Soil Data Explorer - ROANOKE

Official Series Description

Lab Data Summary

Aggregate lab data for the ROANOKE soil series. This aggregation is based on all pedons with a current taxon name of ROANOKE, 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 ROANOKE were used in the calculation. Source: KSSL snapshot (updated 2020-03-13). Methods used to assemble the KSSL snapshot used by SoilWeb / SDE

Pedons used in the lab summary:

MLRA	Lab ID	Pedon ID	Taxonname	CI	NSSL / NASIS Reports	Link To SoilWeb GMap
133A	VPI0272	V1984-VA081-272	Roanoke	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	36.6357918,-77.433197
133A	VPI0273	V1984-VA081-273	Roanoke	3	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	36.5673409,-77.539238

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the ROANOKE 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 ROANOKE 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 ROANOKE 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 ROANOKE 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 ROANOKE 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 ROANOKE 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 ROANOKE 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 2D hillslope position figure.

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

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

Soil series sharing subgroup-level classification with ROANOKE, 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. NC-2012-02-07-39 | Polk County - 1998

   The relationship between soils, landscape, and parent material in the Riverview-Chewacla-Buncombe general soil map unit. The Buncombe soils are in convex areas adjacent to the stream channel; the Chewacla soils are in the lower, concave areas further from the channel; and the Riverview soils occur in the remaining areas of the flood plain. The clayey Masada, Dogue, and Roanoke soils are on the higher stream terraces (Soil Survey of Polk County, North Carolina; 1998).

