Pond Class Reference

Ponds are defined as freshwater bodies between 25m2 and 5000m2. For newts the effective size is limited to 400m2. More...

#include <elements.h>

Public Member Functions
	Pond (void)
virtual void	DoDevelopment (void)
void	CalcPondPesticide ()
	Calculates the amount of pesticide per unit pond water More...
void	CalcLarvalFood ()
	Calculates the amount of larval food present More...
bool	SubtractLarvalFood (double a_food)
	Called by a larva when feeding, removes an age specific amount of larval food More...
double	SupplyPondPesticide ()
	supply the current pesticide concentration per litre More...
virtual void	SetMaleNewtPresent (bool a_ispresent)
	Sets a male as present/absent. More...
bool	IsMaleNewtPresent ()
	Gets whether there is a male newt as present. More...
Public Member Functions inherited from Freshwater
	Freshwater (void)
Public Member Functions inherited from NonVegElement
	NonVegElement (void)
Public Member Functions inherited from LE
	LE (void)
virtual	~LE (void)
virtual double	GetDayDegrees (void)
	Variable used to record the current grazing pressure by e.g. voles *‍/ double m_volegrazing; /**. More...
virtual double	GetLAGreen (void)
virtual double	GetLATotal (void)
virtual double	GetGreenBiomass (void)
virtual double	GetDeadBiomass (void)
virtual double	GetVegBiomass (void)
virtual double	GetWeedBiomass (void)
virtual double	GetInsectPop (void)
virtual void	SetInsectPop (double)
virtual void	Insecticide (double)
virtual void	InsectMortality (double)
virtual void	ReduceWeedBiomass (double)
virtual void	ToggleCattleGrazing (void)
virtual void	TogglePigGrazing (void)
virtual void	SetVegBiomass (int)
virtual void	SetVegType (TTypesOfVegetation, TTypesOfVegetation)
virtual void	SetVegHeight (double)
virtual void	SetVegParameters (double, double, double, double)
virtual void	SetCropData (double, double, double, TTypesOfVegetation, double, int)
virtual void	SetCropDataAll (double, double, double, double, TTypesOfVegetation, double, double, int, double, bool, double)
virtual void	StoreLAItotal ()
virtual void	SetGrowthPhase (int)
virtual void	ForceGrowthInitialize (void)
virtual void	ForceGrowthTest (void)
virtual void	ForceGrowthDevelopment (void)
virtual void	ZeroVeg (void)
virtual void	ReduceVeg (double)
virtual void	ReduceVeg_Extended (double)
virtual void	GrazeVeg_Extended (double)
virtual double	GetTrafficLoad (void)
virtual TTypesOfVegetation	GetPreviousCrop (int)
bool	GetPoison (void)
void	SetPoison (bool a_poison)
bool	GetHigh (void)
int	GetCattleGrazing (void)
bool	GetPigGrazing (void)
bool	HasTramlines (void)
bool	IsRecentlyMown (void)
int	IsRecentlySprayed (void)
int	GetPoly (void)
	Returns the polyref number for this polygon. More...
int	GetMapIndex (void)
void	SetMapIndex (int a_map_index)
int	GetOwnerFile (void)
int	GetOwnerIndex (void)
int	GetLastTreatment (int *a_index)
Farm *	GetOwner (void)
double	GetArea (void)
double	GetGooseGrazingForage (GooseSpecies a_goose)
double	GetBirdSeed (void)
void	SetBirdSeed (double a_forage)
double	GetBirdMaize (void)
void	SetBirdMaize (double a_forage)
int	GetCountryDesignation (void)
void	SetCountryDesignation (int a_designation)
long	GetOldDays (void)
void	SetOwner (Farm *a_owner, int a_owner_num, int a_owner_index)
void	SetHigh (bool a_high)
void	SetPoly (int a_poly)
void	SetMapValid (bool a_valid)
bool	GetMapValid (void)
void	SetArea (double a_area)
virtual void	GrazeVegetation (double, bool)
virtual void	GrazeVegetationTotal (double)
int	GetSoilType ()
int	GetSoilTypeR ()
void	SetSoilType (int a_st)
void	SetLastSownVeg (TTypesOfVegetation a_tov)
