eng11-fall06-mt1-Masanet-soln

eng11-fall06-mt1-Masanet-soln - DEPARTMENT OF CIVIL AND...

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1 DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING UNIVERSITY OF CALIFORNIA, BERKELEY E11 ENGINEERED SYSTEMS AND SUSTAINABILITY, FALL 2006 M IDTERM E XAM S OLUTIONS (T OTAL : 100 POINTS ) Name: ______________________________ Student ID: __________________________ Instructions: Answer the questions that follow directly on these pages in the spaces provided. Use the back of the page if you need more room for your answer. If you believe there is insufficient information provided to answer a question completely, state reasonable additional assumptions clearly and proceed from there. This exam is closed-book/closed-notes. No calculator is needed. Time: 50 minutes. Do not write in this space Question Points Grade 1a 6 1b 6 1c 3 2a 9 2b(i) 4 2b(ii) 10 3a 10 3b 6 3c 6 4a 4 4b 4 4c 3 4d 6 5a 3 5b 4 5c 8 5d 8 Total 100 Bonus a 6 Bonus b 4 Exam Total
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2 Q UESTION 1: S USTAINABILITY (15 POINTS ) a) Define (in 1-3 sentences) the term “sustainable development.” (6 points) Answer: Either of the two definitions below, which were discussed in class, is acceptable. Also acceptable are reasonable variants of the two definitions below, which capture the general idea of meeting society’s development needs in a way that preserves the long-term integrity of ecological systems. 1) “Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.” 2) "Improving the quality of life while living within the carrying capacity of ecosystems. This manner of living uses no more resources than can be naturally replenished.” Grading: 6 points for either of the answers above or a reasonable variant; 4-5 points for providing an answer that didn’t fully capture the general idea of sustainable development; 0 points for no answer or no reasonable effort. Feedback: No major problems. Note that it is important to address improving the quality of life while preserving ecosystem integrity and not to ignore temporal (i.e., time) considerations (i.e., that the manner of development must preserve ecosystem integrity both now and in the future ). Also, development must not compromise the ability of future generations to meet their needs (“not compromising the needs of future generations,” which means something entirely different, was a common mistake). b) Explain briefly why the consumption of a resource that can be considered renewable (for example, wood or fishes) can in fact be non-sustainable. (6 points) Answer: There are several acceptable answers for this question. Examples of how the consumption of a renewable resource can be non-sustainable include: consuming the resource faster than it can be replenished, harvesting the resource in manner that damages other vital parts of the ecosystem (e.g., clear cutting of forests or bottom trawling for fishes), and when potentially non-sustainable resource inputs (e.g., fertilizers, diesel fuel) are required in the life cycle of the renewable resource. Grading:
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This note was uploaded on 05/08/2011 for the course CE 11 taught by Professor Horvath during the Spring '11 term at Berkeley.

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eng11-fall06-mt1-Masanet-soln - DEPARTMENT OF CIVIL AND...

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