Method 1: Estimate a Continuous Concentration Trace

The load integral can be evaluated if one develops an estimator, (throughout this paper, tildes are used to identify estimators), for the concentration at arbitrary time t. There are several ways to do this.

• The Worked Record
• Rating Curves
• Modification 1: Retransformation and Bias Correction Factors
• Modification 2: Bias and Variance of Long-term Transport Estimates
• Modification 3: ``Less-than'' Values
• Modification 4: Time Series and Transfer Function Models