Closed NodakJ closed 5 years ago
An idea, convert NULL om, caco3, SAR, EC to 0. Relates to #15, #12.
Check problem STATSGO musym s3673:
select cokey, round(comppct_r, 2), caco3_kg_sq_m, om_kg_sq_m, ph_025, max_om, sar, ec, ec_025 from statsgo_component_data where mukey = '669348' order by comppct_r DESC;
Note NULL om_r
, caco3_r
, ec_r
, and sar_r
converted to 0. The weighted mean of caco3_kg_sq_m
is now close to 4 kg / sq. of CaCO3.
cokey | round | caco3_kg_sq_m | om_kg_sq_m | ph_025 | max_om | sar | ec | ec_025
----------+-------+---------------+------------+--------+--------+-----+----+--------
14236676 | 0.38 | 0 | 8.96724 | 4.8 | 0.02 | 0 | 0 | 0
14236668 | 0.20 | 0 | 1.80624 | 5.5 | 0.02 | 0 | 0 | 0
14236669 | 0.08 | 0 | 8.96724 | 4.8 | 0.02 | 0 | 0 | 0
14236665 | 0.04 | 0 | 1.80624 | 5.5 | 0.02 | 0 | 0 | 0
14236679 | 0.04 | 0 | 5.95935 | 5.3 | 0.0125 | 0 | 0 | 0
14236666 | 0.03 | 0 | 4.08609 | 5.992 | 0.0075 | 0 | 0 | 0
14236677 | 0.03 | | | | 0.62 | 0 | 0 | 0
14236672 | 0.03 | 0 | 4.4928 | 5 | 0.03 | 0 | 0 | 0
14236678 | 0.03 | | | | 0 | 0 | 0 | 0
14236675 | 0.03 | 0 | 6.3954 | 5.6 | 0.055 | 0 | 0 | 0
14236670 | 0.02 | 0 | 5.652 | 5.3 | 0.02 | 0 | 0 | 0
14236673 | 0.02 | 0 | 4.4928 | 5 | 0.03 | 0 | 0 | 0
14236674 | 0.01 | 0 | 5.9432 | 5.3 | 0.0125 | 0 | 0 | 0
14236671 | 0.01 | 396.70776 | 8.94594 | 6.584 | 0.015 | 0 | 0 | 0
NULL stock values are related to missing dbovendry_r
values (#19).
cokey | compname | compkind | comppct_r | om_r | caco3_r | dbovendry_r | dbthirdbar_r | hzname | hzdept_r | hzdepb_r
----------+-------------+----------+-----------+------+---------+-------------+--------------+--------+----------+----------
14236677 | Seelyeville | Series | 3 | 62 | | | 0.18 | H2 | 25 | 152
14236677 | Seelyeville | Series | 3 | 62 | | | 0.18 | H1 | 0 | 25
The conversion of NULL -> 0 for SAR, CaCO3, and OM seems to have solved this problem. The 2018 value was ~ 396 kg/sq.m. and the 2019 value is ~ 4 kg/sq.m.. This is very close to my calculation from the source data.
Additional testing and verification.
select cokey, round(comppct_r, 2) AS comppct, caco3_kg_sq_m, om_kg_sq_m, ph_025, max_om, sar, ec, ec_025 from statsgo_component_data where mukey = '669348' order by comppct_r DESC;
cokey | comppct | caco3_kg_sq_m | om_kg_sq_m | ph_025 | max_om | sar | ec | ec_025
----------+---------+---------------+------------+--------+--------+-----+----+--------
14236676 | 0.38 | 0 | 8.96724 | 4.8 | 0.02 | 0 | 0 | 0
14236668 | 0.20 | 0 | 1.80624 | 5.5 | 0.02 | 0 | 0 | 0
14236669 | 0.08 | 0 | 8.96724 | 4.8 | 0.02 | 0 | 0 | 0
14236665 | 0.04 | 0 | 1.80624 | 5.5 | 0.02 | 0 | 0 | 0
14236679 | 0.04 | 0 | 5.95935 | 5.3 | 0.0125 | 0 | 0 | 0
14236666 | 0.03 | 0 | 4.08609 | 5.992 | 0.0075 | 0 | 0 | 0
14236677 | 0.03 | | | | 0.62 | 0 | 0 | 0
14236672 | 0.03 | 0 | 4.4928 | 5 | 0.03 | 0 | 0 | 0
14236678 | 0.03 | | | | 0 | 0 | 0 | 0
14236675 | 0.03 | 0 | 6.3954 | 5.6 | 0.055 | 0 | 0 | 0
14236670 | 0.02 | 0 | 5.652 | 5.3 | 0.02 | 0 | 0 | 0
14236673 | 0.02 | 0 | 4.4928 | 5 | 0.03 | 0 | 0 | 0
14236674 | 0.01 | 0 | 5.9432 | 5.3 | 0.0125 | 0 | 0 | 0
14236671 | 0.01 | 396.70776 | 8.94594 | 6.584 | 0.015 | 0 | 0 | 0
SELECT * FROM statsgo_grid_mapunit WHERE mukey = '669348';
grid_gid | mu_gid | mukey | area_wt | gid
----------+--------+--------+--------------------+----------
[...]
