{"id":1536,"date":"2026-05-13T02:54:11","date_gmt":"2026-05-13T02:54:11","guid":{"rendered":"https:\/\/books.gw-project.org\/basic-hydrogeology-an-introduction-to-the-fundamentals-of-groundwater-science\/?post_type=part&p=1536"},"modified":"2026-05-13T03:00:18","modified_gmt":"2026-05-13T03:00:18","slug":"notations","status":"publish","type":"part","link":"https:\/\/books.gw-project.org\/basic-hydrogeology-an-introduction-to-the-fundamentals-of-groundwater-science\/part\/notations\/","title":{"raw":"24. Notations","rendered":"24. Notations"},"content":{"raw":"
\r\n<\/colgroup>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Alpha<\/em>[latex]\\ A[\/latex]<\/th>\r\n=<\/th>\r\ncross\u2011sectional area (L2<\/sup>)<\/th>\r\n<\/tr>\r\n<\/thead>\r\n
[latex]\\alpha[\/latex]<\/td>\r\n=<\/td>\r\ncompressibility of the aquifer matrix (LT2<\/sup>M-1<\/sup>) , with the exception in the following row<\/td>\r\n<\/tr>\r\n
[latex]\\alpha[\/latex]<\/td>\r\n=<\/td>\r\nin section 9.2.4, angle of refraction, also defined in the row above this row<\/td>\r\n<\/tr>\r\n
[latex]b[\/latex]<\/td>\r\n=<\/td>\r\nsaturated thickness of the aquifer (L), with the exception in the following row<\/td>\r\n<\/tr>\r\n
[latex]b[\/latex]<\/td>\r\n=<\/td>\r\nin Sections 16 and 17, aperture (distance between walls of fracture) (L), also defined in the row above this row<\/td>\r\n<\/tr>\r\n
Beta<\/em> [latex]\\beta[\/latex]<\/td>\r\n=<\/td>\r\ncompressibility of water (LT2<\/sup>M-1<\/sup>)<\/td>\r\n<\/tr>\r\n
d<\/em><\/td>\r\n=<\/td>\r\nnumber of flow tubes, areas bounded by adjacent pairs of flow lines (:)<\/td>\r\n<\/tr>\r\n
Delta<\/em> [latex]\\mathrm{\\Delta}\\sigma[\/latex]<\/td>\r\n=<\/td>\r\nchange in effective stress (MLT-2<\/sup>)<\/td>\r\n<\/tr>\r\n
Delta<\/em> [latex]\\mathrm{\\Delta}L\/L[\/latex]<\/td>\r\n=<\/td>\r\nchange in length (thickness) over the total length (L)<\/td>\r\n<\/tr>\r\n
[latex]\\mathrm{\\Delta}Storage[\/latex]<\/td>\r\n=<\/td>\r\nchange in storage over time in a system that balances input and output<\/td>\r\n<\/tr>\r\n
[latex]dh\/dl[\/latex]<\/td>\r\n=<\/td>\r\nhydraulic gradient or change in hydraulic head (:)<\/td>\r\n<\/tr>\r\n
[latex]\\partial h\/\\partial x[\/latex]<\/td>\r\n=<\/td>\r\nhydraulic gradient with respect to x (:)<\/td>\r\n<\/tr>\r\n
e<\/em><\/td>\r\n=<\/td>\r\nvoid ratio (:)<\/td>\r\n<\/tr>\r\n
[latex]f[\/latex]<\/td>\r\n=<\/td>\r\nnumber of equipotential drops across a flow net (:)<\/td>\r\n<\/tr>\r\n
