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Storage Asset Editor

Dam Data Configuration

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Water allocations, rainfall-runoff assumptions, and balance outputs.

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Edit dam operating assumptions

Keep water allocation, storage configuration, watershed inputs, and computed balance indicators aligned without changing the existing dam workflow.

Water allocation Watershed inputs Balance outputs
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Allocated Water Summary
Note: {% trans "This section lists assets and resource nodes that allocate water to this dam for the selected year." %}

Water Allocation

Total Allocated: 0 Mm³
Available for Allocation: 0 Mm³

Calculated Water Balance

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Rainfall-Runoff modelling

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Calculation Guide

Aquifer Water Balance Components

This modal explains how each term in the aquifer editor is derived, which values are auto-summed from allocations, and how to interpret the net annual groundwater balance in million cubic meters per year.

The section mixes three kinds of values: direct user inputs, fields derived from form geometry and climate values, and fields that are automatically aggregated from incoming or outgoing water allocations. Unless noted otherwise, all fluxes are annual and expressed in Mm³/year.

1. Core annual bookkeeping equation

\[ \Delta S = Q_{\mathrm{in}} - Q_{\mathrm{out}} \] \[ Q_{\mathrm{in}} = R_{\mathrm{rain}} + R_{\mathrm{art}} + R_{\mathrm{irr}} + R_{\mathrm{ww}} + Q_{\mathrm{river\to aq}} + Q_{\mathrm{lat,in}} + Q_{\mathrm{leak,in}} \] \[ Q_{\mathrm{out}} = Q_{\mathrm{irr,use}} + Q_{\mathrm{drink}} + Q_{\mathrm{ind}} + Q_{\mathrm{aq\to river}} + Q_{\mathrm{lat,out}} + Q_{\mathrm{leak,out}} + E + Q_{\mathrm{springs}} \]

A positive storage change means the aquifer gains water over the year. A negative value indicates depletion.

2. Rainfall infiltration

\[ R_{\mathrm{rain}} = A \times P \times f_{\mathrm{inf}} \times 10^{-3} \]
  • A is the aquifer area in km².
  • P is annual rainfall in mm/year.
  • f_inf is the rainfall infiltration rate between 0 and 1.

The factor 10^-3 converts km² × mm into million m³. This is the only water-balance field in the section that is recalculated directly from area and rainfall inputs inside the browser.

3. Incoming recharge summed from allocations

\[ R_{\mathrm{irr}} = \sum v_i \quad \text{for incoming irrigation-source allocations} \] \[ R_{\mathrm{ww}} = \sum v_j \quad \text{for incoming wastewater-source allocations} \] \[ Q_{\mathrm{river\to aq}} = \sum v_k,\qquad Q_{\mathrm{lat,in}} = \sum v_m \]
  • Irrigation recharge sums incoming volumes whose source type is IRRIGATED_PERIMETER, SMSI, PI, FARM, or GREENHOUSE.
  • Wastewater recharge sums incoming volumes from wastewater assets or plants.
  • Flow from river sums incoming river or surface-water allocations.
  • Lateral inflow sums incoming groundwater-to-groundwater transfers.

These values are not typed manually in the balance card. They are refreshed from the allocated-water accordion and resource allocation inputs.

4. Outgoing uses and exports summed from allocations

\[ Q_{\mathrm{irr,use}} = \sum v_n,\quad Q_{\mathrm{drink}} = \sum v_p,\quad Q_{\mathrm{ind}} = \sum v_q \] \[ Q_{\mathrm{aq\to river}} = \sum v_r,\qquad Q_{\mathrm{lat,out}} = \sum v_s \]
  • Irrigation consumption sums outgoing allocations to irrigation assets.
  • Drinking-water supply sums outgoing allocations to CITY and VILLAGE assets.
  • Industrial supply sums outgoing allocations to FACTORY, INDUSTRIAL_ZONE, and FOOD_PROCESSING assets.
  • Flow to river and lateral outflow are aggregated from outgoing resource allocations.

The form treats these as delivered or exported water volumes. They reduce groundwater storage in the annual balance.

5. Manual loss and discharge terms

\[ Q_{\mathrm{manual,out}} = Q_{\mathrm{leak,out}} + E + Q_{\mathrm{springs}} \]
  • Leakage inflow and leakage outflow represent vertical exchange with upper or lower layers.
  • Evaporation is entered directly as an annual volume lost from shallow groundwater or exposed water surfaces linked to the aquifer.
  • Springs outflow represents natural discharge leaving the aquifer through springs.

These terms are not auto-derived from allocations in the current form. They are user-specified boundary conditions.

6. Storage, capacity, and related helper equations

\[ T = K \times b \] \[ S_{\mathrm{total}} = A \times b \times S_c \] \[ S_{\mathrm{usable}} = 0.8 \times S_{\mathrm{total}} \]
  • Transmissivity T is calculated from hydraulic conductivity K and saturated thickness b.
  • Total storage capacity uses area, thickness, and the storage coefficient.
  • The browser-side helper sets usable storage to 80% of total storage.

These capacity calculations support interpretation of the balance but are not themselves inflow or outflow terms.

7. Sustainability and operational availability

\[ \mathrm{Score}_{\mathrm{form}} = \min\!\left(\frac{R_{\mathrm{nat}} + R_{\mathrm{art}}} {\max(Q_{\mathrm{ext}}, 1)},\, 1\right) \]
  • The hidden form score compares annual recharge plus artificial recharge against current extraction rate.
  • The backend model applies a stricter score: it penalizes declining water-table trend and overdraft status.
  • The Water Allocation box uses a user-editable available volume as an operational cap for allocations; it is not automatically recomputed from the balance card.

That distinction matters: the annual balance describes hydrologic gain or loss, while the available-volume field is the management constraint used when allocating water to assets and resources.

8. Compact worked structure for checking a year

\[ \Delta S = \left( R_{\mathrm{rain}} + R_{\mathrm{art}} + R_{\mathrm{irr}} + R_{\mathrm{ww}} + Q_{\mathrm{river\to aq}} + Q_{\mathrm{lat,in}} + Q_{\mathrm{leak,in}} \right) - \left( Q_{\mathrm{irr,use}} + Q_{\mathrm{drink}} + Q_{\mathrm{ind}} + Q_{\mathrm{aq\to river}} + Q_{\mathrm{lat,out}} + Q_{\mathrm{leak,out}} + E + Q_{\mathrm{springs}} \right) \]

When the sign is negative, demand and discharge exceed recharge and the aquifer is effectively mined during that year. When the sign is positive, recharge and return flows exceed withdrawals and losses.

Implementation note: the automatic sums in this modal mirror the current client-side logic in the aquifer editor. Incoming and outgoing allocation categories are matched by asset or resource type labels.