Analysis Results

We performed analysis on two separate areas, the John Martin State Wildlife Area and the Lower Gunnison River between Grand Junction and Delta.

John Martin State Wildlife Area

The John Martin SWA is located around the John Martin Reservoir in Bent County. The land is mostly flat, with fairly good access. Much of the tamarisk has high density, making Aerial treatment possible for some areas. Here is a winter photo of the area showing some tamarisk in the foreground and in the water in the background:

Photo from Google Earth, taken by user 1krispy1.

The final prescription map is shown below. A more detailed view of the map can be seen by clicking here.

The final proposed treatment groups are composed of these polygons:
        Group 0: Aerial: 17 16 21 20 19 17 16 9 12 17 16 21 20 19 17 16
        Group 1: Aerial: 18 17 16
        Group 2: Aerial: 31
        Group 3: Aerial: 32 33 31
        Group 4: Mechanical: 3 37 34 35 36 22 24 25 26
        Group 5: Mechanical: 4 7 10 13 14 15 5 8 11
        Group 6: Mechanical: 6
        Group 7: Mechanical: 23
        Group 8: Mechanical: 27 28 29 30
        Group 9: Manual: 0
        Group 10: Manual: 1
        Group 11: Manual: 2
The program used 8 trial groupings to find this solution.

The program calculates the total treatment cost by multiplying the treatment area for each polygon by the treatment cost for the selected treatment. The unadjusted treatment cost is $11,676,764. Multiplying by the remoteness index for each polygon gives a scaled treatment cost of $11,893,358. Because the treatment area is very accessible, the adjusted treatment cost is not much more than the unadjusted treatment cost. The area assigned to each treatment type is shown below:

Treatment Type	Total Area
Aerial	2008 Acres
Mechanical	4608 Acres
Manual	142 Acres

A detailed look at the center of the treatment area is shown below, with the polygon numbers included.