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Add exception when emergence is negative in SimpleMPD model #379

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Jan 17, 2024
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Add exception when emergence is negative in SimpleMPD model #379

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20 changes: 17 additions & 3 deletions model/Transmission/Anopheles/SimpleMPDAnophelesModel.h
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Original file line number Diff line number Diff line change
Expand Up @@ -103,8 +103,8 @@ class SimpleMPDAnophelesModel : public AnophelesModel
{
bool fitted = AnophelesModel::initIterate();

int y1 = sim::oneYear(), y2 = sim::fromYearsI(2), y3 = sim::fromYearsI(3), y4 = sim::fromYearsI(4),
y5 = sim::fromYearsI(5);
int y1 = sim::oneYear(), y2 = sim::fromYearsI(2), y3 = sim::fromYearsI(3), y4 = sim::fromYearsI(4), y5 = sim::fromYearsI(5);

assert((int)mosqEmergeRate.size() == y1);

for (int t = 0; t < y1; t++)
Expand All @@ -123,6 +123,11 @@ class SimpleMPDAnophelesModel : public AnophelesModel

virtual double getEmergenceRate(const SimTime &d0, const std::vector<double> &mosqEmergeRate, double nOvipositing)
{
// // Get emergence at start of step:
// SimTime dYear1 = mod_nn(d0, sim::oneYear());
// // Simple model: fixed emergence scaled by larviciding
// return mosqEmergeRate[dYear1];

// Simple Mosquito Population Dynamics model: emergence depends on the
// adult population, resources available, and larviciding.
// See: A Simple Periodically-Forced Difference Equation Model for
Expand All @@ -133,7 +138,16 @@ class SimpleMPDAnophelesModel : public AnophelesModel
double emergence = probPreadultSurvival * yt / (1.0 + invLarvalResources[mod_nn(d0, sim::oneYear())] * yt);
nOvipositingDelayed[util::mod_nn(d1, developmentDuration)] = nOvipositing;
quinquennialOvipositing[util::mod_nn(d1, sim::fromYearsI(5))] = nOvipositing;
return emergence;

if (emergence < 0)
{
std::ostringstream oss;
oss << "Error: SimpleMPD model: negative emergence at t=" << d0 << ": " << emergence << ". ";
oss << "Check the seasonality and make sure it does not go too low. For monthly EIR values, the lowest point should not be below 1% of the peak EIR.";
throw util::base_exception(oss.str());
}

return std::max(emergence, 0.0);
}

///@brief Interventions and reporting
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