From 71b6cc2d6b28bd17b206c3e94015a59818ee971f Mon Sep 17 00:00:00 2001 From: Yifan Cheng Date: Thu, 23 Apr 2026 13:56:03 -0600 Subject: [PATCH 1/8] update hydrology documentation - experiment --- .../Hydrology/CLM50_Tech_Note_Hydrology.rst | 30 +++++++++---------- 1 file changed, 15 insertions(+), 15 deletions(-) diff --git a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst index fe379aa2b7..df773ae414 100644 --- a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst +++ b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst @@ -3,7 +3,7 @@ Hydrology ============ -The model parameterizes interception, throughfall, canopy drip, snow accumulation and melt, water transfer between snow layers, infiltration, evaporation, surface runoff, sub-surface drainage, redistribution within the soil column, and groundwater discharge and recharge to simulate changes in canopy water :math:`\Delta W_{can,\,liq}`, canopy snow water :math:`\Delta W_{can,\,sno}` surface water :math:`\Delta W_{sfc}`, snow water :math:`\Delta W_{sno}`, soil water :math:`\Delta w_{liq,\, i}`, and soil ice :math:`\Delta w_{ice,\, i}`, and water in the unconfined aquifer :math:`\Delta W_{a}` (all in kg m\ :sup:`-2` or mm of H\ :sub:`2`\ O) (:numref:`Figure Hydrologic processes`). +The model parameterizes interception, throughfall, canopy drip, snow accumulation and melt, water transfer between snow layers, infiltration, evaporation, surface runoff, sub-surface drainage, redistribution within the soil column, and groundwater discharge and recharge to simulate changes in canopy liquid water :math:`\Delta W_{can,\,liq}`, canopy snow water :math:`\Delta W_{can,\,sno}`, surface water :math:`\Delta W_{sfc}`, snow water :math:`\Delta W_{sno}`, soil water :math:`\Delta w_{liq,\, i}`, and soil ice :math:`\Delta w_{ice,\, i}`, and water in the unconfined aquifer :math:`\Delta W_{a}` (all in kg m\ :sup:`-2` or mm of H\ :sub:`2`\ O) (:numref:`Figure Hydrologic processes`). The total water balance of the system is @@ -106,31 +106,31 @@ Canopy snow unloading from wind speed :math:`u` and above-freezing temperatures .. math:: :label: 7.12 - q_{unl,\, wind} =\frac{u W_{can,sno}}{1.56\times 10^5 \text{ m}} + q_{unl,\, wind} =\frac{f_{unl,wind,sno} u W_{can,sno}}{1.56\times 10^5 \text{ m}} .. math:: :label: 7.13 - q_{unl,\, temp} =\frac{W_{can,sno}(T-270 \textrm{ K})}{1.87\times 10^5 \text{ K s}} > 0 + q_{unl,\, temp} =\frac{W_{can,sno}(T-270.15 \textrm{ K})}{1.87\times 10^5 \text{ K s}} > 0 .. math:: :label: 7.14 q_{unl,\, tot} =\min \left( q_{unl,\, wind} +q_{unl,\, temp} ,W_{can,\, sno} \right) -The canopy liquid water and snow water equivalent are updated as +where :math: `f_{unl,wind,sno}` is a fraction of snow unloaded from canopy due to wind. The canopy liquid water and snow water equivalent are updated as .. math:: :label: 7.15 - W_{can,\, liq}^{n+1} =W_{can,liq}^{n} + q_{intr,\, liq} - q_{drip,\, liq} \Delta t - E_{v}^{liq} \Delta t \ge 0 + W_{can,\, liq}^{n+1} =W_{can,liq}^{n} + q_{intr,\, liq} \Delta t - q_{drip,\, liq} \Delta t - E_{v}^{liq} \Delta t \ge 0 and .. math:: :label: 7.16 - W_{can,\, sno}^{n+1} =W_{can,sno}^{n} + q_{intr,\, ice} - \left(q_{drip,\, ice}+q_{unl,\, tot} \right)\Delta t + W_{can,\, sno}^{n+1} =W_{can,sno}^{n} + q_{intr,\, ice} \Delta t - \left(q_{drip,\, ice}+q_{unl,\, tot} \right)\Delta t - E_{v}^{ice} \Delta t \ge 0 .. W_{can}^{n+1} =W_{can}^{n} +q_{intr} \Delta t-\left(q_{drip,\, liq} +q_{drip,\, ice} \right)\Delta t-E_{v}^{w} \Delta t\ge 0. @@ -174,7 +174,7 @@ The total rate of liquid and solid precipitation reaching the ground is then Solid precipitation reaching the soil or snow surface, :math:`q_{grnd,\, ice} \Delta t`, is added immediately to the snow pack (Chapter :numref:`rst_Snow Hydrology`). The liquid part, :math:`q_{grnd,\, liq} \Delta t` is added after surface fluxes (Chapter :numref:`rst_Momentum, Sensible Heat, and Latent Heat Fluxes`) and snow/soil temperatures (Chapter :numref:`rst_Soil and Snow Temperatures`) have been determined. -The wetted fraction of the canopy (stems plus leaves), which is required for surface flux (Chapter :numref:`rst_Momentum, Sensible Heat, and Latent Heat Fluxes`) calculations, is (:ref:`Dickinson et al.1993 `) +The wetted fraction of the canopy (stems plus leaves), which is required for surface flux (Chapter :numref:`rst_Momentum, Sensible Heat, and Latent Heat Fluxes`) calculations, is (:ref:`Dickinson et al. 1993 `) .. math:: :label: 7.21 @@ -240,7 +240,7 @@ where :math:`f_{\max }` is the potential or maximum value of :math:`f_{sat}`, :m Surface Water Storage ^^^^^^^^^^^^^^^^^^^^^^^^^^^ -A surface water store has been added to the model to represent wetlands and small, sub-grid scale water bodies. As a result, the wetland land unit has been removed as of CLM4.5. The state variables for surface water are the mass of water :math:`W_{sfc}` (kg m\ :sup:`-2`) and temperature :math:`T_{h2osfc}` (Chapter :numref:`rst_Soil and Snow Temperatures`). Surface water storage and outflow are functions of fine spatial scale elevation variations called microtopography. The microtopography is assumed to be distributed normally around the grid cell mean elevation. Given the standard deviation of the microtopographic distribution, :math:`\sigma _{micro}` (m), the fractional area of the grid cell that is inundated can be calculated. Surface water storage, :math:`Wsfc`, is related to the height (relative to the grid cell mean elevation) of the surface water, :math:`d`, by +A surface water store has been added to the model to represent wetlands and small, sub-grid scale water bodies. As a result, the wetland land unit has been removed as of CLM4.5. The state variables for surface water are the mass of water :math:`W_{sfc}` (kg m\ :sup:`-2`) and temperature :math:`T_{h2osfc}` (Chapter :numref:`rst_Soil and Snow Temperatures`). Surface water storage and outflow are functions of fine spatial scale elevation variations called microtopography. The microtopography is assumed to be distributed normally around the grid cell mean elevation. Given the standard deviation of the microtopographic distribution, :math:`\sigma _{micro}` (m), the fractional area of the grid cell that is inundated can be calculated. Surface water storage, :math:`W_{sfc}`, is related to the height (relative to the grid cell mean elevation) of the surface water, :math:`d`, by .. math:: :label: 7.66 @@ -275,9 +275,9 @@ where :math:`f_{c}` is a threshold below which no single connected inundated are .. math:: :label: 7.70 - q_{out,h2osfc}=k_{h2osfc} \ f_{connected} \ (Wsfc-Wc)\frac{1}{\Delta t} + q_{out,h2osfc}=k_{h2osfc} \ f_{connected} \ (W_{sfc}-W_c)\frac{1}{\Delta t} -where :math:`q_{out,h2osfc}` is the surface water runoff, :math:`k_{h2osfc}` is a constant, :math:`Wc` is the amount of surface water present when :math:`f_{h2osfc} =f_{c}`, and :math:`\Delta t` is the model time step. The linear storage coefficent :math:`k_{h2osfc} = \sin \left(\beta \right)` is a function of grid cell mean topographic slope where :math:`\beta` is the slope in radians. +where :math:`q_{out,h2osfc}` is the surface water runoff, :math:`k_{h2osfc}` is a constant, :math:`W_c` is the amount of surface water present when :math:`f_{h2osfc} =f_{c}`, and :math:`\Delta t` is the model time step. The linear storage coefficient :math:`k_{h2osfc} = \sin \left(\beta \right)` is a function of grid cell mean topographic slope where :math:`\beta` is the slope in radians. .. _Infiltration: @@ -508,22 +508,22 @@ The bulk soil layer saturated hydraulic conductivity is then computed as The soil organic matter properties implicitly account for the standard observed profile of organic matter properties as .. math:: - :label: 1.101 + :label: 7.87 \theta_{sat,om} = max(0.93 - 0.1\times z_{i} / zsapric, 0.83). .. math:: - :label: 1.102 + :label: 7.88 B_{om} = min(2.7 + 9.3\times z_{i} / zsapric, 12.0). .. math:: - :label: 1.103 + :label: 7.89 \psi_{sat,om} = min(10.3 - 0.2\times z_{i} / zsapric, 10.1). .. math:: - :label: 1.104 + :label: 7.89b k_{sat,om} = max(0.28 - 0.2799\times z_{i} / zsapric, k_{sat,\, \min } \left[z_{h,\, i} \right]). @@ -921,7 +921,7 @@ Sublimation of ice is limited to the amount of ice available. Runoff from glaciers and snow-capped surfaces ------------------------------------------------- -All surfaces are constrained to have a snow water equivalent :math:`W_{sno} \le W_{cap} = 10,000` kg m\ :sup:`-2`. For snow-capped columns, any addition of mass at the top (precipitation, dew/riping) is balanced by an equally large mass flux at the bottom of the snow column. This so-called capping flux is separated into solid :math:`q_{snwcp,ice}` \ and liquid :math:`q_{snwcp,liq}` runoff terms. The partitioning of these phases is based on the phase ratio in the bottom snow layer at the time of the capping, such that phase ratio in this layer is unaltered. +All surfaces are constrained to have a snow water equivalent :math:`W_{sno} \le W_{cap} = 10,000` kg m\ :sup:`-2`. For snow-capped columns, any addition of mass at the top (precipitation, dew/ripening) is balanced by an equally large mass flux at the bottom of the snow column. This so-called capping flux is separated into solid :math:`q_{snwcp,ice}` \ and liquid :math:`q_{snwcp,liq}` runoff terms. The partitioning of these phases is based on the phase ratio in the bottom snow layer at the time of the capping, such that phase ratio in this layer is unaltered. The :math:`q_{snwcp,ice}` runoff is sent to MOSART (Chapter :numref:`rst_MOSART`) where it is routed to the ocean as an ice stream and, if applicable, the ice is melted there. From 537f2c5497e3d7e0dd7e5f599eae3f35078517fc Mon Sep 17 00:00:00 2001 From: Yifan Cheng Date: Thu, 28 May 2026 16:17:41 -0600 Subject: [PATCH 2/8] review hydrology document --- .../Hydrology/CLM50_Tech_Note_Hydrology.rst | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst index df773ae414..703a83bfe5 100644 --- a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst +++ b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst @@ -118,7 +118,7 @@ Canopy snow unloading from wind speed :math:`u` and above-freezing temperatures q_{unl,\, tot} =\min \left( q_{unl,\, wind} +q_{unl,\, temp} ,W_{can,\, sno} \right) -where :math: `f_{unl,wind,sno}` is a fraction of snow unloaded from canopy due to wind. The canopy liquid water and snow water equivalent are updated as +where :math:`f_{unl,wind,sno}` is a fraction of snow unloaded from canopy due to wind. The canopy liquid water and snow water equivalent are updated as .. math:: :label: 7.15 @@ -170,7 +170,7 @@ The total rate of liquid and solid precipitation reaching the ground is then .. math:: :label: 7.20 - q_{grnd,ice} =q_{thru,\, ice} +q_{drip,\, ice} +q_{unl,\, tot} . + q_{grnd,ice} =q_{thru,\, ice} +q_{drip,\, ice} +q_{unl,\, tot} Solid precipitation reaching the soil or snow surface, :math:`q_{grnd,\, ice} \Delta t`, is added immediately to the snow pack (Chapter :numref:`rst_Snow Hydrology`). The liquid part, :math:`q_{grnd,\, liq} \Delta t` is added after surface fluxes (Chapter :numref:`rst_Momentum, Sensible Heat, and Latent Heat Fluxes`) and snow/soil temperatures (Chapter :numref:`rst_Soil and Snow Temperatures`) have been determined. @@ -181,11 +181,16 @@ The wetted fraction of the canopy (stems plus leaves), which is required for sur f_{wet} = \left\{\begin{array}{lr} - \left[\frac{W_{can} }{p_{liq}\left(L+S\right)} \right]^{{2\mathord{\left/ {\vphantom {2 3}} \right.} 3} } \le 1 & \qquad L+S > 0 \\ + \left[\frac{W_{can} }{p_{liq}\left(L+S\right)} \right]^{{2\mathord{\left/ {\vphantom {2 3}} \right.