[latex]g[\/latex]<\/td>\r\n=<\/td>\r\ngravitational acceleration (LT- 2<\/sup>)<\/td>\r\n<\/tr>\r\n
h<\/em><\/td>\r\n=<\/td>\r\nhydraulic head (L)<\/td>\r\n<\/tr>\r\n
Eta<\/em> [latex]H[\/latex]<\/td>\r\n=<\/td>\r\nhead of the backwater above the weir crest in ft<\/td>\r\n<\/tr>\r\n
Eta<\/em> [latex]H_{a}[\/latex]<\/td>\r\n=<\/td>\r\nheat energy added (L) expressed as height of column of water<\/td>\r\n<\/tr>\r\n
Eta<\/em> [latex]{\\ H}_{L}[\/latex]<\/td>\r\n=<\/td>\r\nmechanical energy lost (L) expressed as height of column of water<\/td>\r\n<\/tr>\r\n
Eta<\/em> [latex]H_{E}[\/latex]<\/td>\r\n=<\/td>\r\nheat energy extracted (L) expressed as height of column of water<\/td>\r\n<\/tr>\r\n
i<\/em><\/td>\r\n=<\/td>\r\nhydraulic gradient (dh\/dl<\/em>) (:)<\/td>\r\n<\/tr>\r\n
Iota I(t)<\/em><\/td>\r\n=<\/td>\r\ninput to a system over time<\/td>\r\n<\/tr>\r\n
k<\/em><\/td>\r\n=<\/td>\r\nintrinsic permeability (L2<\/sup>)<\/td>\r\n<\/tr>\r\n
K<\/em><\/td>\r\n=<\/td>\r\nhydraulic conductivity (LT-1<\/sup>)<\/td>\r\n<\/tr>\r\n
L<\/em><\/td>\r\n=<\/td>\r\nlength of the weir crest in ft<\/td>\r\n<\/tr>\r\n
Mu<\/em> [latex]\\mu_{fluid}[\/latex]<\/td>\r\n=<\/td>\r\nviscosity of the fluid (ML-1<\/sup>T-1<\/sup>)<\/td>\r\n<\/tr>\r\n
Mu \u03bc<\/em><\/td>\r\n=<\/td>\r\nviscosity (ML-1<\/sup>T-1<\/sup>)<\/td>\r\n<\/tr>\r\n
n<\/em><\/td>\r\n=<\/td>\r\nporosity ([latex]:[\/latex]), with the exception in the following row<\/td>\r\n<\/tr>\r\n
n<\/em><\/td>\r\n=<\/td>\r\nin section 13.5.2, Manning roughness coefficient (:), also defined in the row above<\/td>\r\n<\/tr>\r\n
\u03c9<\/em><\/td>\r\n=<\/td>\r\ngravimetric moisture content (:)<\/td>\r\n<\/tr>\r\n
O(t)<\/em><\/td>\r\n=<\/td>\r\noutput from a system over time<\/td>\r\n<\/tr>\r\n
p<\/em><\/td>\r\n=<\/td>\r\npressure (ML-1<\/sup>T-2<\/sup>)<\/td>\r\n<\/tr>\r\n
[latex]P_{f}[\/latex]<\/td>\r\n=<\/td>\r\npore fluid pressure (ML-1<\/sup>T-2<\/sup>)<\/td>\r\n<\/tr>\r\n
[latex]P_{h}[\/latex]<\/td>\r\n=<\/td>\r\nhydrostatic pressure; hydrostatic pore fluid pressure (ML-1<\/sup>T-2<\/sup>)<\/td>\r\n<\/tr>\r\n
Phi \u03c6<\/em><\/td>\r\n=<\/td>\r\nporosity (:)<\/td>\r\n<\/tr>\r\n
Phi<\/em> [latex]\\varphi_{eff}[\/latex]<\/td>\r\n=<\/td>\r\neffective porosity (:)<\/td>\r\n<\/tr>\r\n
Psi \u03c8<\/em><\/td>\r\n=<\/td>\r\nmatric potential (or negative pressure head) (L)<\/td>\r\n<\/tr>\r\n
Q<\/em><\/td>\r\n=<\/td>\r\nvolumetric discharge (L3<\/sup>T-1<\/sup>)<\/td>\r\n<\/tr>\r\n
