tailieunhanh - Handbook of Water and Wastewater Treatment Plant Operations - Chapter 15

Nguồn uống nước Lượng mưa đi qua bề mặt của trái đất bề mặt dòng chảy. Mùa xuân một tính năng bề mặt mà không có sự giúp đỡ của các vấn đề người đàn ông nước, từ đá hoặc đất vào đất hoặc vào một cơ thể của nước, nơi phát hành là tương đối hạn chế kích thước. Lượng mưa quá trình mà theo đó độ ẩm không khí được thải vào lớp vỏ của trái đất. Lượng mưa có dưới dạng mưa, tuyết, mưa đá và mưa đá. Quyền nước, được mua theo quy định của pháp luật,. | Part IV Water and Water Treatment 2003 by CRC Press LLC 15 Potable Water Source Because of huge volume and flow conditions the quality of natural water cannot be modified significantly within the body of water. Accordingly humans must augment nature s natural processes with physical chemical and biological treatment procedures. Essentially this quality control approach is directed to the water withdrawn which is treated from a source for a specific use. INTRODUCTION Before presenting a discussion of potential potable water supplies available to us at the current time it is important that we define potable water Potable water is water fit for human consumption and domestic use which is sanitary and normally free of minerals organic substances and toxic agents in excess of reasonable amounts for domestic usage in the area served and normally adequate in quantity for the minimum health requirements of the persons served. In regards to a potential potable water supply the key words are quality and quantity. If we have a water supply that is unfit for human consumption we have a quality problem. If we do not have an adequate supply of quality water we have a quantity problem. In this chapter we discuss the surface water and groundwater hydrology and the mechanical components associated with collection and conveyance of water from its source to the public water supply system for treatment. We also discuss development of well supplies. To better comprehend the material presented in this chapter we have provided the following list of key terms and their definitions. Key Terms and Definitions Surface water the water on the earth s surface as distinguished from water underground groundwater . Groundwater subsurface water occupying a saturated geological formation from which wells and springs are fed. Hydrology the applied science pertaining to properties distribution and behavior of water. Permeable a material or substance that water can pass through. Overland .