Precipitation & Interception

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Presentation transcript:

Precipitation & Interception Ali Fares Chapter 2 11/15/2018 Watershed Hydrology NREM 662 Dr. A. Fares.

Watershed Hydrology NREM 662 Dr. A. Fares. Finish the lecture Lab: how to spatially distribute rainfall and calculate average rainfall rate using two methods: Thiessen Polygon Method Isohyeth method Lab assignment. 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Rainfall Spatial Distribution PRIZM model Site-specific Interpolation 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Estimation 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Estimation 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Estimation 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Estimation 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Estimation 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Estimation 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Estimation 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Estimation 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Watershed Hydrology NREM 662 Dr. A. Fares. Missing Data 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Watershed Hydrology NREM 662 Dr. A. Fares. Missing Data 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Rainfall Interception Interception: Ic = Pg – Th – Sf 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Rainfall Interception Conifer forests in North America Ic = 15-40% of Pg Natural teak forests in Thailand Ic = 65% of Pg Is influenced by rain: amount, duration, intensity, and pattern 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Rainfall Distribution & Intensity Watershed Hydrology NREM 662 Dr. A. Fares.

Rainfall Canopy Interception 60% 40% 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Measurement Rain gauges storage, weighing, tipping-bucket Problems obstacles, wind eddies, evaporation 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Measurement 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Tipping-Bucket: Demonstration From the Automated Flood Warning System web site. 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Measurement Under Canopy Outside Canopy 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Watershed Hydrology NREM 662 Dr. A. Fares. 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Watershed Hydrology NREM 662 Dr. A. Fares. 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Measurement 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Measurement The Standard Fog Collector (Schemenauer and Cereceda, 1994) 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.

Precipitation Measurement 11/15/2018 Fall 2006 Watershed Hydrology NREM 662 Dr. A. Fares.