# Percent Cropped Area Project



# Update September 20, 2011 Marietta Echeverria R. David Jones Chuck Peck Andrew Shelby Shelly Thawley Nelson Thurman

1

# Overview

• Project Description 

# • Project Update • Next Steps

2

# Project Description

• Update to reflect latest USDA Census of 

# Agriculture data and National Land Cover Dataset

– National PCAs for corn, soybeans, wheat, cotton and total crop

– Regional (HUC-2) PCAs 

# • Develop PCAs for turf, orchard/vineyard, vegetable and rice * 

# • Consider using Hydrologic Unit Code- 10 (HUC- 10) or HUC- 12 

# • Incorporate Drinking Water catchment data when available * Implementation is under consideration 3

# Project Description

• Distinguishing HUC sizes 

# • HUC-8 2,267 subbasins avg. 703 sq. miles (450,000 acres) • HUC- 10 22,000 watersheds 40,000-250,000 acres • HUC- 12 160,000 watersheds 3,000-40,000 acres HUC-8

HUC- 10 

## HUC- 12
4

# Sample Corn PCA – Eastern Nebraska Red Polygons – HUC-8 watersheds Blue Text – HUC-8 area (km 2

### ) 

### Multi-colored polygons – counties Black text – Corn area in county (km 2

### ) Brown pixels – NLCD Agriculture pixels Purple text – Corn PCA

5

# Project Update

• Completed

– Draft PCAs have been determined for HUC-8, 10 and 12 watersheds for all new and established crop groups in all HUC-2 Regions

– QA using modeling results and monitoring data 

# • In progress

– QA of GIS methods

– QA using aerial photography

– Crop group aggregation

– Revision to PCA guidance
6

# Maximum PCA by crop group Crop Group HUC-8 HUC-10 HUC-12 Corn 60.9% 65.5% 79.5% Cotton 33.1% 51.4% 65.4% Orchard/Vineyard 23.4% 39.7% 47.5% Rice 20.8% 36.4% 42.5% Soybean 46.1% 54.1% 77.5% Vegetable 29.2% 39.5% 63.7% Wheat 38.1% 51.0% 58.8% Turf* 45.2% 61.8% 72.6% Total Crop** 90.5% 95.3% 100.0% * Does not include sod farms ** Does not include turf 7

# HUC-2 Watersheds

8HUC02 Corn Cotton Orchard/ Vineyard Rice Soybean Vegetable Wheat Turf Total Crop 01 1.8% 0.0% 0.3% 0.0% 0.0% 3.2% 0.0% 23.7% 12.5% 02 19.7% 1.6% 1.3% 0.0% 13.6% 3.2% 6.2% 39.1% 34.3% 03 9.2% 13.8% 15.3% 0.4% 12.6% 7.2% 4.4% 31.3% 41.3% 04 31.0% 0.0% 3.8% 0.0% 38.4% 5.2% 11.3% 45.2% 80.6% 05 45.5% 0.2% 1.7% 0.0% 33.5% 0.5% 8.4% 21.6% 80.9% 06 13.7% 5.4% 0.5% 0.0% 11.3% 0.3% 2.9% 14.4% 35.1% 07 60.9% 0.0% 0.1% 0.0% 35.0% 3.7% 12.3% 42.2% 87.8% 08 29.9% 23.1% 0.3% 19.4% 46.1% 1.3% 15.2% 34.6% 86.1% 09 36.6% 0.0% 0.0% 0.0% 34.1% 3.1% 33.2% 9.0% 90.5% 10 56.3% 0.0% 0.7% 0.0% 34.0% 0.4% 34.0% 14.7% 87.3% 11 18.5% 10.4% 1.9% 17.5% 24.7% 0.5% 38.1% 12.4% 74.9% 12 13.9% 33.1% 1.4% 3.5% 1.1% 1.9% 18.1% 34.3% 68.6% 13 2.5% 3.0% 1.9% 0.0% 0.1% 2.5% 4.0% 5.4% 44.2% 14 2.0% 0.0% 0.2% 0.0% 0.0% 0.4% 5.0% 2.1% 13.2% 15 0.9% 4.6% 1.5% 0.0% 0.0% 8.6% 3.5% 14.7% 18.9% 16 1.1% 0.0% 0.5% 0.0% 0.0% 0.4% 6.2% 15.2% 25.3% 17 8.5% 0.0% 4.7% 0.0% 0.0% 6.4% 29.2% 28.7% 65.8% 18 7.9% 7.1% 23.4% 20.8% 0.0% 29.2% 5.6% 39.7% 60.8%