	Records the last vegetation type to be sown. More...
TTypesOfVegetation	GetLastSownVeg ()
	Returns the last vegetation type to be sown. More...
void	SetLastTreatment (int a_treatment)
void	SetSprayedToday (bool a_didit)
bool	GetSprayedToday ()
void	SetCopyTreatment (int a_treatment)
void	SetOldDays (long a_days)
void	SetRotIndex (int a_index)
int	GetRotIndex (void)
void	SetTramlinesDecay (int a_decaytime_days)
void	SetHerbicideDelay (int a_decaytime_days)
void	SetMownDecay (int a_decaytime_days)
void	AddArea (double a_area_diff)
LE *	GetBorder (void)
int	GetUnsprayedMarginPolyRef (void)
void	SetBorder (LE *a_border)
void	SetUnsprayedMarginPolyRef (int a_unsprayedmargin)
void	SetPesticideCell (int a_cell)
int	GetPesticideCell ()
void	SetValidXY (int a_valid_x, int a_valid_y)
int	GetValidX (void)
int	GetValidY (void)
int	GetMaxX (void)
int	GetMaxY (void)
int	GetMinX (void)
int	GetMinY (void)
void	SetMaxX (int x)
void	SetMaxY (int y)
void	SetMinX (int x)
void	SetMinY (int y)
int	GetMDates (int a, int b)
void	SetMDates (int a, int b, int c)
int	GetMConstants (int a)
void	SetMConstants (int a, int c)
double	GetVegDDegs ()
	Get the total of day degrees for the crop/veg on this element. More...
int	GetOpenness (void)
	For goose model functionality, openness score for the polygon. More...
void	SetGooseNos (int a_number, int a_day)
void	SetGooseSpNos (int a_number, int a_day, GooseSpecies a_goose)
void	SetGooseNosTimed (int a_number, int a_day)
void	SetGooseSpNosTimed (int a_number, int a_day, GooseSpecies a_goose)
void	SetGooseRoostDist (int a_dist, GooseSpecies a_goose)
int	GetGooseNosToday ()
	For goose model functionality, returns the number of geese today. More...
int	GetGooseNosTodayTimed ()
	For goose model functionality, returns the number of geese today at a predefined time. More...
int	GetGooseNos ()
	For goose model functionality, returns the number of geese yesterday. More...
int	GetQuarryNos ()
	For goose model functionality, returns the number of geese yesterday which can be hunted as legal quarry. More...
int	GetGooseSpNosToday (GooseSpecies a_goose)
	For goose model functionality, returns the number of geese per species yesterday. More...
int	GetGooseSpNosTodayTimed (GooseSpecies a_goose)
	For goose model functionality, returns the number of geese per species yesterday at a predefined time. More...
int	GetGooseRoostDist (GooseSpecies a_goose)
	For goose model functionality, returns the distance to closest roost. More...
void	SetOpenness (int a_openness)
	Records the openness statistic for this polygon. More...
virtual void	ResetDigestability ()
	sets growth record to zero in descendent classes More...
void	DoCopy (const LE *a_Le)
	a copy function to be used because a copy constuctor won't work More...
void	SetStubble (bool a_flag)
	Sets the in stubble flag. More...
bool	GetStubble ()
	Return the in stubble flag. More...
bool	GetOsmiaNest ()
	Test to see if a nest is found. More...
void	ReleaseOsmiaNest ()
	Test to see if a nest is found. More...
void	UpdateOsmiaNesting ()
	Recalculate the nest finding probability. More...
void	IncOsmiaNesting ()
	Add an occupied nest. More...
void	SetMaxOsmiaNests (double a_noNests)
	Add an occupied nest. More...
void	SetPollenNectarData (int a_almasstype)
	sets the pollen and nectar information More...
virtual PollenNectarQuality	GetPollen ()
virtual PollenNectarQuality	GetNectar ()
virtual double	GetTotalPollen ()
virtual double	GetTotalNectar ()
void	SetPollenNectarCurves (PollenNectarDevelopmentCurve *a_pollencurnve, PollenNectarDevelopmentCurve *a_nectarcurve)
	Set method for pollen and nectar curves. More...