Map Units

Map units containing ROANOKE 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
Roanoke complex	Ro	7570	328086	c0df	al001	1972	1:20000
Roanoke silt loam	Ro	1930	122793	43s2	al027	1971	1:20000
Roanoke silt loam	Rd	5407	329287	c1n5	al051	1948	1:20000
Roanoke silt loam, 0 to 1 percent slopes, occasionally flooded	RyA	1391	330490	c2wz	al087	1997	1:24000
Roanoke silt loam, 0 to 1 percent slope, occasionally flooded	Rb	8091	330950	2z476	al101	1958	1:20000
Roanoke silt loam	Ra	245	122874	43vp	al111	1965	1:15840
Roanoke silt loam	Ron	1073	124219	4582	ga067	1969	1:15840
Roanoke fine sandy loam	Roa	140	124548	45lp	ga137	1960	1:20000
Chewacla-Roanoke complex, 0 to 1 percent slopes, ponded	Cr	1095	126946	4831	ga159	1997	1:24000
Roanoke silt loam, 0 to 2 percent slopes, frequently flooded	Rk	370	126977	4841	ga159	1997	1:24000
Roanoke silt loam	Ron	915	124740	45sw	ga199	1960	1:15840
Roanoke loam	Rr	1980	324904	bx2s	ga245	1979	1:15840
Wehadkee and Roanoke silty clay loams	Wer	3795	124992	4620	ga255	1962	1:15840
Roanoke and Augusta sandy loams	Rol	320	124990	461y	ga255	1962	1:15840
Roanoke silt loam	Rn	9985	531289	ktvc	ga621	1975	1:20000
Roanoke silt loam	Ro	1730	125575	46nt	ga628	1977	1:20000
Roanoke silty clay loam, overwash	Ro	3445	125629	46qk	ga629	1976	1:20000
Roanoke silt loam, occasionally flooded	Ro	490	127119	488m	ga645	1995	1:12000
Roanoke silt loam, frequently flooded	Rk	2040	127381	48k2	ga649	1992	1:12000
Roanoke loam, 0 to 2 percent slopes, rarely flooded	RoA	168	114556	3v6c	nc007	1999	1:24000
Roanoke fine sandy loam	Ro	44433	111599	3r3z	nc013	1986	1:24000
Roanoke fine sandy loam, frequently flooded	Ro	31720	111459	3qzg	nc015	1984	1:24000
Roanoke loam	Ro	10451	115513	3w67	nc017	1983	1:24000
Roanoke silt loam, 0 to 2 percent slopes	RoA	13089	111791	3rb5	nc029	1988	1:24000
Roanoke loam	Ro	1519	115620	3w9p	nc031	1984	1:24000
Roanoke loam, 0 to 2 percent slopes, occasionally flooded	RkA	654	2431428	2mm35	nc035	1969	1:15840
Roanoke silt loam	Ro	20111	811399	w7b5	nc041	1982	1:24000
Roanoke fine sandy loam	Ro	1608	115777	3wgr	nc049	1984	1:24000
Roanoke and Warne soils, 0 to 2 percent slopes, occasionally flooded	Ro	17977	811142	w71w	nc051	1981	1:24000
Roanoke-Urban land complex	Ru	1293	811143	w71x	nc051	1981	1:24000
Roanoke fine sandy loam	Ro	28496	112128	3rp1	nc053	1980	1:20000
Roanoke loam, 0 to 2 percent slopes, occasionally flooded	RwA	151	112287	3rv5	nc059	1988	1:24000
Roanoke silt loam, 0 to 2 percent slopes, occasionally flooded	Ro	1090	2450765	2n86y	nc063	1971	1:15840
Roanoke loam	Ro	30409	1015689	132x5	nc065	1976	1:20000
Roanoke-Warne complex, 0 to 3 percent slopes, occasionally flooded	RoA	1259	2441663	2myrb	nc069	1997	1:24000
Roanoke loam, 0 to 2 percent slopes	RoA	2668	115948	3wn8	nc073	1990	1:24000
Roanoke loam, 0 to 2 percent slopes, occasionally flooded	RoA	12558	113058	3sn1	nc083	1995	1:24000
Roanoke loam, occasionally flooded	Ro	15556	113132	3sqf	nc085	1984	1:24000
Roanoke loam	Ro	1852	113172	3srq	nc091	1981	1:24000
Roanoke loam, 0 to 2 percent slopes, occasionally flooded	Ro	3157	113555	3t52	nc101	1986	1:24000
Roanoke silt loam, 0 to 2 percent slopes, occasionally flooded	Ro	1025	2442020	2mz3v	nc105	1982	1:24000
Roanoke loam, frequently flooded	Ro	1569	111139	3qn4	nc117	1985	1:24000
Roanoke silt loam, 0 to 2 percent slopes, occasionally flooded	Ro	2778	114061	3tpd	nc131	1988	1:24000
Roanoke silt loam	Ro	44011	811436	w7cc	nc143	1982	1:24000
Roanoke silt loam	Ro	10574	114344	3tzj	nc147	1969	1:15840
Dorian-Roanoke complex, 0 to 6 percent slopes, rarely flooded	DoB	3206	2441664	2myrc	nc149	1992	1:24000
Roanoke loam	Ro	642	115072	3vr0	nc163	1982	1:24000
Roanoke loam, rarely flooded	Ro	1882	115258	3vy0	nc177	1985	1:24000
Roanoke loam, 0 to 2 percent slopes, occasionally flooded	RoA	314	2538641	2qqm1	nc183	1966	1:24000
Roanoke loam	Ro	16345	116216	3wxx	nc187	1979	1:24000
Roanoke loam, 0 to 2 percent slopes, occasionally flooded	Ro	1095	116445	3x59	nc195	1980	1:24000
Roanoke loam	Rd	548	525197	kmhv	tn059	1954	1:15840
Roanoke fine sandy loam, 0 to 2 percent slopes, rarely flooded	17A	2007	118110	3yx0	va007	1994	1:24000
Tomotley-Roanoke complex, 0 to 2 percent slopes, rarely flooded	26A	6235	121051	41yw	va033	1996	1:24000
Roanoke loam, 0 to 2 percent slopes, ponded	19A	665	121045	41yp	va033	1996	1:24000
Roanoke silt loam, 0 to 2 percent slopes	40A	2233	117901	3yp8	va036	1993	1:24000
Roanoke silt loam	Ro	1256	118778	3zlk	va037	1970	1:15840
Roanoke loam	137	1467	118827	3zn4	va041	1974	1:15840
Roanoke silt loam	Rb	154	121830	42s0	va065	1950	1:15840
Roanoke silt loam	33	271	119025	3zvj	va075	1976	1:15840
Roanoke loam, 0 to 2 percent slopes, frequently flooded	31A	28921	695368	rbl7	va081	1986	1:15840
Roanoke silt loam, 0 to 2 percent slopes, ponded	32A	11053	695369	rbl8	va081	1986	1:15840
Roanoke silt loam	Ro	1403	119275	403l	va087	1973	1:15840
Roanoke loam, 0 to 2 percent slopes, rarely flooded	13A	676	118530	3zbk	va097	1995	1:24000
Roanoke silt loam, 0 to 2 percent slopes	24A	3357	694726	r9xj	va101	1995	1:15840
Roanoke silt loam, local alluvium, 2 to 7 percent slopes	RoB	1000	119412	4080	va109	1972	1:15840
Roanoke silt loam	Rk	236	517042	kc0s	va113	1967	1:15840
Roanoke silt loam, 0 to 2 percent slopes	31A	1842	119687	40jw	va127	1985	1:15840
Roanoke silt loam	Ra	363	120286	4156	va147	1950	1:20000
Roanoke silt loam	Re	135	517460	kcg8	va157	1958	1:20000
Roanoke loam, 0 to 2 percent slopes, occasionally flooded	23A	12830	705287	rnx6	va175	1996	1:24000
Roanoke silt loam, 0 to 2 percent slopes	Ro	2470	120553	41ft	va179	1970	1:15840
Roanoke loam, 0 to 2 percent slopes, frequently flooded	22A	18426	1723102	1vv0y	va183	2006	1:24000
Roanoke silt loam, local alluvium	Ro	425	120758	41nf	va631	1973	1:15840
Roanoke loam, 0 to 2 percent slopes, occasionally flooded	16A	26965	2481800	2p9j2	va653	1991	1:24000
Roanoke silt loam, 0 to 2 percent slopes	31A	1808	140111	4psq	va760	2004	1:24000
Roanoke-Chewacla complex, 0 to 2 percent slopes, frequently flooded	32A	568	140026	4ppz	va760	2004	1:24000

Map of Series Extent

Approximate geographic distribution of the ROANOKE 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).