Soil Data Explorer - STEWVAL

Official Series Description

Lab Data Summary

Aggregate lab data for the STEWVAL soil series. This aggregation is based on all pedons with a current taxon name of STEWVAL, 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 STEWVAL 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 STEWVAL 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 STEWVAL 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 STEWVAL 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 STEWVAL 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 flats position figure.

Competing Series

Soil series competing with STEWVAL 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 STEWVAL 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 STEWVAL 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 terrace figure.

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

Soil series sharing subgroup-level classification with STEWVAL, 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

No block diagrams are available.

Map Units

Map units containing STEWVAL 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
Bellehelen-Brier-Stewval association	660ec	140	2390636	2v43b	ca763	1984	1:24000
Stewval-Rock outcrop association	SR	3582	643375	2s21j	nv611	1967	1:24000
Stewval-Lomoine-Rock outcrop association	SLR	1662	645090	2s231	nv611	1967	1:24000
Vinini-Stewval-Gabbvally association	VSG	7218	495665	2v41f	nv622	1972	1:24000
Stewval-Gabbvally-Rock outcrop association	2129	9018	2480711	2p8cy	nv713	2014	1:24000
Gabbvally-Stewval-Rock outcrop association	1998	1392	2480685	2s234	nv713	2014	1:24000
Stewval-Gabbvally association	2010	350	2480688	2s228	nv713	2014	1:24000
Stewval-Lomoine-Rock outcrop association	2011	99	2480689	2s231	nv713	2014	1:24000
Stewval-Gabbvally association	2010	69190	478180	2s228	nv754	1992	1:24000
Stewval-Lomoine-Rock outcrop association	2011	36435	478181	2s231	nv754	1992	1:24000
Stewval-Gabbvally-Rock outcrop association	2129	3464	2484099	2pcx7	nv754	1992	1:24000
Gabbvally-Stewval-Rock outcrop association	1998	2980	2484087	2s234	nv754	1992	1:24000
Stewval-Eastwell association	70	5176	478194	j1lm	nv766	1994	1:24000
Stewval-Wala-Rock outcrop association	71	3441	478195	j1ln	nv766	1994	1:24000
Stewval very gravelly fine sandy loam, 8 to 30 percent slopes	80	1820	478196	j1lp	nv766	1994	1:24000
Downeyville-Stewval-Blacktop association	1010	8119	476378	2s219	nv770	1995	1:24000
Stewval, very steep-Stewval-Gabbvally association	4154	32199	476943	j098	nv774	1985	1:24000
Stewval-Gabbvally association	1362	29962	476767	2s228	nv774	1985	1:24000
Stewval very gravelly sandy loam, 8 to 50 percent slopes	4153	29173	476942	j097	nv774	1985	1:24000
Stewval-Lomoine association	4150	14222	476940	j095	nv774	1985	1:24000
Stewval-Kyler association	4155	12279	476944	2v42v	nv774	1985	1:24000
Stewval-Pintwater-Rock outcrop association	4152	10731	476941	2s229	nv774	1985	1:24000
Stewval-Gabbvally-Tejabe association	4159	9232	476947	j09d	nv774	1985	1:24000
Stewval-Beelem association	4156	8840	476945	2s21g	nv774	1985	1:24000
Stewval-Bellehelen-Rock outcrop association	4157	8618	476946	2s21h	nv774	1985	1:24000
Downeyville-Stewval-Rock outcrop association	4173	5357	476955	j09n	nv774	1985	1:24000
Downeyville-Stewval-Blacktop association	4178	5092	476960	2s219	nv774	1985	1:24000
Beelem-Bellehelen-Stewval association	6094	4769	477012	j0ch	nv774	1985	1:24000
Downeyville-Stewval-Mirkwood association	4174	3270	476956	j09p	nv774	1985	1:24000
Zadvar-Stewval association	4070	3134	476928	2s222	nv774	1985	1:24000
Stewval-Rock outcrop association	3223	7223	2215684	2s21j	nv778	2013	1:24000
Stewval-Bellehelen-Rock outcrop association	3226	1808	2215685	2dclq	nv778	2013	1:24000
Stewval-Gabbvally association	2301	622	2719031	2v3tg	nv778	2013	1:24000
Stewval-Tarnach association	3252	6582	480041	j3j6	nv779	2004	1:24000
Tarnach-Stewval association	4021	4032	480110	j3lf	nv779	2004	1:24000