Protected Attributes
double	m_LarvalFood
	The amount of larval food present More...
double	m_LarvalFoodScaler
	The proportion of larval food per m2 More...
double	m_pondpesticide
	Holds the pesticide content per unit pond water. More...
bool	m_MaleNewtPresent
	Flag for presence of a male newt. More...
double	m_pondquality
	a factor used to alter the pond qualities (default behaviour is random 0.0-1.0) More...
Protected Attributes inherited from LE
int	m_ptrace [256]
int	m_pdates [256]
int	m_pindex
long	m_running
LE *	m_border
int	m_unsprayedmarginpolyref
int	m_valid_x
int	m_valid_y
int	m_centroidx
int	m_centroidy
int	m_vege_danger_store
int	m_PesticideGridCell
bool	m_is_in_map
int	m_subtype
int	m_maxx
int	m_minx
int	m_maxy
int	m_miny
long	m_olddays
long	m_management_loop_detect_date
long	m_management_loop_detect_count
Farm *	m_owner
int	m_countrydesignation
int	m_owner_file
int	m_owner_index
int	m_rot_index
bool	m_sprayedtoday
	flag to indicate an overspray situation More...
int	m_poly
	The polyref number for this polygon. More...
int	m_map_index
int	m_almass_le_type
	This holds the ALMaSS element type reference number. More...
int	m_farmfunc_tried_to_do
int	m_tramlinesdecay
int	m_mowndecay
int	m_herbicidedelay
TTypesOfLandscapeElement	m_type
double	m_area
	The element area in m2. More...
int	m_gooseNos [366]
	The number of geese each day. More...
int	m_gooseSpNos [366][gs_foobar]
	The number of geese of each species each day. More...
int	m_gooseNosTimed [366]
	The number of geese at a predefined time per day. More...
int	m_gooseSpNosTimed [366][gs_foobar]
	The number of geese of each species at a predefined time per day. More...
bool	m_instubble
	A flag describing the state of the field from a visual perspective - will be in stubble following a cereal crop until either soil cultivation or March 1st. More...
double	m_birdseedforage
	The grain forage present in KJ/m2. More...
double	m_birdmaizeforage
	The maize forage present in KJ/m2. More...
double	m_goosegrazingforage [gs_foobar]
	The grazing forage present in KJ/min. The last value indicates cereal 1 or not -1. More...
TTypesOfVegetation	m_lastsownvegtype
	Records the last vegegetation type that was sown on the element. More...
int	m_openness
	The openness metric for a field (if any) More...
double	m_dist_to_closest_roost [gs_foobar]
	An array holding the distance to the nearest goose roost. More...
int	m_vegage
int	m_soiltype
int	m_days_since_insecticide_spray
bool	m_high
bool	m_poison
int	m_cattle_grazing
int	m_default_grazing_level
bool	m_pig_grazing
double	m_vegddegs
double	m_yddegs
double	m_ddegs
vector< int >	m_lasttreat
unsigned int	m_lastindex
int	MDates [2][25]
int	MConsts [10]
LE_Signal	m_signal_mask
double	m_OsmiaNestProb
	to record the chance of osmia nesting More...
int	m_maxOsmiaNests
	to record the number of possible osmia nests More...
int	m_currentOsmiaNests
	to record the number of actual osmia nests More...
PollenNectarQuality	m_pollenquality
PollenNectarQuality	m_nectarquality
double	m_totalPollen
double	m_totalNectar
double	m_PollenM2
double	m_NectarM2
PollenNectarDevelopmentCurve *	m_pollencurve
	pointer to the correct pollen curve set More...
PollenNectarDevelopmentCurve *	m_nectarcurve
	pointer to the correct nectar curve set More...

