SERPIS RIVER BASIN Case Study Report - VU University, Institute ...

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scarcity problems lead also to water quality and environmental problems. Other issues that are not addressed in the study are substitution and uncertainty. 34
6. Best practice recommendations. A successful valuation exercise requires an extensive and complete pretest. A pretest was developed (40 interviews), in which we found that the questionnaire was too long, with an average duration of the interviews of 20 minutes. Particularly, we had the feelings that there were too many show cards. After that pretest, we reduced the length of the questionnaire (from 41 questions to 35 questions), mainly removing the contingent valuation questions and redesigning the choice experiment with 6 blocks of 4 cards, in order to reduce the number of cards. Another pretest was developed and we were able to reduce the average duration from 20 minutes to 15 minutes. People were more concentrated, especially when they asked the CE, than in the other design. With regards to the CE design, we suggest: • The credibility of the baseline is a fundamental issue in the validity of the valuation exercise, and need to be carefully tested in the pretest. The requirement of the common questionnaire for all the participants in the “water scarcity group” (as discussed in the previous section) reduces the flexibility to adapt to the local conditions. In any case, our results shown that the scenario created in the survey was considered credible by most of the respondents. • The pictures of the choice experiment, to show to the respondents the different levels of the attributes, must be very clear. People have to be able to distinguish the difference among the different levels. This should be tested carefully. • In the income question, we recommended that each category was identified with a non consecutive letter. • We suggest to translate the annual payment into cost per month for a better understanding of the magnitude of the offered quantity (given also that the water bill is monthly or bi-monthly in most cases, and that it would make it easier for taking into account the budget limitations). • Use of a map to show the basin and the location of the cities where the survey is taking place. Another interesting issue is the influence of the seasonal status of the resources at the time of conducting the survey. Given that the issue under question is water scarcity, the 35
Page 1: Water scarcity valuation under the
Page 4 and 5: Colophone This report is part of th
Page 7 and 8: 1. Introduction This report include
Page 9 and 10: Regulated surface resources 17.0 Mm
Page 11 and 12: 2.4 Main water management and polic
Page 13 and 14: 3. Set up of the survey 3.1 Questio
Page 15 and 16: The questionnaire contains three pa
Page 17 and 18: Figure 6 Interviews Distribution Ga
Page 19 and 20: Figure 9. Alcoy. Gender Distributio
Page 21 and 22: Income Figures 14 and 15 show the a
Page 23 and 24: Table 8.Most important problems.Que
Page 25 and 26: 4.2. Public perception of water man
Page 27 and 28: A 62 % considered that it is (very)
Page 29 and 30: 4.3 Estimated economic values for w
Page 31 and 32: people are more WTP for the environ
Page 33: 5. Conclusions. The study has shown
Page 37 and 38: References: Jucar River Basin Autho
Page 39 and 40: UNIVERSIDAD POLITECNICA DE VALENCIA
Page 49 and 50: CARD 2 ( CHOICE EXPERIMENT) 2.2 10
Page 51: 2.4 CARD 4 (CHOICE EXPERIMENT) 5

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