q<\/em><\/td>\r\n=<\/td>\r\nspecific discharge of groundwater flow (LT-1<\/sup>)<\/td>\r\n<\/tr>\r\n
q\u2019<\/em><\/td>\r\n=<\/td>\r\nflow per unit width of aquifer (L2<\/sup>T-1<\/sup>)<\/td>\r\n<\/tr>\r\n
r<\/em><\/td>\r\n=<\/td>\r\nradius (distance from pumping well) (L)<\/td>\r\n<\/tr>\r\n
R<\/em><\/td>\r\n=<\/td>\r\nhydraulic radius (L)<\/td>\r\n<\/tr>\r\n
Rho<\/em>[latex]\\ \\rho_{bulk}[\/latex]<\/td>\r\n=<\/td>\r\nbulk density (ML-3<\/sup>)<\/td>\r\n<\/tr>\r\n
Rho<\/em>[latex]\\ \\rho_{fluid}[\/latex]<\/td>\r\n=<\/td>\r\ndensity of the fluid (ML-3<\/sup>)<\/td>\r\n<\/tr>\r\n
Rho<\/em> [latex]\\ \\rho_{f}[\/latex]<\/td>\r\n=<\/td>\r\nfluid density (ML-3<\/sup>)<\/td>\r\n<\/tr>\r\n
s<\/em><\/td>\r\n=<\/td>\r\ndrawdown (L)<\/td>\r\n<\/tr>\r\n
S<\/em><\/td>\r\n=<\/td>\r\nstorativity, [latex]S = S_{s}b[\/latex] (:)<\/td>\r\n<\/tr>\r\n
Sd<\/sub><\/em>[latex]S_{d}[\/latex]<\/td>\r\n=<\/td>\r\ndegree of saturation (:)<\/td>\r\n<\/tr>\r\n
Sigma<\/em> [latex]\\sigma[\/latex]<\/td>\r\n=<\/td>\r\ntotal vertical stress; also called the normal stress (ML-1<\/sup>T-2<\/sup>)<\/td>\r\n<\/tr>\r\n
Sigma \u03c3\u2019<\/em><\/td>\r\n=<\/td>\r\neffective stress, or \u201cgrain to grain\u201d stress in the rock (ML-1<\/sup>T-2<\/sup>)<\/td>\r\n<\/tr>\r\n
Sigma<\/em> [latex]\\sigma_{v}[\/latex]<\/td>\r\n=<\/td>\r\nvertical stress (ML-1<\/sup>T-2<\/sup>)<\/td>\r\n<\/tr>\r\n
[latex]S_{r}[\/latex]<\/td>\r\n=<\/td>\r\nspecific retention (:)<\/td>\r\n<\/tr>\r\n
[latex]S_{s}[\/latex]<\/td>\r\n=<\/td>\r\nspecific storage (L-1<\/sup>)<\/td>\r\n<\/tr>\r\n
[latex]S_{y}[\/latex]<\/td>\r\n=<\/td>\r\nspecific yield (:)<\/td>\r\n<\/tr>\r\n
\u03b8<\/em><\/td>\r\n=<\/td>\r\nvolumetric moisture content (L3<\/sup>L-3<\/sup>)<\/td>\r\n<\/tr>\r\n
T<\/em><\/td>\r\n=<\/td>\r\naquifer transmissivity, [latex]T\\ = \\ Kb[\/latex] (L2<\/sup>T-1<\/sup> )<\/td>\r\n<\/tr>\r\n
t<\/em><\/td>\r\n=<\/td>\r\ntime (T)<\/td>\r\n<\/tr>\r\n
u<\/em><\/td>\r\n=<\/td>\r\nexcess fluid pressure<\/td>\r\n<\/tr>\r\n
v<\/em><\/td>\r\n=<\/td>\r\nvelocity (LT-1<\/sup>)<\/td>\r\n<\/tr>\r\n
[latex]v_{avg}[\/latex]<\/td>\r\n=<\/td>\r\naverage linear velocity (LT-1<\/sup>)<\/td>\r\n<\/tr>\r\n
[latex]V_{solids}[\/latex]<\/td>\r\n=<\/td>\r\nvolume of the solids (L3<\/sup>)<\/td>\r\n<\/tr>\r\n
[latex]V_{total}[\/latex]<\/td>\r\n=<\/td>\r\ntotal volume of the sample ((L3<\/sup>)<\/td>\r\n<\/tr>\r\n
[latex]V_{voids}[\/latex]<\/td>\r\n=<\/td>\r\nvolume of the voids (L3<\/sup>)<\/td>\r\n<\/tr>\r\n
