Soil Data Explorer - DURHAM

Official Series Description

Lab Data Summary

Aggregate lab data for the DURHAM soil series. This aggregation is based on all pedons with a current taxon name of DURHAM, and applied along 1-cm thick depth slices. Solid lines are the slice-wise median, bounded on either side by the interval defined by the slice-wise 5th and 95th percentiles. The median is the value that splits the data in half. Five percent of the data are less than the 5th percentile, and five percent of the data are greater than the 95th percentile. Values along the right hand side y-axis describe the proportion of pedon data that contribute to aggregate values at this depth. For example, a value of "90%" at 25cm means that 90% of the pedons correlated to DURHAM were used in the calculation. Source: KSSL snapshot (updated 2020-03-13). Methods used to assemble the KSSL snapshot used by SoilWeb / SDE

There are insufficient data to create the lab data summary figure.

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the DURHAM soil series. Monthly precipitation (PPT) and potential evapotranspiration (PET) have been estimated from the 50th percentile of gridded values (PRISM 1981-2010) overlapping with the extent of SSURGO map units containing each series as a major component. Monthly PET values were estimated using the method of Thornthwaite (1948). These (and other) climatic parameters are calculated with each SSURGO refresh and provided by the fetchOSD function of the soilDB package. Representative water storage values (“AWC” in the figures) were derived from SSURGO by taking the 50th percentile of profile-total water storage (sum[awc_r * horizon thickness]) for each soil series. Note that this representation of “water storage” is based on the average ability of most plants to extract soil water between 15 bar (“permanent wilting point”) and 1/3 bar (“field capacity”) matric potential. Soil moisture state can be roughly interpreted as “dry” when storage is depleted, “moist” when storage is between 0mm and AWC, and “wet” when there is a surplus. Clearly there are a lot of assumptions baked into this kind of monthly water balance. This is still a work in progress.

Sibling Summary

Siblings are those soil series that occur together in map units, in this case with the DURHAM series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-02-21), parsed OSD records (updated 2023-10-02) and snapshot of SC database (updated 2023-10-02).

Select annual climate data summaries for the DURHAM series and siblings. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data (updated 2023-10-09).

Geomorphic description summaries for the DURHAM series and siblings. Series are sorted according to hierarchical clustering of proportions and relative hydrologic position within an idealized landform (e.g. top to bottom). Most soil series (SSURGO components) are associated with a hillslope position and one or more landform-specific positions: hills, mountain slopes, terraces, and/or flats. Proportions can be interpreted as an aggregate representation of geomorphic membership. The values printed to the left (number of component records) and right (Shannon entropy) of stacked bars can be used to judge the reliability of trends. Small Shannon entropy values suggest relatively consistent geomorphic association, while larger values suggest lack thereof. Source: SSURGO component records (updated 2023-10-04).

There are insufficient data to create the 3D mountains figure.

Competing Series

Soil series competing with DURHAM share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2023-10-02) and snapshot of the SC database (updated 2023-10-02).

Select annual climate data summaries for the DURHAM series and competing. Series are sorted according to hierarchical clustering of median values. Source: SSURGO map unit geometry and 1981-2010, 800m PRISM data (updated 2023-10-09).

Geomorphic description summaries for the DURHAM series and competing. Series are sorted according to hierarchical clustering of proportions and relative hydrologic position within an idealized landform (e.g. top to bottom). Proportions can be interpreted as an aggregate representation of geomorphic membership. Most soil series (SSURGO components) are associated with a hillslope position and one or more landform-specific positions: hills, mountain slopes, terraces, and/or flats. The values printed to the left (number of component records) and right (Shannon entropy) of stacked bars can be used to judge the reliability of trends. Shannon entropy values close to 0 represent soil series with relatively consistent geomorphic association, while values close to 1 suggest lack thereof. Source: SSURGO component records (updated 2023-10-04).

There are insufficient data to create the 3D flats position figure.

Soil series sharing subgroup-level classification with DURHAM, arranged according to family differentiae. Hovering over a series name will print full classification and a small sketch from the OSD. Source: snapshot of SC database (updated 2023-10-02).

Block Diagrams

Click a link below to display the diagram. Note that these diagrams may be from multiple survey areas.

1. AL-2012-04-24-14 | Chambers County - June 1959

   Soil associations of Chambers County, Alabama (Soil Survey of Chambers County, Alabama; June 1959).

Map Units

Map units containing DURHAM as a major component. Limited to 250 records.