Additional Inherited Members
Public Attributes inherited from LE
int	m_tried_to_do
int	m_squares_in_map
bool	m_skylarkscrapes
	For management testing of skylark scrapes. More...
Static Protected Attributes inherited from LE
static double	m_monthly_traffic []
	Used for birds that feed on grain on cereal fields 3% spill is expected. More...
static double	m_largeroad_load []
static double	m_smallroad_load []

Detailed Description

Ponds are defined as freshwater bodies between 25m2 and 5000m2. For newts the effective size is limited to 400m2.

Currently the only pond 'behviour' is related to provision of food for newt larvae. This is determined daily and can be seasonally adjusted.

Constructor & Destructor Documentation

Pond()

Pond::Pond

(

void

)

                 : Freshwater() {
    m_type = tole_Pond;
    m_LarvalFood = 0.01;
    m_MaleNewtPresent = false;
    if (cfg_randompondquality.value()) m_pondquality = g_rand_uni(); else m_pondquality = 1.0;
}

References cfg_randompondquality(), g_rand_uni, m_LarvalFood, m_MaleNewtPresent, m_pondquality, and LE::m_type.

Member Function Documentation

CalcLarvalFood()

void Pond::CalcLarvalFood

(

)

Calculates the amount of larval food present

The larval food is calculated assuming a logistic equation in the form of Nt+1 = Nt+(N*r * (1-N/K)) t = one day, N is a scaler which is multiplied by a constant and the area of the pond to get the total larval food, K & r are carrying capacity and instantaneous reproductive rate respectively. K can change with season and this is currently hard coded, but could be an input variable later. The values are held in LarvalFoodMonthlyK
The steps in the calculation are:

• Enforce a assumed pond size for newts as maximum 400 m2
• Ensure we never get zero larval food, so there is always something to grow the curve from.
• Back calculate the current scaler value. This is needed because between time steps, food may be eaten by larvae. This is done based on the area and a fixed constant held in cfg_PondLarvalFoodBiomassConst
• Calculate the new scaler based on the logistic equation as described above
• Re-calculate the new total food biomass based on the area and a fixed constant held in cfg_PondLarvalFoodBiomassConst

{
    double area = m_area;
    if (m_area > 400) area = 400;
    const double LarvalFoodMonthlyK[12] = { 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0 };
    // Back calculate the scaler
    m_LarvalFoodScaler = m_LarvalFood / (cfg_PondLarvalFoodBiomassConst.value() * area * m_pondquality);
    // Calculate the new scaler
    m_LarvalFoodScaler = m_LarvalFoodScaler + (m_LarvalFoodScaler*cfg_PondLarvalFoodR.value() * (1 - (m_LarvalFoodScaler / LarvalFoodMonthlyK[g_date->GetMonth() - 1])));
    // Provide some contest competition by preventing all the food from being used up, leaving minimum 1%
    if (m_LarvalFoodScaler < 0.01) m_LarvalFoodScaler = 0.01;
    // Calculate the new food biomass
    m_LarvalFood = m_LarvalFoodScaler * (cfg_PondLarvalFoodBiomassConst.value() * area * m_pondquality);
}

References cfg_PondLarvalFoodBiomassConst(), cfg_PondLarvalFoodR(), LE::m_area, m_LarvalFood, m_LarvalFoodScaler, and m_pondquality.

Referenced by DoDevelopment().

CalcPondPesticide()

void Pond::CalcPondPesticide

(

)

Calculates the amount of pesticide per unit pond water

The pesticide is calculated based on the mean concentration per m2 which is then multiplied by a factor representing run-off from the surroundings or other movements of pesticides through soil into the pond. This method assumes a uniform depth of water, which is then ignored (so can be seen as being part of the run-off factor). The pesticide concentration is calculated each day. These calculations are heavy on CPU time because of the need to search the landscape map for pond 1m2 and sum pesticide. So this has to be set to run by flagging using cfg_calc_pond_pesticide

To create the sum of pesticide the map is searched from min x,y to max x,y coords, and pond cells are summed for their pesticide content. Then the mean found.