w<\/em><\/td>\r\n=<\/td>\r\nrate of vertical leakage or recharge to the aquifer (LT-1<\/sup>)<\/td>\r\n<\/tr>\r\n
x<\/em><\/td>\r\n=<\/td>\r\nsome distance from [latex]h_{1}\\ ([\/latex]L)<\/td>\r\n<\/tr>\r\n
x, y<\/em><\/td>\r\n=<\/td>\r\nCartesian coordinates (L)<\/td>\r\n<\/tr>\r\n
x, y, z<\/em><\/td>\r\n=<\/td>\r\nlengths in the principal directions in our coordinate systems<\/td>\r\n<\/tr>\r\n
z<\/em><\/td>\r\n=<\/td>\r\nelevation head (L) , with the exceptions in the two following rows<\/td>\r\n<\/tr>\r\n
z<\/em><\/td>\r\n=<\/td>\r\nin section 15.3, equation 97, thickness of the layer of material (L), also defined in the row above and below<\/td>\r\n<\/tr>\r\n
z<\/em><\/td>\r\n=<\/td>\r\nin section 15.3, equations 99 and 100, thickness of the overlying layer of water (L), also defined in the two rows above<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/div>","rendered":"
\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Alpha<\/em>[latex]\\ A[\/latex]<\/th>\n=<\/th>\ncross\u2011sectional area (L2<\/sup>)<\/th>\n<\/tr>\n<\/thead>\n
[latex]\\alpha[\/latex]<\/td>\n=<\/td>\ncompressibility of the aquifer matrix (LT2<\/sup>M-1<\/sup>) , with the exception in the following row<\/td>\n<\/tr>\n
[latex]\\alpha[\/latex]<\/td>\n=<\/td>\nin section 9.2.4, angle of refraction, also defined in the row above this row<\/td>\n<\/tr>\n
[latex]b[\/latex]<\/td>\n=<\/td>\nsaturated thickness of the aquifer (L), with the exception in the following row<\/td>\n<\/tr>\n
[latex]b[\/latex]<\/td>\n=<\/td>\nin Sections 16 and 17, aperture (distance between walls of fracture) (L), also defined in the row above this row<\/td>\n<\/tr>\n
Beta<\/em> [latex]\\beta[\/latex]<\/td>\n=<\/td>\ncompressibility of water (LT2<\/sup>M-1<\/sup>)<\/td>\n<\/tr>\n
d<\/em><\/td>\n=<\/td>\nnumber of flow tubes, areas bounded by adjacent pairs of flow lines (:)<\/td>\n<\/tr>\n
Delta<\/em> [latex]\\mathrm{\\Delta}\\sigma[\/latex]<\/td>\n=<\/td>\nchange in effective stress (MLT-2<\/sup>)<\/td>\n<\/tr>\n
Delta<\/em> [latex]\\mathrm{\\Delta}L\/L[\/latex]<\/td>\n=<\/td>\nchange in length (thickness) over the total length (L)<\/td>\n<\/tr>\n
[latex]\\mathrm{\\Delta}Storage[\/latex]<\/td>\n=<\/td>\nchange in storage over time in a system that balances input and output<\/td>\n<\/tr>\n
[latex]dh\/dl[\/latex]<\/td>\n=<\/td>\nhydraulic gradient or change in hydraulic head (:)<\/td>\n<\/tr>\n