Map Unit Name	Symbol	Map Unit Area (ac)	Map Unit Key	National Map Unit Symbol	Soil Survey Area	Publication Date	Map Scale
Durham sandy loam, gently sloping	DdB	464	122717	43pm	al017	1957	1:20000
Durham sandy loam, sloping	DdC	152	122718	43pn	al017	1957	1:20000
Durham sandy loam	Db	351	329250	c1lz	al051	1948	1:20000
Durham sandy loam, 1 to 6 percent slopes	14	2040	330195	c2lg	al081	1979	1:20000
Durham sandy loam, 2 to 6 percent slopes	DiB	900	124191	4575	ga067	1969	1:15840
Durham loamy coarse sand, thin solum, 2 to 6 percent slopes	DoB	636	124588	45mz	ga147	1961	1:20000
Durham loamy coarse sand, thin solum, 0 to 2 percent slopes	DoA	270	124587	45my	ga147	1961	1:20000
Durham loamy coarse sand, 2 to 6 percent slopes	DjB	2260	125026	4633	ga297	1962	1:15840
Durham loamy coarse sand, 0 to 2 percent slopes	DjA	150	125025	4632	ga297	1962	1:15840
Durham loamy sand, 2 to 8 percent slopes	DuB	1974	113584	3t60	nc105	1982	1:24000
Durham loamy sand, 1 to 6 percent slopes	DuB	1268	117672	3yfw	nc181	1977	1:20000
Durham loamy sand, 2 to 6 percent slopes	DuB	715	1154999	17rw1	sc001	1976	1:20000
Durham sandy loam, 2 to 6 percent slopes	DuB	1381	131800	4f4m	sc007	1975	1:20000
Durham loamy sand, 2 to 6 percent slopes	DuB	265	132187	4fk3	sc023	1977	1:20000
Durham loamy sand, 2 to 6 percent slopes	DuB	2013	129843	4c3h	sc037	1978	1:20000
Durham loamy sand, 2 to 6 percent slopes	DuB	410	129908	4c5l	sc039	1977	1:20000
Durham loamy sand, 2 to 6 percent slopes	DuB	465	132478	4fvh	sc045	1972	1:20000
Durham loamy sand, 2 to 6 percent slopes	DuB	1605	130043	4c9y	sc047	1973	1:20000
Durham loamy sand, 2 to 6 percent slopes	DvB	1349	130271	4ck9	sc057	1967	1:20000
Durham loamy sand, 2 to 6 percent slopes, eroded	DvB2	852	130272	4ckb	sc057	1967	1:20000
Durham loamy sand, 6 to 10 percent slopes, eroded	DvC2	706	130273	4ckc	sc057	1967	1:20000
Durham loamy sand, 2 to 6 percent slopes	DuB	595	2395765	2ldzr	sc057	1967	1:20000
Durham loamy sand, 6 to 10 percent slopes	DuC	330	2395766	2ldzs	sc057	1967	1:20000
Durham sandy loam, 2 to 6 percent slopes	DvB	1514	130366	4cnc	sc059	1970	1:20000
Durham sandy loam, 6 to 10 percent slopes	DvC	1155	130367	4cnd	sc059	1970	1:20000
Durham loamy sand, 2 to 6 percent slopes	DuB	679	130365	4cnb	sc059	1970	1:20000
Durham sandy loam, 2 to 6 percent slopes	DuB	3598	131170	4dh9	sc081	1960	1:20000
Durham sandy loam, 2 to 6 percent slopes	DvB	2936	131470	4dsz	sc087	1970	1:20000
Durham sandy loam, 6 to 10 percent slopes	DvC	2214	131471	4dt0	sc087	1970	1:20000
Durham loamy sand, 2 to 6 percent slopes	DuB	90	1404822	1j4tv	sc087	1970	1:20000
Durham loamy sand, 2 to 6 percent slopes	DuB	3410	130191	4cgq	sc610	1985	1:20000
Durham loamy sand, 6 to 10 percent slopes	DuC	3032	130192	4cgr	sc610	1985	1:20000
Durham-Bourne fine sandy loams, 2 to 6 percent slopes	45B	462	118905	3zqn	va041	1974	1:15840
Durham fine sandy loam, undulating phase	Da	205	121778	42qb	va065	1950	1:15840
Durham fine sandy loam, 2 to 5 percent slopes	DuB	2284	119362	406d	va109	1972	1:15840
Durham coarse sandy loam, undulating phase	Da	4997	121880	42tm	va135	1956	1:20000
Durham fine sandy loam, undulating phase	Dc	3058	121882	42tp	va135	1956	1:20000
Durham coarse sandy loam, rolling phase	Db	573	121881	42tn	va135	1956	1:20000
Durham fine sandy loam, rolling phase	Dd	227	121883	42tq	va135	1956	1:20000
Durham sandy loam, undulating phase	Da	987	120251	4142	va147	1950	1:20000
Durham-Bourne-Urban land complex, 2 to 6 percent slopes	15B	9	139985	4pnn	va760	2004	1:24000

Map of Series Extent

Approximate geographic distribution of the DURHAM soil series. To learn more about how this distribution was mapped, or to compare this soil series extent to others, use the Series Extent Explorer (SEE) application. Source: generalization of SSURGO geometry (updated 2023-10-04).