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Chung -Chen <br />Dr. Yen has more than 30 years of experience in the field of water <br />resources engineering, specializing in hydrology, hydraulics, and <br />groundwater modeling. His work experience includes rainfall analysis, <br />rainfall -runoff modeling, detention basin flood routing analysis, <br />floodplain evaluations and mapping, and drainage facility deficiency <br />and mitigation studies. He has extensive knowledge of local hydrology <br />procedures for Southern CA counties including the County of Orange, <br />County of Los Angeles, County of San Bernardino, County of Riverside, <br />County of San Diego and County of Ventura. Chung -Chen has <br />been involved in the implementation of the San Diego County 2003 <br />hydrology manual procedures for Advanced Engineering Software. <br />Chung -Chen has extensive hands-on experience in applying HEC-1, <br />HEC-HMS, HEC-2, HEC-RAS, HEC-GeoRAS, WSPG, HEC-SSP, <br />HEC-FDA, and other hydrology/hydraulic computer programs on <br />various studies and projects. Dr. Yen has been continuously involved <br />in numerical analysis and model development. He is the co-author of <br />the U.S.G.S. DHM (Diffusion Hydrodynamic Model) and co-author of <br />various papers on the development and application of the Complex <br />Variable Boundary Element Method. <br />Master Plan of Drainage, City of Santa Ana, CA. Project Engineer. Dr. <br />Yen was the Project Engineer on this drainage study. The efforts involved <br />setting up the hydrologic link -node models, developing multiple storm <br />events hydrology with deficiency and mitigation analysis of the existing <br />storm drain systems, and cost analysis for the proposed storm drain <br />Master Plan of Drainage, City of Laguna Beach, CA. Project <br />Engineer. Dr. Yen was the Project Engineer on this drainage study. The <br />efforts involved setting up the hydrologic link -node models, developing <br />multiple storm events hydrology with deficiency and mitigation analysis <br />of the existing storm drain systems, and cost analysis for the proposed <br />Master Plan of Drainage, City of Yucaipa, CA. Project Engineer. Dr. <br />Yen was the Project Engineer on this drainage study. The efforts involved <br />setting up the hydrologic link -node models, developing multiple storm <br />events hydrology with deficiency and mitigation analysis of the existing <br />storm drain systems, and cost analysis for the proposed storm drain <br />TETRA TECH <br />