We assume a mean pond depth of 1 m, so pesticide per l = m_pondpesticide/1000 to get per litre then multiplied buy the run-off factor

{
    m_pondpesticide = 0.0;
    if (!cfg_calc_pond_pesticide.value())
    {
        return;
    }
    for (int x = m_minx; x <= m_maxx; x++)
    for (int y = m_miny; y <= m_maxy; y++)
    {
        if (g_landscape_p->SupplyPolyRef(x, y) == m_poly) m_pondpesticide += g_landscape_p->SupplyPesticide(x, y, ppp_1);
    }
    m_pondpesticide /= m_area;
    m_pondpesticide *= cfg_pondpesticiderunoff.value()/1000.0;
}

References cfg_calc_pond_pesticide(), cfg_pondpesticiderunoff(), g_landscape_p, LE::m_area, LE::m_maxx, LE::m_maxy, LE::m_minx, LE::m_miny, LE::m_poly, m_pondpesticide, Landscape::SupplyPesticide(), and Landscape::SupplyPolyRef().

Referenced by DoDevelopment().

DoDevelopment()

void Pond::DoDevelopment ( void  )

virtual

DoDevelopment is needed due to special development for this element type, i.e. larval food calculations for newts.

{
    LE::DoDevelopment();
    CalcPondPesticide();
    CalcLarvalFood();
    m_MaleNewtPresent = false;
}

References CalcLarvalFood(), CalcPondPesticide(), and m_MaleNewtPresent.

IsMaleNewtPresent()

bool Pond::IsMaleNewtPresent ( )

inlinevirtual

Gets whether there is a male newt as present.

Reimplemented from LE.

{ return m_MaleNewtPresent; };

References m_MaleNewtPresent.

SetMaleNewtPresent()

virtual void Pond::SetMaleNewtPresent ( bool  a_ispresent )

inlinevirtual

Sets a male as present/absent.

Reimplemented from LE.

{ m_MaleNewtPresent = a_ispresent; };

References m_MaleNewtPresent.

SubtractLarvalFood()

bool Pond::SubtractLarvalFood

(

double

a_food

)

Called by a larva when feeding, removes an age specific amount of larval food

If the total amount of food is low then there is a probability test to determine if food can be found. If failed the return code false means no food was removed. If passed then this removes the amount of food passed in a_food and return true.

{
    m_LarvalFood -= a_food;
    if (m_LarvalFood < 0) return false;
    return true;
}

References m_LarvalFood.

SupplyPondPesticide()

double Pond::SupplyPondPesticide ( )

inline

supply the current pesticide concentration per litre

{ return m_pondpesticide; }

References m_pondpesticide.

Member Data Documentation

m_LarvalFood

double Pond::m_LarvalFood

protected

The amount of larval food present

Referenced by CalcLarvalFood(), Pond(), and SubtractLarvalFood().

m_LarvalFoodScaler

double Pond::m_LarvalFoodScaler

protected

The proportion of larval food per m2

Referenced by CalcLarvalFood().

m_MaleNewtPresent

bool Pond::m_MaleNewtPresent

protected

Flag for presence of a male newt.

Referenced by DoDevelopment(), IsMaleNewtPresent(), Pond(), and SetMaleNewtPresent().

m_pondpesticide

double Pond::m_pondpesticide

protected

Holds the pesticide content per unit pond water.

Referenced by CalcPondPesticide(), and SupplyPondPesticide().

m_pondquality

double Pond::m_pondquality

protected

a factor used to alter the pond qualities (default behaviour is random 0.0-1.0)

Referenced by CalcLarvalFood(), and Pond().

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The documentation for this class was generated from the following files:

• C:/Repo/ALMaSS_all/Landscape/elements.h
• C:/Repo/ALMaSS_all/Landscape/elements.cpp