was located with GPS and entered into the GIS data base in the Arthur Temple College of Forestry and Agriculture, Stephen F. Austin State University. Actual tree height, measured using a height pole in 0.1 inch increments, was compared to …
Crowdsourcing With Arcgis Online For Natural Resources Management, Yanli Zhang, Matthew W. Mcbroom, Jason Grogan, Paul R. Blackwell
Crowdsourcing With Arcgis Online For Natural Resources Management, Yanli Zhang, Matthew W. Mcbroom, Jason Grogan, Paul R. Blackwell
Faculty Publications
No abstract provided.
Snapping A Pour Point For Watershed Delineation In Arcgis Hydrologic Analysis, Yanli Zhang, Matthew W. Mcbroom, Jason Grogan, I-Kuai Hung
Snapping A Pour Point For Watershed Delineation In Arcgis Hydrologic Analysis, Yanli Zhang, Matthew W. Mcbroom, Jason Grogan, I-Kuai Hung
Faculty Publications
No abstract provided.
Soil Erosion Modeling With The Modified Universal Soil Loss Equation, Yanli Zhang, Jason Grogan, I-Kuai Hung, Ramanathan Sugumaran
Soil Erosion Modeling With The Modified Universal Soil Loss Equation, Yanli Zhang, Jason Grogan, I-Kuai Hung, Ramanathan Sugumaran
Faculty Publications
No abstract provided.
Soil Viewer Extension Brings Soil Data To Your Gis, Jason Grogan, I-Kuai Hung, Yanli Zhang
Soil Viewer Extension Brings Soil Data To Your Gis, Jason Grogan, I-Kuai Hung, Yanli Zhang
Faculty Publications
No abstract provided.
Collecting Multiple Point Features Referenced To A Single Geographic Position In Arcpad, Jason Grogan, I-Kuai Hung, Yanli Zhang
Collecting Multiple Point Features Referenced To A Single Geographic Position In Arcpad, Jason Grogan, I-Kuai Hung, Yanli Zhang
Faculty Publications
No abstract provided.
Assessing Ecological Functions Of Bottomland Hardwood Wetlands Using Remote Sensing And Geographic Information Systems, Rachel Mcnamee, Hans Michael Williams, Kenneth W. Farrish, I-Kuai Hung, Daniel Unger
Assessing Ecological Functions Of Bottomland Hardwood Wetlands Using Remote Sensing And Geographic Information Systems, Rachel Mcnamee, Hans Michael Williams, Kenneth W. Farrish, I-Kuai Hung, Daniel Unger
Faculty Presentations
Bottomland hardwoods are one of the most rapidly diminishing wetland ecosystems due to agricultural clearing, development, and reservoir construction. As society has become more aware of the functions of wetlands, so has the importance in conservation of these valuable resources. The objective of this study was to compare the accuracy of Remote Sensing and GIS based functional assessment to the field based Hydrogeomorphic (HGM) approach. Remote sensing models were developed using a combination of soil maps, soil information, QuickBird ® multispectral satellite imagery, LiDAR derived Digital Elevation Model (DEM), and LiDAR derived Canopy Height Model. Results, although mixed, indicated that …
Integration Of Modified Universal Soil Loss Equation (Musle) Into A Gis Framework To Assess Soil Erosion Risk, Yanli Zhang, J. Degroote, Calvin Wolter, Ramanathan Sugumaran
Integration Of Modified Universal Soil Loss Equation (Musle) Into A Gis Framework To Assess Soil Erosion Risk, Yanli Zhang, J. Degroote, Calvin Wolter, Ramanathan Sugumaran
Faculty Publications
Soil erosion is an important economic and environmental concern throughout the world. In order to assess soil erosion risk and conserve water and soil resources, soil erosion modeling at the watershed scale is urgently needed. This study integrated the Modified Universal Soil Loss Equation (MUSLE) in a Geographic Information System (GIS) framework in the form of a tool called ArcMUSLE, an extension of ArcGIS® software, to assist soil and water conservation agencies in soil erosion risk assessment and prioritization of critical areas for soil erosion control practices. With widely available spatial data, this tool can be applied to determine curve …
Watershed Forest Management Information System (Wfmis), Yanli Zhang, P. K. Barten
