Is it necessary to get a masters in environmental engineering for a bachelor's degree in drainage? Is it helpful for getting into a design institute?

It is necessary. Nowadays, most of the design institutes require a graduate degree, so you can consider getting a master's degree in municipal engineering, which will help you get into a design institute.

Water Supply And Drainage (WSD) is one of the engineering disciplines, referred to as water supply and drainage. Water Supply and Drainage Science and Engineering generally refers to urban water supply systems, drainage systems (municipal water supply and drainage and building water supply and drainage), or simply water supply and drainage.

Water supply and drainage engineering studies a social cycle of water." Water supply": a modern water supply plant, every day from the rivers and lakes in the extraction of natural water, the use of a series of physical and chemical means of water purification for production, living water standards for tap water, and then through the well-connected urban water network, the tap water will be transported to thousands of households." Drainage": an advanced sewage treatment plant, our production, life used sewage, wastewater centralized treatment, and then discharged into the rivers and lakes clean. This process of water intake, treatment, transportation, reprocessing, and then discharge is the main content of water supply and drainage engineering to be studied.