Ändringar

              
    

          
          
        
        

            
f
1
{
f
1
{
            
2
  "author": "",
2
  "author": "",
            
3
  "author_email": "",
3
  "author_email": "",
            
4
  "creator_user_id": "a21a024c-343c-4b53-a214-49d6fe62a720",
4
  "creator_user_id": "a21a024c-343c-4b53-a214-49d6fe62a720",
            
5
  "groups": [],
5
  "groups": [],
            
6
  "id": "88d0198f-ac6b-43fa-ba59-bfe1f5ca507a",
6
  "id": "88d0198f-ac6b-43fa-ba59-bfe1f5ca507a",
            
7
  "isopen": true,
7
  "isopen": true,
            
8
  "license_id": "cc-by",
8
  "license_id": "cc-by",
            
9
  "license_title": "Creative Commons Attribution",
9
  "license_title": "Creative Commons Attribution",
            
10
  "license_url": "http://www.opendefinition.org/licenses/cc-by",
10
  "license_url": "http://www.opendefinition.org/licenses/cc-by",
            
11
  "maintainer": "",
11
  "maintainer": "",
            
12
  "maintainer_email": "",
12
  "maintainer_email": "",
            
13
  "metadata_created": "2025-09-03T16:23:18.660781",
13
  "metadata_created": "2025-09-03T16:23:18.660781",
            
n
14
  "metadata_modified": "2025-09-03T16:24:18.882036",
n
14
  "metadata_modified": "2025-09-03T16:24:49.302988",
            
15
  "name": "modflow-usg",
15
  "name": "modflow-usg",
            
t
16
  "notes": "",
t
16
  "notes": "Overview of MODFLOW-USG\r\nMedia\r\nA plot of head errors 
            
17
from an example MODFLOW-USG simulation.\r\nSources/Usage: Public 
            
18
Domain. View Media Details\r\nErrors in simulated heads from the a 
            
19
MODFLOW-USG simulation with ghost node correction.\r\nA version of 
            
20
MODFLOW, called MODFLOW-USG (for UnStructured Grid), was developed to 
            
21
support a wide variety of structured and unstructured grid types, 
            
22
including nested grids and grids based on prismatic triangles, 
            
23
rectangles, hexagons, and other cell shapes. Flexibility in grid 
            
24
design can be used to focus resolution along rivers and around wells, 
            
25
for example, or to subdiscretize individual layers to better represent 
            
26
hydrostratigraphic units.\r\n\r\nMODFLOW-USG is based on an underlying 
            
27
control volume finite difference (CVFD) formulation in which a cell 
            
28
can be connected to an arbitrary number of adjacent cells. To improve 
            
29
accuracy of the CVFD formulation for irregular grid-cell geometries or 
            
30
nested grids, a generalized Ghost Node Correction (GNC) Package was 
            
31
developed, which uses interpolated heads in the flow calculation 
            
32
between adjacent connected cells.\r\n\r\nMODFLOW-USG includes a 
            
33
Groundwater Flow (GWF) Process, based on the GWF Process in 
            
34
MODFLOW-2005, as well as a new Connected Linear Network (CLN) Process 
            
35
to simulate the effects of multi-node wells, karst conduits, and tile 
            
36
drains, for example. The CLN Process is tightly coupled with the GWF 
            
37
Process in that the equations from both processes are formulated into 
            
38
one matrix equation and solved simultaneously. This robustness results 
            
39
from using an unstructured grid with unstructured matrix storage and 
            
40
solution schemes.\r\n\r\nMODFLOW-USG also contains an optional 
            
41
Newton-Raphson formulation, based on the formulation in MODFLOW-NWT, 
            
42
for improving solution convergence and avoiding problems with the 
            
43
drying and rewetting of cells. Because the existing MODFLOW solvers 
            
44
were developed for structured and symmetric matrices, they were 
            
45
replaced with a new Sparse Matrix Solver (SMS) Package developed 
            
46
specifically for MODFLOW-USG. The SMS Package provides several methods 
            
47
for resolving nonlinearities and multiple symmetric and asymmetric 
            
48
linear solution schemes to solve the matrix arising from the flow 
            
49
equations and the Newton-Raphson formulation, 
            
50
respectively.\r\n\r\nDocumentation for MODFLOW-USG\r\nPanday, Sorab, 
            
51
Langevin, C.D., Niswonger, R.G., Ibaraki, Motomu, and Hughes, J.D., 
            
52
2013, MODFLOW-USG version 1: An unstructured grid version of MODFLOW 
            
53
for simulating groundwater flow and tightly coupled processes using a 
            
54
control volume finite-difference formulation: U.S. Geological Survey 
            
55
Techniques and Methods, book 6, chap. A45, 66 p., 
            
56
https://doi.org/10.3133/tm6A45",
            
17
  "num_resources": 1,
57
  "num_resources": 1,
            
18
  "num_tags": 3,
58
  "num_tags": 3,
            
19
  "organization": {
59
  "organization": {
            
20
    "approval_status": "approved",
60
    "approval_status": "approved",
            
21
    "created": "2025-02-26T23:11:51.432459",
61
    "created": "2025-02-26T23:11:51.432459",
            
22
    "description": "Subsidence data from the Texas Water Development 
62
    "description": "Subsidence data from the Texas Water Development 
            
23
Board",
63
Board",
            
24
    "id": "8cdc42f9-2327-4fba-aa65-094579980dba",
64
    "id": "8cdc42f9-2327-4fba-aa65-094579980dba",
            