# HUC-8 PCAs

9

# HUC- 10 PCAs HUC02 Corn Cotton Orchard/ Vineyard Rice Soybean Vegetable Wheat Turf Total Crop 01 6.6% 0.0% 0.6% 0.0% 0.1% 5.0% 0.1% 39.2% 19.7% 02 33.6% 3.7% 5.8% 0.0% 22.9% 6.6% 14.8% 55.3% 48.9% 03 20.9% 26.3% 25.1% 2.1% 26.8% 14.7% 13.0% 53.0% 93.6% 04 40.7% 0.0% 9.0% 0.0% 47.3% 9.1% 12.2% 61.8% 89.9% 05 56.9% 0.5% 3.2% 0.0% 41.6% 1.9% 11.3% 52.8% 92.5% 06 27.4% 10.9% 3.0% 0.0% 21.2% 0.9% 5.7% 30.7% 56.8% 07 71.0% 0.4% 0.7% 0.2% 50.9% 15.8% 23.5% 51.0% 92.9% 08 38.1% 36.2% 0.6% 29.6% 54.1% 3.0% 18.3% 55.6% 93.8% 09 41.8% 0.0% 0.0% 0.0% 39.2% 4.9% 41.8% 32.2% 95.3% 10 65.5% 0.0% 2.3% 0.0% 38.9% 2.1% 51.0% 51.7% 94.7% 11 26.6% 20.3% 2.9% 36.0% 38.0% 2.0% 46.6% 32.3% 87.8% 12 28.0% 51.4% 3.8% 7.3% 3.4% 4.7% 30.9% 48.2% 84.0% 13 3.0% 5.3% 6.5% 0.0% 0.1% 14.5% 12.5% 25.4% 44.2% 14 7.1% 0.0% 0.7% 0.0% 0.0% 3.1% 8.9% 13.1% 23.4% 15 1.9% 8.1% 5.6% 0.0% 0.0% 27.3% 11.0% 27.5% 53.1% 16 3.1% 0.0% 2.2% 0.0% 0.0% 1.0% 10.8% 18.2% 40.2% 17 21.6% 0.0% 18.7% 0.0% 0.0% 14.6% 41.5% 44.1% 92.2% 18 14.0% 21.7% 39.7% 36.4% 0.0% 39.5% 8.2% 51.5% 93.9% 10

# HUC- 12 PCAs HUC02 Corn Cotton Orchard/ Vineyard Rice Soybean Vegetable Wheat Turf Total Crop 01 16.8% 0.0% 2.3% 0.0% 0.1% 11.3% 0.1% 45.6% 45.0% 02 39.9% 6.2% 6.7% 0.0% 28.2% 9.6% 18.2% 65.7% 68.9% 03 30.8% 32.8% 47.5% 2.1% 40.8% 37.1% 19.7% 72.6% 93.6% 04 49.6% 0.0% 11.1% 0.0% 50.2% 18.6% 13.5% 71.8% 94.2% 05 64.6% 0.9% 4.7% 0.0% 48.9% 2.8% 16.5% 68.5% 95.3% 06 36.6% 30.5% 5.0% 0.0% 22.5% 2.1% 8.6% 59.9% 60.0% 07 79.5% 1.1% 1.5% 0.4% 77.5% 20.4% 30.7% 68.1% 96.0% 08 43.1% 47.0% 1.5% 42.5% 58.4% 4.3% 20.7% 57.2% 96.0% 09 45.9% 0.0% 0.0% 0.0% 40.4% 5.0% 44.5% 35.5% 100.0% 10 73.7% 0.0% 3.0% 0.0% 47.9% 2.5% 61.0% 61.4% 97.0% 11 39.1% 34.7% 10.3% 41.6% 44.0% 12.7% 57.5% 51.8% 94.4% 12 33.6% 65.4% 6.3% 14.8% 5.3% 4.7% 44.8% 54.8% 96.8% 13 8.5% 16.9% 11.7% 0.0% 0.1% 38.0% 14.8% 43.3% 66.1% 14 14.1% 0.0% 3.3% 0.0% 0.0% 10.8% 16.3% 20.3% 51.4% 15 5.9% 20.6% 7.2% 0.0% 0.0% 27.3% 11.4% 49.3% 62.7% 16 6.3% 0.0% 4.5% 0.0% 0.0% 2.3% 17.6% 44.8% 66.0% 17 30.0% 0.0% 33.0% 0.0% 0.0% 19.3% 58.8% 50.4% 97.2% 18 18.1% 21.9% 46.1% 37.6% 0.0% 63.7% 10.6% 62.8% 94.4% 11

# Monitoring vs. Modeling QA Corn Cotton Orchard/Vineya rd Rice Soybean 

## Fipronil Fluometuron Oryzalin Molinate Imazaquin Atrazine Dicrotovos Phosmet Thiobencarb Bentazon Acetochlor Cypermethrin Bromacil Bensulfuron 

## methyal Acifluoren Vegetable Wheat Turf All Cropland 

## Linuron Bromoxynil Iprodione Chlorthalonil DCPA MCPA Triclopyr Diazinon Cycloate Picloram

12

# QA using aerial photography

• ImageConnect is being used to QA maximum 

# PCAs in each region and for each crop group • It has also been used to QA anomalous results influenced by the incorporation of surface 

# water or country boundaries.

13

# Crop Group Aggregation
• Combination PCAs are being made for each crop combination

• Individual maximum PCAs are not additive and can only be aggregated at the watershed level Grain combinations Turf combinations Other 

## Corn -Soybeans Turf-Corn VegetableOrchard/Vineyard Corn-Wheat Turf-Cotton Rice-Vegetable Corn-Cotton TurfOrchard/Vineyard Rice-Cotton Soybeans-Wheat Turf- Rice Soybeans-Cotton Turf-Soybean Wheat-Cotton Turf-Vegetable Corn-Soybeans

## Wheat Turf-Wheat

14

# Next Steps

• QA of GIS methods and results 

# • Finalization of associated guidance document

15