[latex]\\partial h\/\\partial x[\/latex]<\/td>\n=<\/td>\nhydraulic gradient with respect to x (:)<\/td>\n<\/tr>\n
e<\/em><\/td>\n=<\/td>\nvoid ratio (:)<\/td>\n<\/tr>\n
[latex]f[\/latex]<\/td>\n=<\/td>\nnumber of equipotential drops across a flow net (:)<\/td>\n<\/tr>\n
[latex]g[\/latex]<\/td>\n=<\/td>\ngravitational acceleration (LT– 2<\/sup>)<\/td>\n<\/tr>\n
h<\/em><\/td>\n=<\/td>\nhydraulic head (L)<\/td>\n<\/tr>\n
Eta<\/em> [latex]H[\/latex]<\/td>\n=<\/td>\nhead of the backwater above the weir crest in ft<\/td>\n<\/tr>\n
Eta<\/em> [latex]H_{a}[\/latex]<\/td>\n=<\/td>\nheat energy added (L) expressed as height of column of water<\/td>\n<\/tr>\n
Eta<\/em> [latex]{\\ H}_{L}[\/latex]<\/td>\n=<\/td>\nmechanical energy lost (L) expressed as height of column of water<\/td>\n<\/tr>\n
Eta<\/em> [latex]H_{E}[\/latex]<\/td>\n=<\/td>\nheat energy extracted (L) expressed as height of column of water<\/td>\n<\/tr>\n
i<\/em><\/td>\n=<\/td>\nhydraulic gradient (dh\/dl<\/em>) (:)<\/td>\n<\/tr>\n
Iota I(t)<\/em><\/td>\n=<\/td>\ninput to a system over time<\/td>\n<\/tr>\n
k<\/em><\/td>\n=<\/td>\nintrinsic permeability (L2<\/sup>)<\/td>\n<\/tr>\n
K<\/em><\/td>\n=<\/td>\nhydraulic conductivity (LT-1<\/sup>)<\/td>\n<\/tr>\n
L<\/em><\/td>\n=<\/td>\nlength of the weir crest in ft<\/td>\n<\/tr>\n
Mu<\/em> [latex]\\mu_{fluid}[\/latex]<\/td>\n=<\/td>\nviscosity of the fluid (ML-1<\/sup>T-1<\/sup>)<\/td>\n<\/tr>\n
Mu \u03bc<\/em><\/td>\n=<\/td>\nviscosity (ML-1<\/sup>T-1<\/sup>)<\/td>\n<\/tr>\n
n<\/em><\/td>\n=<\/td>\nporosity ([latex]:[\/latex]), with the exception in the following row<\/td>\n<\/tr>\n
n<\/em><\/td>\n=<\/td>\nin section 13.5.2, Manning roughness coefficient (:), also defined in the row above<\/td>\n<\/tr>\n
\u03c9<\/em><\/td>\n=<\/td>\ngravimetric moisture content (:)<\/td>\n<\/tr>\n
O(t)<\/em><\/td>\n=<\/td>\noutput from a system over time<\/td>\n<\/tr>\n
p<\/em><\/td>\n=<\/td>\npressure (ML-1<\/sup>T-2<\/sup>)<\/td>\n<\/tr>\n
[latex]P_{f}[\/latex]<\/td>\n=<\/td>\npore fluid pressure (ML-1<\/sup>T-2<\/sup>)<\/td>\n<\/tr>\n
[latex]P_{h}[\/latex]<\/td>\n=<\/td>\nhydrostatic pressure; hydrostatic pore fluid pressure (ML-1<\/sup>T-2<\/sup>)<\/td>\n<\/tr>\n
Phi \u03c6<\/em><\/td>\n=<\/td>\nporosity (:)<\/td>\n<\/tr>\n
Phi<\/em> [latex]\\varphi_{eff}[\/latex]<\/td>\n=<\/td>\neffective porosity (:)<\/td>\n<\/tr>\n
Psi \u03c8<\/em><\/td>\n=<\/td>\nmatric potential (or negative pressure head) (L)<\/td>\n<\/tr>\n