} 3} } \le f_{wet}^{max } & \qquad L+S > 0 \\ 0 &\qquad L+S = 0 \end{array}\right\} -while the fraction of the canopy that is dry and transpiring is +.. math:: + :label: 7.200 + + W_{can} = W_{can,\, liq} + W_{can,\, sno} + +where :math:`f_{wet}^{max }` is the maximum wetted fraction of the canopy, an adjustable parameter. Default value is :math:`f_{wet}^{max }` = 0.05. The fraction of the canopy that is dry and transpiring is .. math:: :label: 7.22 From 27de2a37f925e3049eb51f3744805f684cee126d Mon Sep 17 00:00:00 2001 From: Yifan Cheng Date: Fri, 29 May 2026 11:55:39 -0600 Subject: [PATCH 3/8] fix equation labels --- doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst index 703a83bfe5..feafd1a18f 100644 --- a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst +++ b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst @@ -186,7 +186,7 @@ The wetted fraction of the canopy (stems plus leaves), which is required for sur \end{array}\right\} .. math:: - :label: 7.200 + :label: W_can_calc W_{can} = W_{can,\, liq} + W_{can,\, sno} @@ -528,7 +528,7 @@ The soil organic matter properties implicitly account for the standard observed \psi_{sat,om} = min(10.3 - 0.2\times z_{i} / zsapric, 10.1). .. math:: - :label: 7.89b + :label: sat_hydraulic_conductivity_organic k_{sat,om} = max(0.28 - 0.2799\times z_{i} / zsapric, k_{sat,\, \min } \left[z_{h,\, i} \right]). From 06f6eca9833ce514145376d2bffd285a4f1c61d3 Mon Sep 17 00:00:00 2001 From: Samuel Levis Date: Mon, 8 Jun 2026 14:04:12 -0700 Subject: [PATCH 4/8] Update doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst Remove unnecessary semi-colon --- doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst index feafd1a18f..9c97892f89 100644 --- a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst +++ b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst @@ -12,7 +12,7 @@ The total water balance of the system is \begin{array}{l} {\Delta W_{can,\,liq} +\Delta W_{can,\,sno} +\Delta W_{sfc} +\Delta W_{sno} +} \\ {\sum _{i=1}^{N_{levsoi} }\left(\Delta w_{liq,\, i} +\Delta w_{ice,\, i} \right)+\Delta W_{a} =\left(\begin{array}{l} {q_{rain} +q_{sno} -E_{v} -E_{g} -q_{over} } \\ {-q_{h2osfc} -q_{drai} -q_{rgwl} -q_{snwcp,\, ice} } \end{array}\right) \Delta t} \end{array} -where :math:`q_{rain}` is the liquid part of precipitation, :math:`q_{sno}` is the solid part of precipitation, :math:`E_{v}` is ET from vegetation (Chapter :numref:`rst_Momentum, Sensible Heat, and Latent Heat Fluxes`), :math:`E_{g}` is ground evaporation (Chapter :numref:`rst_Momentum, Sensible Heat, and Latent Heat Fluxes`), :math:`q_{over}` is surface runoff (section :numref:`Surface Runoff`), :math:`q_{h2osfc}` is runoff from surface water storage (section :numref:`Surface Runoff`), :math:`q_{drai}` is sub-surface drainage (section :numref:`Lateral Sub-surface Runoff`), :math:`q_{rgwl}` and :math:`q_{snwcp,ice}` are liquid and solid runoff from glaciers and lakes, and runoff from other surface types due to snow capping (section :numref:`Runoff from glaciers and snow-capped surfaces`) (all in kg m\ :sup:`-2` s\ :sup:`-1`), :math:`N_{levsoi}` is the number of soil layers (note that hydrology calculations are only done over soil layers 1 to :math:`N_{levsoi}`; ground levels :math:`N_{levsoi} +1` \ to :math:`N_{levgrnd}` are currently hydrologically inactive; :ref:`(Lawrence et al. 2008) ` and :math:`\Delta t` is the time step (s). +where :math:`q_{rain}` is the liquid part of precipitation, :math:`q_{sno}` is the solid part of precipitation, :math:`E_{v}` is ET from vegetation (Chapter :numref:`rst_Momentum, Sensible Heat, and Latent Heat Fluxes`), :math:`E_{g}` is ground evaporation (Chapter :numref:`rst_Momentum, Sensible Heat, and Latent Heat Fluxes`), :math:`q_{over}` is surface runoff (section :numref:`Surface Runoff`), :math:`q_{h2osfc}` is runoff from surface water storage (section :numref:`Surface Runoff`), :math:`q_{drai}` is sub-surface drainage (section :numref:`Lateral Sub-surface Runoff`), :math:`q_{rgwl}` and :math:`q_{snwcp,ice}` are liquid and solid runoff from glaciers and lakes, and runoff from other surface types due to snow capping (section :numref:`Runoff from glaciers and snow-capped surfaces`) (all in kg m\ :sup:`-2` s\ :sup:`-1`), :math:`N_{levsoi}` is the number of soil layers (note that hydrology calculations are only done over soil layers 1 to :math:`N_{levsoi}`; ground levels :math:`N_{levsoi} +1` \ to :math:`N_{levgrnd}` are currently hydrologically inactive :ref:`(Lawrence et al. 2008) ` and :math:`\Delta t` is the time