25
    "image_url": 
65
    "image_url": 
            
26
du/uploads/group/2025-02-27-234107.348469SubsidenceThumbnailCKAN.png",
66
du/uploads/group/2025-02-27-234107.348469SubsidenceThumbnailCKAN.png",
            
27
    "is_organization": true,
67
    "is_organization": true,
            
28
    "name": "twdb-subside",
68
    "name": "twdb-subside",
            
29
    "state": "active",
69
    "state": "active",
            
30
    "title": "TWDB: Subside",
70
    "title": "TWDB: Subside",
            
31
    "type": "organization"
71
    "type": "organization"
            
32
  },
72
  },
            
33
  "owner_org": "8cdc42f9-2327-4fba-aa65-094579980dba",
73
  "owner_org": "8cdc42f9-2327-4fba-aa65-094579980dba",
            
34
  "private": false,
74
  "private": false,
            
35
  "relationships_as_object": [],
75
  "relationships_as_object": [],
            
36
  "relationships_as_subject": [],
76
  "relationships_as_subject": [],
            
37
  "resources": [
77
  "resources": [
            
38
    {
78
    {
            
39
      "cache_last_updated": null,
79
      "cache_last_updated": null,
            
40
      "cache_url": null,
80
      "cache_url": null,
            
41
      "created": "2025-09-03T16:24:18.739985",
81
      "created": "2025-09-03T16:24:18.739985",
            
42
      "description": "",
82
      "description": "",
            
43
      "format": "ZIP",
83
      "format": "ZIP",
            
44
      "hash": "",
84
      "hash": "",
            
45
      "id": "b89d8774-6e26-469e-b556-13f5d9d2b7ea",
85
      "id": "b89d8774-6e26-469e-b556-13f5d9d2b7ea",
            
46
      "last_modified": null,
86
      "last_modified": null,
            
47
      "metadata_modified": "2025-09-03T16:24:18.732216",
87
      "metadata_modified": "2025-09-03T16:24:18.732216",
            
48
      "mimetype": "application/zip",
88
      "mimetype": "application/zip",
            
49
      "mimetype_inner": null,
89
      "mimetype_inner": null,
            
50
      "mint_standard_variables": "",
90
      "mint_standard_variables": "",
            
51
      "name": "MODFLOW-USG Version 1.5 program, source code, user 
91
      "name": "MODFLOW-USG Version 1.5 program, source code, user 
            
52
guides, and example problems",
92
guides, and example problems",
            
53
      "package_id": "88d0198f-ac6b-43fa-ba59-bfe1f5ca507a",
93
      "package_id": "88d0198f-ac6b-43fa-ba59-bfe1f5ca507a",
            
54
      "position": 0,
94
      "position": 0,
            
55
      "resource_type": null,
95
      "resource_type": null,
            
56
      "size": null,
96
      "size": null,
            
57
      "state": "active",
97
      "state": "active",
            
58
      "url": 
98
      "url": 
            
59
s://water.usgs.gov/water-resources/software/MODFLOW-USG/mfusg1_5.zip",
99
s://water.usgs.gov/water-resources/software/MODFLOW-USG/mfusg1_5.zip",
            
60
      "url_type": null
100
      "url_type": null
            
61
    }
101
    }
            
62
  ],
102
  ],
            
63
  "spatial": "",
103
  "spatial": "",
            
64
  "state": "active",
104
  "state": "active",
            
65
  "tags": [
105
  "tags": [
            
66
    {
106
    {
            
67
      "display_name": "GAM",
107
      "display_name": "GAM",
            
68
      "id": "d599ebb6-d1c7-4f70-be07-c39db8c1b3ad",
108
      "id": "d599ebb6-d1c7-4f70-be07-c39db8c1b3ad",
            
69
      "name": "GAM",
109
      "name": "GAM",
            
70
      "state": "active",
110
      "state": "active",
            
71
      "vocabulary_id": null
111
      "vocabulary_id": null
            
72
    },
112
    },
            
73
    {
113
    {
            
74
      "display_name": "MODFLOW",
114
      "display_name": "MODFLOW",
            
75
      "id": "766d296f-931e-4a04-9c0d-edf5002f9b5c",
115
      "id": "766d296f-931e-4a04-9c0d-edf5002f9b5c",
            
76
      "name": "MODFLOW",
116
      "name": "MODFLOW",
            
77
      "state": "active",
117
      "state": "active",
            
78
      "vocabulary_id": null
118
      "vocabulary_id": null
            
79
    },
119
    },
            
80
    {
120
    {
            
81
      "display_name": "groundwater",
121
      "display_name": "groundwater",
            
82
      "id": "8c3cea90-aeac-4247-bfcc-d29ae7521ed6",
122
      "id": "8c3cea90-aeac-4247-bfcc-d29ae7521ed6",
            
83
      "name": "groundwater",
123
      "name": "groundwater",
            
84
      "state": "active",
124
      "state": "active",
            
85
      "vocabulary_id": null
125
      "vocabulary_id": null
            
86
    }
126
    }
            
87
  ],
127
  ],
            
88
  "title": "MODFLOW-USG",
128
  "title": "MODFLOW-USG",
            
89
  "type": "dataset",
129
  "type": "dataset",
            
90
  "url": 
130
  "url": 
            
91
uctured-grid-version-modflow-simulating-groundwater-flow-and-tightly",
131
uctured-grid-version-modflow-simulating-groundwater-flow-and-tightly",
            
92
  "version": ""
132
  "version": ""
            
93
}
133
}