# Integrators and Reservoirs

## Models Illustrating the Use of Integrators and Reservoirs

All the models assigned to the selected category are listed below.

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• #### Competing Demands on a Reservoir

This simple model shows one method for allocating competing demands on a Reservoir.

• #### Dam Breach Hydrograph

Simulate the breach in a dam as it grows through time and the resulting discharge hydrograph

• #### Single Pool Reservoir

Simulate the operation of a simple reservoir with an overflow spillway.

• #### Mono Lake Water Balance

Water balance model illustrating a negative feedback loop and of the use of scenarios with a dashboard

• #### Simple Reservoir Operations

This model illustrates how several methods for calculating a reservoir discharge can be combined into a single model. The methods includes calculations based on fluid physics, lookup tables and volumetrically under low-level conditions.

• #### Moving Averages

This model illustrates how an Integrator can be used to calculate moving averages.

• #### Reservoir Reporting Periods

The purpose of this model is to demonstrate the use of Reporting Periods in GoldSim.

• #### Population Growth Aging Chain

Example model illustrating population dynamics modeling with Discrete Change elements and Integrator arrays

• #### Probability of Buying a Bike

Tutorial model that calculates the probability that Jason can buy a bike given his income and spending

• #### Predator-Prey Models

This example implements several predator-prey models taken from "Modeling the Environment" by Andrew Ford.

• #### Controlling Reservoir Discharge

This model explores 3 different methods of controlling discharge from a reservoir. The difference between these methods is important to understand for models that contain multiple reservoirs where discharge from one is being sent to another.

• #### Simple Inventory Models

This model file includes 5 variations on a simple inventory model. In each case, there is an initial inventory, a sinusoidal demand and a production rate that is constant, stochastic or influenced by feedback.

• #### Computing Warranty Costs

This model illustrates how to use the Convolution element to compute cumulative warranty costs.

• #### Aging Chain

Simulate an aging chain using various methods to keep track of the age structure of a stock of material or items.

• #### Inventory Management

A simple inventory management model that illustrates the structural differences between how such a model is constructed in GoldSim, and how it would be constructed using a classic System Dynamics code.

• #### Insert Time Step Overflow

Compares reservoir outflow and overflow with and without the Advanced Simulation Setting to allow unscheduled updates selected.

• #### Unscheduled Time Steps

This model demonstrates how different Simulation Settings affect the plotted time history results for a simple pond overflow model.