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Pollutant Load Estimate

Estimates annual Total Suspended Solids (TSS), Total Phosphorus (TP), and Total Nitrogen (TN) pollutant loads from urban catchments using the Event Mean Concentration (EMC) method. Computes annual runoff volume as V = C*P*A*10 and multiplies by EMC values per MUSIC guidelines and Australian Runoff Quality to support water-sensitive urban design.

inputs

6 fields

context

4 archetypes

engine

both

outputs

4 scored fields

contract fields

Parameter Map

6 inputs to 4 scored outputs

  • catchment_area_ha

    float

    Contributing catchment area A

    0.5 to 500ha

  • annual_rainfall_mm

    floatfrom archetype

    Mean annual rainfall P

    200 to 3000mm

  • runoff_coefficient

    floatfrom archetype

    Volumetric runoff coefficient C (fraction of rainfall that becomes runoff)

    0.05 to 0.95-

  • emc_tss_mg_l

    floatfrom archetypehidden in hard

    Event mean concentration of Total Suspended Solids

    10 to 400mg/L

  • emc_tp_mg_l

    floatfrom archetypehidden in hard

    Event mean concentration of Total Phosphorus

    0.05 to 1mg/L

  • emc_tn_mg_l

    floatfrom archetypehidden in hard

    Event mean concentration of Total Nitrogen

    0.3 to 5mg/L
annual_runoff_volume_m3tol 0.03

Annual runoff volume V (m³/yr)

tss_load_kg_yrtol 0.03

Annual Total Suspended Solids load (kg/yr)

tp_load_kg_yrtol 0.03

Annual Total Phosphorus load (kg/yr)

tn_load_kg_yrtol 0.03

Annual Total Nitrogen load (kg/yr)

visibility contract

Difficulty Ladder

all_giveneasy

All parameters given directly — straightforward EMC load calculation

all fields visible
all_givenmedium

All parameters given but industrial or commercial land use with higher EMC values — agent must handle larger numbers carefully

all fields visible
partialhard

EMC values hidden — agent must infer typical concentrations from land use type and site description

emc_tss_mg_lemc_tp_mg_lemc_tn_mg_l

scenario bands

Archetype Atlas

residential_suburb

4 contexts

Residential suburban catchment with moderate impervious fraction and typical domestic pollutant sources

catchment_area_ha5 to 100
annual_rainfall_mm600 to 1200
runoff_coefficient0.4 to 0.7
emc_tss_mg_l100 to 200

sydney-western-suburbs / melbourne-southeast-growth / brisbane-northern-suburbs / perth-southern-corridor

commercial_centre

4 contexts

Commercial or mixed-use town centre with high impervious fraction and heavy traffic

catchment_area_ha1 to 50
annual_rainfall_mm600 to 1400
runoff_coefficient0.7 to 0.95
emc_tss_mg_l120 to 250

sydney-cbd-fringe / melbourne-docklands / brisbane-fortitude-valley / adelaide-north-terrace

industrial_estate

4 contexts

Industrial estate with high impervious cover and elevated pollutant concentrations from warehousing and logistics

catchment_area_ha2 to 200
annual_rainfall_mm400 to 1200
runoff_coefficient0.6 to 0.9
emc_tss_mg_l150 to 400

sydney-smithfield-industrial / melbourne-western-ring / brisbane-eagle-farm / perth-kwinana-strip

parkland_open_space

4 contexts

Parkland or open space catchment with low impervious fraction and minimal pollutant sources

catchment_area_ha5 to 500
annual_rainfall_mm400 to 2000
runoff_coefficient0.05 to 0.3
emc_tss_mg_l10 to 80

sydney-centennial-park / melbourne-yarra-bend / brisbane-south-bank / canberra-lake-burley-griffin

rendered task

Generation Preview

sydney-western-suburbs-residential-suburb-preview

difficulty
hard
visibility
partial
archetype
residential_suburb
site context
sydney-western-suburbs
instruction excerptpollutant-load-estimate_calc.py

visible fields

  • catchment_area_ha5 to 100 ha
  • annual_rainfall_mm600 to 1200 mm
  • runoff_coefficient0.4 to 0.7 -

withheld schema

emc_tn_mg_lemc_tp_mg_lemc_tss_mg_lannual_runoff_volume_m3tss_load_kg_yrtp_load_kg_yrtn_load_kg_yr
Residential suburban catchment with moderate impervious fraction and typical domestic pollutant sources. sydney-western-suburbs. Required outputs: annual_runoff_volume_m3, tss_load_kg_yr, tp_load_kg_yr, tn_load_kg_yr