Agricultural Subsurface Drainage USGS Staff: Nancy Baker, Wes Stone GIS Contact: Michael Wieczorek.
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Transcript of Agricultural Subsurface Drainage USGS Staff: Nancy Baker, Wes Stone GIS Contact: Michael Wieczorek.
Agricultural Subsurface Drainage
USGS Staff: Nancy Baker, Wes StoneGIS Contact: Michael Wieczorek
1. It is impossible to identify the exact location of subsurface drains in the conterminous U.S. (Sugg, Jayne, Naz, Brown)
2. The primary goal is to provide an estimate of the probable percent of agricultural land that may have subsurface drains to facilitate cropping at a National scale (CONUS).
3. This is an exploratory exercise at this point and will build of the work of others as well as incorporate input from various Federal Agencies and Universities.
4. No previous work has been done on the National scale (CONUS) or with the most recent available data at the National scale (SSURGO, CDL, NLCD).
Researchers Land Use Data Soils Data Comments
Jaynes and James, 2004 NLCD, 1992 STATSGODrainage classes,Hydrologic Groups,Land Capability Class
Slope was also included in the analysis23 States in the MidWest and East
Sugg, 2007 NLCD, 1992 STATSGODrainage classes,Hydrologic Groups
Final estimates used drainage class onlyMidWestern Corn belt only
Naz et al, 2009 NLCD, 1992 STATSGODrainage classes
Slope was also included in the analysisHoagland Watershed, IN only
Brown, 2009 NLCD, 2001 SSURGODrainage classes,Hydrologic Groups,Land Capability Class
Slope was also included in the analysisCentral Minnesota only
1. The exact locations of tile drains are incomplete or unknown.2. If row crops are cultivated on poorly drained soils, then artificial drainage likely
exists.3. 1992 remains the most recent complete data set at the county level for CONUS for
Tile Drains.4. No method exists for distinguishing between surface and subsurface drainage.5. No study has been done at the National level (CONUS) or with new data sets
(SSURGO, CDL, NLCD).6. Further exploration may lead to different approaches for different areas as well as
incorporating other data sets.
1. 1992 NRI2. Hydrologic Group3. Drainage Class4. Water Table Depth April June Minimum5. Available Water Storage 0 - 25 cm6. Soil Restrictive layer7. NLCD 20118. Crop Land Data Layer 2013
Approaches/Data Sources
Comparison of Suggs 1992 NRI vs USGS 1992 NRI
Hydrologic Groups and Water Table Depth during April – June ( 100 cm or less)Source Data: SSURGO
Drainage Classes and Soil Restrictive layer ( 25 cm or less)Source Data: SSURGO
Comparison of Hydrologic Groups and USGS 1992 NRI
Comparison of Water table Depth and USGS 1992 NRI
Comparison of Drainage Classes and USGS 1992 NRI
Comparison of Soil Restrictive Layer (25cm) and USGS 1992 NRI
COUNT AG HydGrp SRL25AG DrainageClass WTDEP TILES PCT
43147 1 3 0 1 1 1 53.29883
10587 1 3 0 1 0 1 13.07796
3453 1 3 0 0 1 1 4.265438
677 1 3 0 0 0 1 0.836288
617 1 3 1 1 0 1 0.762171
4589 1 3 1 1 1 1 5.668721
85 1 3 1 0 0 1 0.104999
516 1 3 1 0 1 1 0.637407
5068 1 2 0 0 1 1 6.260423
2550 1 2 0 0 0 1 3.149976
360 1 2 0 1 1 1 0.444702
403 1 2 0 1 0 1 0.49782
61 1 2 1 0 1 1 0.075352
233 1 2 1 0 0 1 0.287821
19 1 2 1 1 0 1 0.02347
13 1 2 1 1 1 1 0.016059
3882 1 1 0 0 1 1 4.795375
2938 1 1 0 0 0 1 3.629266
470 1 1 0 1 0 1 0.580584
966 1 1 0 1 1 1 1.193285
27 1 1 1 0 1 1 0.033353
10 1 1 1 1 0 1 0.012353
11 1 1 1 1 1 1 0.013588
18 1 1 1 0 0 1 0.022235
134 1 0 0 0 1 1 0.165528
89 1 0 0 0 0 1 0.10994
6 1 0 0 1 1 1 0.007412
2 1 0 1 0 0 1 0.002471
17 1 0 1 0 1 1 0.021
2 1 0 1 1 1 1 0.002471
1 1 0 0 1 0 1 0.001235
2 1 0 1 1 0 1 0.002471
80953 100
Leary-Weber Ditch, IN
Blue = Ag land and NRI 1992 Tiles 100%
Brown = All other areas
COUNT TLES100PCT AG HGDOM PCT
80105985 0 0 0
20524670 0 0 1
46669727 0 1 0
47800312 0 1 1
2207636 1 1 0 29.00647
4576273 1 1 1 60.12836
398839 1 0 0 5.240407
428092 1 0 1 5.624767
7610840
TILES100PCT 1 = 100% NRI92, 0 = not
AG 1 = cropland and , 0 = not
HGDOM 1 = COMBO, 0 = not
COUNT AG andTile wtdep < 100 cm hydgrp pct
4998098 1 1 3 65.67
2383244 1 1 2 31.31
150034 1 1 1 1.97
29194 1 0 2 0.38
25421 1 1 0 0.33
18582 1 0 1 0.24
6267 1 0 3 0.08
7610840
AG andTile
1 = cropland and 100% tile (92NRI), 0 = not
wtdep < 100 cm
1 = SSURGO water table during Apr-May-June < 100 cm
hydgrp
1 = AorB, 2 = CorD, 3 = any COMBO
Questions?