水利部公益性行业科研专项基金资助项目No.201501034-04;陕西省科技统筹创新工程重点实验室项目No.2014SZS15-Z01;云南省交通运输厅科技项目云交科2014 A 01.This work was supported by the Special Funds for Public Industry Research Projects of the Ministry of Water Resources201501034-04,the Key Laboratory Project for Science and Technology Coordination& Innovation Projects of Shaanxi Province2014SZS15-Z01 and the Science and Technology Projects of the Transportation Department of Yunnan Province2014 A 01.