中文摘要：

随着水利信息化的发展，如何实现不断增加的异构系统的应用集成成为一个新的研究课题。而使用基于模型驱动架构MDA的Web服务组合技术，能够更好地实现水利领域的应用集成。按照MDA方法，给出了使用Petri网来建立Web服务组合的模式，以及组合模型正确性验证的方法，并提出了将Petri网模型影射到可执行的BPEIAWS的方法。通过一个实例，说明了基于MDA的Web服务组合技术在水利领域应用集成中的作用。最后进行了总结，指出了下一步工作。

英文摘要：

With the development of the water resource informatization,how to achieve the application integration of the increased heterogeneous systems is a new topic.Web service composition techniques based on MDA （Model Driven Architecture） can complete the application integration of the water resource area better.ln this paper, according to the MDA method,the familiar patterns of the Web service composition based on Petri nets are given,and the methods that verify the correctness of the service composition are discussed,Then,the Petri net model is mapped into the executable BPEL4WS,The effect of Web service composition techniques in the application integration of the water resource area is showed through a case.Finally,a conclusion is drawn,and the future work is pointed out.