Q<\/em><\/td>\n=<\/td>\nvolumetric discharge (L3<\/sup>T-1<\/sup>)<\/td>\n<\/tr>\n
q<\/em><\/td>\n=<\/td>\nspecific discharge of groundwater flow (LT-1<\/sup>)<\/td>\n<\/tr>\n
q\u2019<\/em><\/td>\n=<\/td>\nflow per unit width of aquifer (L2<\/sup>T-1<\/sup>)<\/td>\n<\/tr>\n
r<\/em><\/td>\n=<\/td>\nradius (distance from pumping well) (L)<\/td>\n<\/tr>\n
R<\/em><\/td>\n=<\/td>\nhydraulic radius (L)<\/td>\n<\/tr>\n
Rho<\/em>[latex]\\ \\rho_{bulk}[\/latex]<\/td>\n=<\/td>\nbulk density (ML-3<\/sup>)<\/td>\n<\/tr>\n
Rho<\/em>[latex]\\ \\rho_{fluid}[\/latex]<\/td>\n=<\/td>\ndensity of the fluid (ML-3<\/sup>)<\/td>\n<\/tr>\n
Rho<\/em> [latex]\\ \\rho_{f}[\/latex]<\/td>\n=<\/td>\nfluid density (ML-3<\/sup>)<\/td>\n<\/tr>\n
s<\/em><\/td>\n=<\/td>\ndrawdown (L)<\/td>\n<\/tr>\n
S<\/em><\/td>\n=<\/td>\nstorativity, [latex]S = S_{s}b[\/latex] (:)<\/td>\n<\/tr>\n
Sd<\/sub><\/em>[latex]S_{d}[\/latex]<\/td>\n=<\/td>\ndegree of saturation (:)<\/td>\n<\/tr>\n
Sigma<\/em> [latex]\\sigma[\/latex]<\/td>\n=<\/td>\ntotal vertical stress; also called the normal stress (ML-1<\/sup>T-2<\/sup>)<\/td>\n<\/tr>\n
Sigma \u03c3\u2019<\/em><\/td>\n=<\/td>\neffective stress, or \u201cgrain to grain\u201d stress in the rock (ML-1<\/sup>T-2<\/sup>)<\/td>\n<\/tr>\n
Sigma<\/em> [latex]\\sigma_{v}[\/latex]<\/td>\n=<\/td>\nvertical stress (ML-1<\/sup>T-2<\/sup>)<\/td>\n<\/tr>\n
[latex]S_{r}[\/latex]<\/td>\n=<\/td>\nspecific retention (:)<\/td>\n<\/tr>\n
[latex]S_{s}[\/latex]<\/td>\n=<\/td>\nspecific storage (L-1<\/sup>)<\/td>\n<\/tr>\n
[latex]S_{y}[\/latex]<\/td>\n=<\/td>\nspecific yield (:)<\/td>\n<\/tr>\n
\u03b8<\/em><\/td>\n=<\/td>\nvolumetric moisture content (L3<\/sup>L-3<\/sup>)<\/td>\n<\/tr>\n
T<\/em><\/td>\n=<\/td>\naquifer transmissivity, [latex]T\\ = \\ Kb[\/latex] (L2<\/sup>T-1<\/sup> )<\/td>\n<\/tr>\n
t<\/em><\/td>\n=<\/td>\ntime (T)<\/td>\n<\/tr>\n
u<\/em><\/td>\n=<\/td>\nexcess fluid pressure<\/td>\n<\/tr>\n
v<\/em><\/td>\n=<\/td>\nvelocity (LT-1<\/sup>)<\/td>\n<\/tr>\n
[latex]v_{avg}[\/latex]<\/td>\n=<\/td>\naverage linear velocity (LT-1<\/sup>)<\/td>\n<\/tr>\n
[latex]V_{solids}[\/latex]<\/td>\n=<\/td>\nvolume of the solids (L3<\/sup>)<\/td>\n<\/tr>\n
[latex]V_{total}[\/latex]<\/td>\n=<\/td>\ntotal volume of the sample ((L3<\/sup>)<\/td>\n<\/tr>\n
[latex]V_{voids}[\/latex]<\/td>\n=<\/td>\nvolume of the voids (L3<\/sup>)<\/td>\n<\/tr>\n
w<\/em><\/td>\n=<\/td>\nrate of vertical leakage or recharge to the aquifer (LT-1<\/sup>)<\/td>\n<\/tr>\n