12136044 | 47010 | 669348 | 640000 | 6036962
[...]
SELECT * FROM statsgo_grid_mapunit WHERE grid_gid = 12136044;
grid_gid | mu_gid | mukey | area_wt | gid
----------+--------+--------+---------+---------
12136044 | 47010 | 669348 | 640000 | 6036962
SELECT gid, cokey, om_kg_sq_m_wt, caco3_kg_sq_m_wt from statsgo_component_weights where gid = 6036962;
gid | cokey | om_kg_sq_m_wt | caco3_kg_sq_m_wt
---------+----------+-----------------------------+-----------------------------
6036962 | 14236679 | 25600.00000000000000000000 | 25600.00000000000000000000
6036962 | 14236678 | |
6036962 | 14236677 | |
6036962 | 14236676 | 243200.00000000000000000000 | 243200.00000000000000000000
6036962 | 14236675 | 19200.00000000000000000000 | 19200.00000000000000000000
6036962 | 14236674 | 6400.00000000000000000000 | 6400.00000000000000000000
6036962 | 14236673 | 12800.00000000000000000000 | 12800.00000000000000000000
6036962 | 14236672 | 19200.00000000000000000000 | 19200.00000000000000000000
6036962 | 14236671 | 6400.00000000000000000000 | 6400.00000000000000000000
6036962 | 14236670 | 12800.00000000000000000000 | 12800.00000000000000000000
6036962 | 14236669 | 51200.00000000000000000000 | 51200.00000000000000000000
6036962 | 14236668 | 128000.00000000000000000000 | 128000.00000000000000000000
6036962 | 14236666 | 19200.00000000000000000000 | 19200.00000000000000000000
6036962 | 14236665 | 25600.00000000000000000000 | 25600.00000000000000000000
SELECT grid_gid, number_components, caco3_kg_sq_m, om_kg_sq_m from statsgo_gridded_properties where grid_gid = 12136044;
grid_gid | number_components | caco3_kg_sq_m | om_kg_sq_m
----------+-------------------+------------------+------------------
12136044 | 14 | 4.45739056179775 | 6.28968325842697
SELECT gid,
sum(caco3_kg_sq_m * caco3_kg_sq_m_wt) / NULLIF(sum(caco3_kg_sq_m_wt), 0) as caco3_kg_sq_m,
sum(om_kg_sq_m * om_kg_sq_m_wt) / NULLIF(sum(om_kg_sq_m_wt), 0) as om_kg_sq_m
FROM
(
SELECT cokey, round(comppct_r, 2) AS comppct, caco3_kg_sq_m, om_kg_sq_m from statsgo_component_data where mukey = '669348'
) AS a
JOIN
(
SELECT gid, cokey, om_kg_sq_m_wt, caco3_kg_sq_m_wt from statsgo_component_weights where gid = 6036962
) AS b USING (cokey)
GROUP BY gid
;
gid | caco3_kg_sq_m | om_kg_sq_m
---------+------------------+------------------
6036962 | 4.45739056179775 | 6.28968325842697
A quick view of results rendering Calcium Carbonate shows an unnatural spike in NE Minnesota in one map unit (s3673). A review of the source data STATSGO confirms that only 1% of the mapunit has a weighted average of roughly 17% calcium carbonate in a depth of 13-152cm. The remainder of the mapunit has no carbonates anywhere in the soil profile. Property grid results are 396.71 kg/m2 higher than some of the most calcareous soils in the Northern Great Plains.![carbs_nemn](https://user-images.githubusercontent.com/25324934/35013795-65c0f1b6-fb06-11e7-9dc9-7f5ecf3a5825.JPG)