Soil Data Explorer - SIMAS

Official Series Description

Lab Data Summary

Aggregate lab data for the SIMAS soil series. This aggregation is based on all pedons with a current taxon name of SIMAS, 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 SIMAS 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
10	74C0170	1974OR023002	Simas	6	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	44.4508324,-119.4049988
10	98P0243	97ORGCAO011	Simas	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	44.451339,-119.406113
10	74C0164	S1974OR065001	SIMAS	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	44.9217758,-120.5222244
10	99P0237	S1998OR069002	SIMAS	7	Primary | Supplementary | Taxonomy | Pedon | Water Retention | Correlation | Andic Soil Properties	44.9152794,-120.4397202

Water Balance

Monthly water balance estimated using a leaky-bucket style model for the SIMAS 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 SIMAS series. Sketches are arranged according to their subgroup-level taxonomic structure. Source: SSURGO snapshot (updated 2024-10-24), parsed OSD records (updated 2024-10-23) and snapshot of SC database (updated 2024-10-23).

Select annual climate data summaries for the SIMAS 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 2024-10-23).

Geomorphic description summaries for the SIMAS 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 2024-10-23).

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

Competing Series

Soil series competing with SIMAS share the same family level classification in Soil Taxonomy. Source: parsed OSD records (updated 2024-10-23) and snapshot of the SC database (updated 2024-10-23).

Select annual climate data summaries for the SIMAS 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 2024-10-23).

Geomorphic description summaries for the SIMAS 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 2024-10-23).

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

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

Soil series sharing subgroup-level classification with SIMAS, 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 2024-10-23).

Block Diagrams

No block diagrams are available.

