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- Gelder, B. K., et al. Show all 6 Authors
- Journal of environmental quality 2015 v.44 no.3 pp. 768-779
- buffers; classification; digital elevation models; ecosystem services; groundwater; landforms; lidar; planning; pollution load; riparian areas; riparian buffers; runoff; sediments; streambank stability; streams; vegetation; water table; watersheds; Illinois; Iowa
- ... A watershed’s riparian corridor presents opportunities to stabilize streambanks, intercept runoff, and influence shallow groundwater with riparian buffers. This paper presents a system to classify these riparian opportunities and apply them toward riparian management planning in hydrologic unit code 12 watersheds. In two headwater watersheds from each of three landform regions found in Iowa and Il ...
- Gelder, B. K., et al. Show all 3 Authors
- Agronomy journal 2009 v.101 no.3 pp. 635
- crop residues; vegetation cover; remote sensing; spectral analysis; satellites; measurement; estimation; color; vegetation; seedling emergence; reflectance; tillage; lignin; cellulose; Iowa
- ... Knowledge of residue cover is crucial for targeting conservation efforts to reduce soil erosion, runoff, and associated environmental impacts; however, a rapid, accurate, inexpensive methodology is not currently available. Previous studies have shown mixed results detecting crop residue using Landsat residue indices, but conditions generally included poor soil color contrast, emergent vegetation, ...
- Gelder*, B. K., et al. Show all 5 Authors
- Soil Science Society of America journal 2011 v.75 no.5 pp. 1821-1828
- aerial photography; databases; georeferencing; image analysis; precision agriculture; remote sensing; soil; soil organic carbon; soil surveys; tillage; Iowa
- ... Widespread implementation of precision agriculture practices requires low-cost, high-quality data such as soil organic C (SOC) content, but SOC mapping currently requires expensive sample collection and analysis techniques. Soils higher in organic C appear darker than surrounding soils in aerial imagery after tillage, although this difference is only relative without knowledge of the range of SOC. ...