Stewval-Bellehelen association	3254	3976	480043	j3j8	nv779	2004	1:24000
Stewval-Rock outcrop association	660	9049	480565	2s21j	nv780	1990	1:24000
Stewval-Maderbak-Atlow association	276	3975	480390	j3wg	nv780	1990	1:24000
Stewval-Rock outcrop association	1223	45885	480708	2s21j	nv781	1994	1:24000
Vinini-Stewval-Gabbvally association	1620	43101	480791	2v41f	nv781	1994	1:24000
Stewval-Bellehelen-Rock outcrop association	1226	40158	480709	2s21h	nv781	1994	1:24000
Stewval-Downeyville-Rock outcrop association	1227	35445	480710	2s22w	nv781	1994	1:24000
Schwalbe-Stewval-Bellehelen association	1050	17613	480672	j45k	nv781	1994	1:24000
Stewval-Beelem association	1220	16527	480705	2s21g	nv781	1994	1:24000
Downeyville-Stewval-Blacktop association	1833	10050	480819	2s219	nv781	1994	1:24000
Stewval-Downeyville-Gabbvally association	1222	9252	480707	j46p	nv781	1994	1:24000
Stewval-Gabbvally association	1100	4562	480680	2s228	nv781	1994	1:24000
Maggie-Stewval-Pintwater association	2081	1316	480843	2v41d	nv781	1994	1:24000
Zadvar-Stewval association	1464	586	480764	2s222	nv781	1994	1:24000
Stewval-Blacktop-Rock outcrop association	1221	341	480706	j46n	nv781	1994	1:24000
Stewval-Advokay-Itme association	1229	226	480711	2whm7	nv781	1994	1:24000
Stewval-Bellehelen-Rock outcrop association	3226	186611	480934	2s21h	nv783	1991	1:24000
Stewval-Rock outcrop association	3223	113578	480932	2s21j	nv783	1991	1:24000
Stewval-Beelem association	3220	75268	480930	2s21g	nv783	1991	1:24000
Stewval, moist-Rock outcrop association	3221	42575	480931	j4fx	nv783	1991	1:24000
Stewval-Gabbvally-Beelem association	3228	40090	480935	j4g1	nv783	1991	1:24000
Argalt-Stewval-Gabbvally association	3620	29584	481007	j4jc	nv783	1991	1:24000
Downeyville-Stewval association	3831	28777	481063	j4l5	nv783	1991	1:24000
Gabbvally-Stewval-Beelem association	3102	27426	480904	j4f1	nv783	1991	1:24000
Stewval-Beelem-Bellehelen association	3224	20694	480933	j4fz	nv783	1991	1:24000
Stewval-Gabbvally association	2301	217	1904567	2s228	nv783	1991	1:24000
Stewval-Gabbvally association	2301	1206	481195	2s228	nv784	2006	1:24000
Espint-Gabbvally-Stewval association	2682	2788	469194	hr79	nv785	1995	1:24000
Downeyville-Vindicator-Stewval association	2494	1741	469167	hr6f	nv785	1995	1:24000
Espint-Stewval-Vindicator association	2681	604	469193	hr78	nv785	1995	1:24000
Stewval-Pintwater-Rock outcrop association	231	54525	484958	2s229	nv796	1984	1:63360
Stewval-Downeyville-Rock outcrop association	230	36472	484957	2s22w	nv796	1984	1:63360
Stewval-Bellehelen-Gabbvally association	235	15026	484962	j8my	nv796	1984	1:63360
Stewval-Bellehelen-Rock outcrop association	234	13104	484961	2s21h	nv796	1984	1:63360
Stewval-Gabbvally association	237	12508	484964	2s228	nv796	1984	1:63360
Gabbvally-Bellehelen-Stewval association	651	6326	485107	j8sm	nv796	1984	1:63360
Bellehelen-Brier-Stewval association	660	6201	485114	2v43b	nv796	1984	1:63360
Malmesa-Stewval-Gabbvally association	680	5980	485116	j8sx	nv796	1984	1:63360
Stewval-Downeyville, moist-Rock outcrop association	236	4724	484963	j8mz	nv796	1984	1:63360
Tokoper-Stewval association	712	3263	485133	j8tg	nv796	1984	1:63360
Stewval-Blacktop-Rock outcrop association	233	2679	484960	j8mw	nv796	1984	1:63360
Gabbvally-Stewval-Vindicator association	650	1936	485106	j8sl	nv796	1984	1:63360
Stewval-Wahguyhe-Pintwater association	239	1898	484966	j8n2	nv796	1984	1:63360
Espint-Stewval-Vindicator association	571	1098	485086	2v429	nv796	1984	1:63360
Zadvar-Stewval association	200	869	484948	2s222	nv796	1984	1:63360
Stewval-Malmesa-Wahguyhe association	238	670	484965	j8n1	nv796	1984	1:63360
Stewval-Advokay-Itme association	232	403	484959	2whm7	nv796	1984	1:63360
Stewval-Kyler association	650	800	477673	2v42v	nv799	1991	1:24000

Map of Series Extent

Approximate geographic distribution of the STEWVAL 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).