Map Units

Map units containing SIMAS 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
Simas very stony silt loam, 7 to 40 percent slopes	43E	2656	61095	21kt	or021	1978	1:24000
Hyall-Simas association, 12 to 35 percent slopes	79D	8690	62264	22sj	or604	1988	1:24000
Hyall-Simas association, 35 to 60 percent slopes	80E	4795	62267	22sm	or604	1988	1:24000
Simas-Sorf complex, 12 to 30 percent south slopes	070	16115	3432089	2ms1	or618		1:24000
Sorf-Simas complex, 30 to 60 percent south slopes	111	6791	3434687	2mrs	or618		1:24000
Day-Simas complex, 1 to 12 percent slopes	047	2808	3435023	2mqh	or618		1:24000
Simas silt loam, 0 to 15 percent slopes	117Cm	271	3434738	2mnn	or618		1:24000
Simas-Ruckles-Rock outcrop complex, 40 to 80 percent north slopes	120F	8565	63423	23zx	or620	1992	1:24000
Simas-Ruckles-Rock outcrop complex, 40 to 80 percent south slopes	121F	7434	63424	23zy	or620	1992	1:24000
Simas-Ruckles complex, 15 to 40 percent south slopes	119D	3926	63417	23zq	or620	1992	1:24000
Simas-Ruckles complex, 15 to 40 percent north slopes	118D	2605	63415	23zn	or620	1992	1:24000
Simas silt loam, 0 to 15 percent slopes	117C	1475	63413	23zl	or620	1992	1:24000
Drinkwater-Simas complex, 2 to 20 percent slopes	159C	1588	3425024	nk4y	or627		1:24000
Simas cobbly clay loam, 2 to 20 percent slopes	121C	1266	3425054	nfpn	or627		1:24000
Simas-Barbermill-Badland complex, 2 to 20 percent slopes	188C	1096	3425159	t73w	or627		1:24000
Simas-Barbermill-Badland complex, 20 to 50 percent north slopes	188E	540	3432025	t73x	or627		1:24000
Gooserock-Drinkwater-Simas complex, 30 to 60 percent slopes	105E	535	3425112	nfp2	or627		1:24000
Simas-Barbermill-Badland complex, 20 to 50 percent slopes	112E	498	3425060	t6sj	or627		1:24000
Simas cobbly clay loam, 15 to 30 percent north slopes	121D	371	3425080	nfpp	or627		1:24000
Simas-Brisbois-Badland complex, 30 to 60 percent north slopes	148E	277	3425110	nk4p	or627		1:24000
Simas-Gooserock complex, 20 to 50 percent north slopes	145E	205	3425020	nfq5	or627		1:24000
Simas-Brisbois-Badland complex, 2 to 15 percent slopes	148C	185	3425025	26j4	or627		1:24000
Simas-Brisbois-Badland complex, 15 to 30 percent north slopes	148D	169	3425061	nfq9	or627		1:24000
Brisbois-Badland-Simas complex, 20 to 50 percent north slopes	149E	106	3425178	nfqb	or627		1:24000
Simas-Day complex, 15 to 40 percent north slopes	358D	67	3425037	269l	or627		1:24000
Simas cobbly clay loam, 20 to 50 percent north slopes	121E	50	3434632	nk4m	or627		1:24000
Drinkwater-Simas complex, 20 to 50 percent south slopes	159D	12	3425048	1hh6g	or627		1:24000
Simas cobbly silty clay loam, 10 to 35 percent slopes	SlE	77700	62918	23gm	or666	1970	1:31680
Simas very stony clay loam, 35 to 70 percent slopes	SmF	40600	62919	23gn	or666	1970	1:31680
Simas soils, 8 to 40 percent slopes	SnE	19700	62920	23gp	or666	1970	1:31680
Simas-Antoken complex, 2 to 30 percent slopes	126	8088	63097	23nd	or674	1993	1:24000
Simas-Ruckles-Antoken complex, 2 to 40 percent slopes	127	7626	63099	23ng	or674	1993	1:24000
Sorf-Simas complex, 2 to 30 percent slopes	135	4768	63116	23p0	or674	1993	1:24000
Ruckles-Simas-Rock outcrop complex, 40 to 80 percent slopes	118	4016	63081	23mw	or674	1993	1:24000
Ruckles-Simas complex, 40 to 80 percent slopes	117	2380	63079	23mt	or674	1993	1:24000
Simas-Ruckles-Rock outcrop complex, 15 to 40 percent south slopes	356D	19734	3421692	269k	or677		1:24000
Simas-Sorf complex, 5 to 40 percent slopes	263E	10651	3384986	26d5	or677		1:24000
Simas-Ruckles-Twickenham complex, 2 to 15 percent slopes	310C	7700	3421708	268j	or677		1:24000
Simas-Gooserock complex, 20 to 50 percent north slopes	145E	5215	3421743	nfq5	or677		1:24000
Simas-Cooperopolis complex, 20 to 50 percent north slopes	355E	4120	3421773	269f	or677		1:24000
Drinkwater-Simas complex, 2 to 20 percent slopes	159C	3463	3421778	nk4y	or677		1:24000
Simas-Brisbois-Badland complex, 2 to 15 percent slopes	148C	3163	3421780	26j4	or677		1:24000
Twickenham-Simas complex, 15 to 40 percent slopes	309D	3090	3421785	nfqn	or677		1:24000
Simas-Day complex, 3 to 15 percent slopes	358C	2530	3421814	269m	or677		1:24000
Simas-Day complex, 15 to 40 percent north slopes	358D	1946	3421862	269l	or677		1:24000
Simas complex, 15 to 40 percent north slopes	310D	1550	3421911	268l	or677		1:24000
Simas-Day complex, 15 to 40 percent south slopes	359D	1495	3421915	269s	or677		1:24000
Drinkwater-Simas complex, 20 to 50 percent south slopes	159D	1403	3421919	1hh6g	or677		1:24000
Simas cobbly clay loam, 2 to 20 percent slopes	121C	1249	3421949	nfpn	or677		1:24000
Simas-Barbermill-Badland complex, 20 to 50 percent slopes	112E	941	3421977	t6sj	or677		1:24000
Simas-Brisbois-Badland complex, 15 to 30 percent north slopes	148D	934	3421991	nfq9	or677		1:24000
Simas-Badland complex, 15 to 40 percent north slopes	349D	681	3424460	2694	or677		1:24000
Twickenham-Simas-Sorf complex, 15 to 40 percent south slopes	322D	655	3424474	2kkwy	or677		1:24000
Simas-Brisbois-Badland complex, 30 to 60 percent north slopes	148E	465	3424540	nk4p	or677		1:24000
Gooserock-Drinkwater-Simas complex, 30 to 60 percent slopes	105E	457	3424542	nfp2	or677		1:24000
Simas cobbly clay loam, 15 to 30 percent north slopes	121D	444	3424515	nfpp	or677		1:24000
Simas-Turtlesprings-Brisbois complex, 8 to 40 percent slopes	315C	239	3424677	2wj6n	or677		1:24000
Day-Simas complex, 0 to 3 percent slopes	357A	147	3424749	269n	or677		1:24000
Simas-Barbermill-Badland complex, 2 to 20 percent slopes	188C	131	3424766	t73w	or677		1:24000
Brisbois-Badland-Simas complex, 20 to 50 percent north slopes	149E	56	3424819	nfqb	or677		1:24000

Map of Series Extent

Approximate geographic distribution of the SIMAS 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 2024-10-30).