Entropy-copula method for single-site monthly streamflow simulation
Article first published online: 13 JUN 2012
©2012. American Geophysical Union. All Rights Reserved.
Water Resources Research
Volume 48, Issue 6, June 2012
How to Cite
2012), Entropy-copula method for single-site monthly streamflow simulation, Water Resour. Res., 48, W06604, doi:10.1029/2011WR011419., and (
- Issue published online: 13 JUN 2012
- Article first published online: 13 JUN 2012
- Manuscript Accepted: 2 MAY 2012
- Manuscript Revised: 26 APR 2012
- Manuscript Received: 18 SEP 2011
- maximum entropy distribution;
- monthly streamflow simulation;
- principle of maximum entropy
 An entropy-copula method is proposed for single-site monthly streamflow simulation. In this method, the joint distribution of adjacent monthly streamflows is constructed using the copula method, whereas the marginal distribution of streamflow for each month is derived using the entropy method. Then, the conditional distribution is derived from which monthly streamflow is generated. Moment statistics of monthly streamflow (such as mean, standard deviation and skewness) can be modeled by the entropy-based marginal distribution while the dependence structure between streamflows of adjacent months can be modeled by the copula-based joint distribution. The proposed entropy-copula method can be extended by incorporating an aggregate variable for modeling the interannual dependence. Application to the simulation of monthly streamflow from the Colorado River illustrates the effectiveness of the proposed method.