国家科技支撑计划项目No.2012BAD08B05-3;国家自然科学基金项目No.51379150;广东省水利科技项目No.2011-12;Supported by the National Science and Technology Support Project No.2012BAD08B05-3,the National Natural Science Foundation of China No.51379150 and the Guangdong Water Conservancy and Technology ProjectNo.2011-12