step (s). .. _Figure Hydrologic processes: From 16e3c7d1dc462afb899e178f12cc3f27644bcdda Mon Sep 17 00:00:00 2001 From: Samuel Levis Date: Mon, 8 Jun 2026 14:05:54 -0700 Subject: [PATCH 5/8] Update doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst Replace "alpha's" with "alpha coefficients" --- doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst index 9c97892f89..6f5023c49b 100644 --- a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst +++ b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst @@ -49,7 +49,7 @@ where :math:`f_{pi,\,liq}` and :math:`f_{pi,\,ice}` are the fractions of interce f_{pi,\,ice} =\alpha_{sno} \ \left\{1-\exp \left[-0.5\left(L+S\right)\right]\right\} \ , -and :math:`L` and :math:`S` are the exposed leaf and stem area index, respectively (section :numref:`Phenology and vegetation burial by snow`), and the :math:`\alpha`\'s scale the fractional area of a leaf that collects water (:ref:`Lawrence et al. 2007 `). Default values of :math:`\alpha_{liq}` and :math:`\alpha_{sno}` are set to 1. Throughfall (kg m\ :sup:`-2` s\ :sup:`-1`) is also divided into liquid and solid phases, reaching the ground (soil or snow surface) as +:math:`L` and :math:`S` are the exposed leaf and stem area index, respectively (section :numref:`Phenology and vegetation burial by snow`), and the :math:`\alpha`\ coefficients scale the fractional area of a leaf that collects water (:ref:`Lawrence et al. 2007 `). Default values of :math:`\alpha_{liq}` and :math:`\alpha_{sno}` are set to 1. Throughfall (kg m\ :sup:`-2` s\ :sup:`-1`) is also divided into liquid and solid phases, reaching the ground (soil or snow surface) as .. math:: :label: 7.4 From 585bc4f12e6db1a8a64d8d4eedc95775d5cf7c66 Mon Sep 17 00:00:00 2001 From: Samuel Levis Date: Mon, 8 Jun 2026 14:07:28 -0700 Subject: [PATCH 6/8] Update doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst Replace ephemeral eq. number with permanent description --- doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst index 6f5023c49b..7078a7771b 100644 --- a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst +++ b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst @@ -523,7 +523,7 @@ The soil organic matter properties implicitly account for the standard observed B_{om} = min(2.7 + 9.3\times z_{i} / zsapric, 12.0). .. math:: - :label: 7.89 + :label: sat_matric_potential_org \psi_{sat,om} = min(10.3 - 0.2\times z_{i} / zsapric, 10.1). From 2699150ce8645a98adb2d705418d5bc31654032f Mon Sep 17 00:00:00 2001 From: Samuel Levis Date: Mon, 8 Jun 2026 14:07:50 -0700 Subject: [PATCH 7/8] Update doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst Replace another ephemeral eq. number with permanent description --- doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst index 7078a7771b..43fa06dcfc 100644 --- a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst +++ b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst @@ -518,7 +518,7 @@ The soil organic matter properties implicitly account for the standard observed \theta_{sat,om} = max(0.93 - 0.1\times z_{i} / zsapric, 0.83). .. math:: - :label: 7.88 + :label: hydr_cond_exponent_org B_{om} = min(2.7 + 9.3\times z_{i} / zsapric, 12.0). From 74875d1b72d4d9dccd045d357c44c9fec527e722 Mon Sep 17 00:00:00 2001 From: Samuel Levis Date: Mon, 8 Jun 2026 14:08:07 -0700 Subject: [PATCH 8/8] Update doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst Replace one more ephemeral eq. number with permanent description --- doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst index 43fa06dcfc..9fc02de49c 100644 --- a/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst +++ b/doc/source/tech_note/Hydrology/CLM50_Tech_Note_Hydrology.rst @@ -513,7 +513,7 @@ The bulk soil layer saturated hydraulic conductivity is then computed as The soil organic matter properties implicitly account for the standard observed profile of organic matter properties as .. math:: - :label: 7.87 + :label: porosity_org \theta_{sat,om} = max(0.93 - 0.1\times z_{i} / zsapric, 0.83).