1. Chapter 8 – Water Resource Planning

2. 8.1 Introduction Water is critical for life Climate change is exacerbating the normal weather patterns Use LCA to reveal inefficiencies Water in LCA – Water as impact – resource used in mfg – Water as functional unit – provide a service

3. 8.2 Water as an Indicator Could sum water use like we would sum CO2 emissions Or handle like fossil fuels depleted Difficulty with applying to specific site – Rice grown in Arkansas – Rice grown in New Mexico

4. 8.2 - Eutrophication Eutrophication potential – maybe looking at N or P transport – Assessing potential environmental damage Way to characterize water – Use – water utilized and returned Maybe expand system boundary to include other uses – Consumption – water used and denied to others – Depletion – water is not renewed by hydrological cycle

5. 8.2 Difficulties with Water Use How to handle location specific – Arid area – Humid area

6. 8.3 Synthetic Water Systems Water saving options – Greywater use due to drought – Rain barrels Water treatment steps – Primary removes sand, oils, fats – Secondary removes biological content and detergents using fixed film or suspended growth systems – Tertiary removes residual toxins and nutrient through filter, wetlands or lagoons – Final is UV, chlorination, or ozone

7. Fig 8.5 Horne et al., 2009

8. 8.5 Conclusions Finite supply of drinking water Water as an indicator of system impact is difficult to interpret – Inventory item, not directly environmental damage Problems with seasonality of rainfall – People expect water all the time – Drought – Water storage needs