Watershed Forest Management Information System (Wfmis), Yanli Zhang, P. K. Barten
Faculty Publications
Maintenance of a sustainable clean water supply is critical for our future. However, watershed degradation is a common phenomenon around the world that leads to poor water quality. In order to protect water resources, the Watershed Forest Management Information System (WFMIS), was developed as an extension of ArcGIS® and is described in this paper. There are three submodels to address nonpoint source pollution mitigation, road system management, and silvicultural operations, respectively. The Watershed Management Priority Indices (WMPI) is a zoning approach to prioritize critical areas for conservation and restoration management. It meets the critical need to spatially differentiate land cover …
Evaluating Forest Harvesting To Reduce Its Hydrologic Impact With A Spatial Decision Support System, Yanli Zhang, P. K. Barten, Ramanathan Sugumaran
Evaluating Forest Harvesting To Reduce Its Hydrologic Impact With A Spatial Decision Support System, Yanli Zhang, P. K. Barten, Ramanathan Sugumaran
Faculty Publications
Timber harvesting changes the condition of forest ecosystems, which are a major influence on the characteristics of headwater streams. Such characteristics include the quantity and timing of base flow and storm flow, concentrations of sediment and dissolved nutrients, water temperature, and the stability of the stream channels. This paper explores previous studies dealing with the relationship between timber harvesting and its hydrologic effects, especially long term water yield increase. The watershed disturbance threshold theory is raised and investigated in detail. The development and evaluation of a spatial decision support system, the Harvest Schedule Review System (HSRS), is then described. The …
Landscape Analysis Of George W. Pirtle Scout Reservation, David Kulhavy, Daniel Unger, Frank B. Shockley, Josh Bardwell
Landscape Analysis Of George W. Pirtle Scout Reservation, David Kulhavy, Daniel Unger, Frank B. Shockley, Josh Bardwell
Faculty Presentations
To assist in detecting change over time for the forested landscape of George W. Pirtle Scout Reservation, Panola County, Texas, digital ortho-photography imagery (acquired 1996 and 2004) were used to designate forest cover types and hazard rating for forest insects and diseases. Status of camp grounds was ascertained and recommendations made for management using the GIS database created for the camp.
Remotely Sensed Data To Map Forest Age Class By Cover Type In East Texas, Daniel Unger, I-Kuai Hung, Jeffrey M. Williams, James Kroll, Dean W. Coble, Jason Grogan
Remotely Sensed Data To Map Forest Age Class By Cover Type In East Texas, Daniel Unger, I-Kuai Hung, Jeffrey M. Williams, James Kroll, Dean W. Coble, Jason Grogan
Faculty Publications
- Remote sensing in conjunction with ground truthing, can accurately quantify forest composition and age distributions in East Texas.
- Method uses standardized and readily available data available to the general public.
- Method was shown to be effective in terms of time and cost.
Using Gis For Forest Recreation Planning On The Longleaf Ridge Special Area Of The Angelina National Forest, East Texas, I-Kuai Hung
Faculty Publications
Longleaf Ridge Special Area (LRSA) located in the Angelina National Forest is the westernmost example of a longleaf pine savanna community. Ecologically, the area is one of the most diverse communities in Texas. Due to its size, abundant natural and historical resources, numerous outdoor recreation opportunities exist. In this study, GIS was used to develop a forest recreation concept plan on LRSA. Most of the geospatial data came from public entities. Information for demand analysis on forest recreation was obtained from the 2000 National Survey on Recreation and the Environment database. U.S. Forest Service recreation fee envelope data were analyzed …