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ABOUT SCALE HIVES HONEYBEES SITE DATA NEWS LINKS
Springdale2, AR
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County:  Springdale State: AR
Active Since: 2011 Observer: Patterson
Lat/Long: 36.1, -94.1 Landsat WRS Path/Row: 25/35
MODIS TIle V/H: 0/0 MODIS Line, Samp: 0.00, 0.00

Site/Hive Description:

The location is suburban with large undeveloped tracts nearby including scattered trees and wooded regions mostly along rights of way.

Colony:
A colony was started from a 3 lb package on 2 April 2011. The hive is 10 frame Langstroth type with 2 deep brood boxes and a medium super.

Scale:
The scale is a 1000 lb capacity Fairbanks (0.5 lb divisions), and a 15 lb dumbbell serves as a test weight and indicates accurate performance. The scale hive is exposed to the elements.

Forage:
Forage of interest includes catalpa, magnolia, some tulip poplar, blackberries, and white dutch clover. There are some fields, but this is not a major agricultural setting.

Nectar Flow Data 2011

Download Data File (comma delimited), download QA flag key

 

 
MODIS Subset Data (from the ORNL DAAC)
Red dots are the average of all pixels with acceptable quality (see landcover extract below for area covered).
Blue dots are the center pixel only (point is not plotted if the pixel is of unacceptable quality).

 

NDVI

The Normalized Difference Vegetation Index (NDVI) is the ratio of the  difference between visible (red) and infra-red (IR) wavebands to the sum of these bands. 

NDVI = nir - red / nir + red


 NDVI provides an indication of the amount and vigor of vegetated  surfaces. 

 NDVI has been widely used with multiple generations of satellite data.

EVI

 The Enhnaced Vegetation Index (EVI) is a more complicated combination of wavebands compared to the more widely used index, NDVI.  The advantage of this newer index is improved sensitivity in high biomass regions and reduction in atmospheric influences.
where,
pNIR = NIR reflectance
pRed = red reflectance
pBlue = blue reflectance
C1 = atmosphere resistance red correction coefficient
C2 = atmosphere resistance blue correction coefficient
L = canopy background brightness
G = gain factor

The MODIS sensor on the Terra satellite platform provides us with 16-day composite measures of NDVI/EVI throughout the year.  NASA distributes MODIS data from many of their distributed data centers.

MODIS Land Cover

MODIS Data Subset Citation:
Oak Ridge National Laboratory Distributed Active Archive Center (ORNL DAAC). 2007. MODIS subsetted land products, Collection 4. Available on-line [http://www.daac.ornl.gov/MODIS/modis.html] from ORNL DAAC, Oak Ridge, Tennessee, U.S.A..
 
 
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Last Updated: February 1, 2024