x<\/em><\/td>\n=<\/td>\nsome distance from [latex]h_{1}\\ ([\/latex]L)<\/td>\n<\/tr>\n
x, y<\/em><\/td>\n=<\/td>\nCartesian coordinates (L)<\/td>\n<\/tr>\n
x, y, z<\/em><\/td>\n=<\/td>\nlengths in the principal directions in our coordinate systems<\/td>\n<\/tr>\n
z<\/em><\/td>\n=<\/td>\nelevation head (L) , with the exceptions in the two following rows<\/td>\n<\/tr>\n
z<\/em><\/td>\n=<\/td>\nin section 15.3, equation 97, thickness of the layer of material (L), also defined in the row above and below<\/td>\n<\/tr>\n
z<\/em><\/td>\n=<\/td>\nin section 15.3, equations 99 and 100, thickness of the overlying layer of water (L), also defined in the two rows above<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"parent":0,"menu_order":24,"template":"","meta":{"pb_part_invisible":false,"pb_part_invisible_string":""},"contributor":[],"license":[],"class_list":["post-1536","part","type-part","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/books.gw-project.org\/basic-hydrogeology-an-introduction-to-the-fundamentals-of-groundwater-science\/wp-json\/pressbooks\/v2\/parts\/1536","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/books.gw-project.org\/basic-hydrogeology-an-introduction-to-the-fundamentals-of-groundwater-science\/wp-json\/pressbooks\/v2\/parts"}],"about":[{"href":"https:\/\/books.gw-project.org\/basic-hydrogeology-an-introduction-to-the-fundamentals-of-groundwater-science\/wp-json\/wp\/v2\/types\/part"}],"version-history":[{"count":2,"href":"https:\/\/books.gw-project.org\/basic-hydrogeology-an-introduction-to-the-fundamentals-of-groundwater-science\/wp-json\/pressbooks\/v2\/parts\/1536\/revisions"}],"predecessor-version":[{"id":1567,"href":"https:\/\/books.gw-project.org\/basic-hydrogeology-an-introduction-to-the-fundamentals-of-groundwater-science\/wp-json\/pressbooks\/v2\/parts\/1536\/revisions\/1567"}],"wp:attachment":[{"href":"https:\/\/books.gw-project.org\/basic-hydrogeology-an-introduction-to-the-fundamentals-of-groundwater-science\/wp-json\/wp\/v2\/media?parent=1536"}],"wp:term":[{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/books.gw-project.org\/basic-hydrogeology-an-introduction-to-the-fundamentals-of-groundwater-science\/wp-json\/wp\/v2\/contributor?post=1536"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/books.gw-project.org\/basic-hydrogeology-an-introduction-to-the-fundamentals-of-groundwater-science\/wp-json\/wp\/v2\/license?post=1536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}