{"title":"Cost-effectiveness of mussel farming as a water quality improvement measure: Agricultural, environmental and market drivers","authors":"Raphael Filippelli , Mette Termansen , Berit Hasler , Karen Timmermann , Jens Kjerulf Petersen","doi":"10.1016/j.wre.2020.100168","DOIUrl":"10.1016/j.wre.2020.100168","url":null,"abstract":"<div><p><span>This study aims to understand the economic and bio-physical conditions under which mussel farming<span><span> is a cost-effective mitigation measure to improve water quality related to excess nitrogen in fjords and coastal areas. We set-up a mixed-integer optimization model including every farm in three </span>agricultural catchments surrounding Limfjorden, the largest fjord in Denmark. We include a number of relevant nitrogen abatement measures, including agricultural land-use measures and mussel farming in the sea. The aim is to model the least costly combination of mitigation measures to improve water quality when agricultural, environmental and market conditions vary. We run three scenarios varying environmental conditions for mussel productivity and market opportunities for mussel-based products as organic animal feed. We analyze the resulting marginal abatement costs and draw insights about the potential scale of mussel farming for the different catchments. We show that mussel farming is a cost-effective option for 2 of the 3 catchments, but that decreasing mussel productivity over time may make the measure ineffective for one of the catchments, if a market for feed is not available. The possibility of a market for mussel-based organic feed significantly increases the share of nitrogen reduction done by mussels and decreases overall costs by up to 65%. Ultimately, the results indicate that, for catchments where environmental conditions are adequate, mussel farming can be a cost-effective nutrient reduction measure. Therefore, mussel farming can potentially increase the cost-effectiveness of incentive schemes aimed at reducing </span></span>eutrophication in fjords and coastal waters.</p></div>","PeriodicalId":48644,"journal":{"name":"Water Resources and Economics","volume":"32 ","pages":"Article 100168"},"PeriodicalIF":2.2,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wre.2020.100168","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48848610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
José A. Gómez-Limón, Carlos Gutiérrez-Martín, Nazaret M. Montilla-López
{"title":"Recovering water for the environment during droughts through public water banks within a monopsony-monopoly setting","authors":"José A. Gómez-Limón, Carlos Gutiérrez-Martín, Nazaret M. Montilla-López","doi":"10.1016/j.wre.2020.100163","DOIUrl":"10.1016/j.wre.2020.100163","url":null,"abstract":"<div><p><span>Allocation trade is an instrument that has been widely used to recover water for the environment during periods of scarcity (droughts). This paper proposes a water bank operating within a monopsony-monopoly setting with the dual purpose of reallocating water among farmers and acquiring water for the environment during drought periods. The proposed water bank would be managed by a public agency seeking to maximize economic efficiency generated in purchases and sales of water for agriculture<span> and the efficiency generated by the recovery of water allocations for the environment. An additional, innovative feature of the analysis performed is that it considers the inefficiencies in the economy as a whole caused by public spending on water allocation purchases, measured through the marginal cost of public funds. The potential performance of the proposed water bank is simulated by </span></span>mathematical programming techniques, taking the Guadalquivir River Basin (Southern Spain) as an empirical case study. The results provide evidence that, in terms of economic efficiency, the proposed institutional arrangement outperforms the instruments currently in place to purchase water allocations.</p></div>","PeriodicalId":48644,"journal":{"name":"Water Resources and Economics","volume":"32 ","pages":"Article 100163"},"PeriodicalIF":2.2,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wre.2020.100163","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47897411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fahad Alzahrani , Alan R. Collins , Elham Erfanian
{"title":"Drinking water quality impacts on health care expenditures in the United States","authors":"Fahad Alzahrani , Alan R. Collins , Elham Erfanian","doi":"10.1016/j.wre.2020.100162","DOIUrl":"10.1016/j.wre.2020.100162","url":null,"abstract":"<div><p>This research explores the relationship between episodes of contaminated drinking water and health care expenditures in the United States. The analysis relies on panel data from the 48 contiguous states from 2000 to 2011. We use the population served by public water systems that violate health-based standards of the Safe Drinking Water Act as a proxy for contaminated drinking water. We estimate spatial and non-spatial models and control for factors that may affect per capita health care expenditures including variables that reflect air quality violations along with ability to pay plus demand for and supply of health care services. The results from a Spatial Durbin Model indicate that a 1% decrease in the annual percentage of population exposed to drinking water quality violations is associated with reductions in in-state and regional effects equal to 0.005% and 0.035% of per capita health care expenditures, respectively. While relatively small on a per capita basis, drinking water violations have a larger impact on health care expenditures than air quality violations (whose effects are not statistically different from zero). However, compared to other factors, such as Medicare enrollment and income, the impact of these violations on health care expenditures is small. We find that the cumulative regional health care expenditure impacts from drinking water violations are substantially greater than in-state impacts. Thus, a regional approach is recommended to addressing drinking water quality improvements.</p></div>","PeriodicalId":48644,"journal":{"name":"Water Resources and Economics","volume":"32 ","pages":"Article 100162"},"PeriodicalIF":2.2,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wre.2020.100162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44749060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Johannes Friedrich Carolus , Jette Bredahl Jacobsen , Søren Bøye Olsen
{"title":"The impacts of three dimensions of (dis)similarities on water quality benefit transfer errors","authors":"Johannes Friedrich Carolus , Jette Bredahl Jacobsen , Søren Bøye Olsen","doi":"10.1016/j.wre.2020.100164","DOIUrl":"10.1016/j.wre.2020.100164","url":null,"abstract":"<div><p>Benefit Transfer (BT) is often applied when a primary valuation study is considered too costly or time consuming to conduct. It is commonly assumed that BT performance improves with increasing similarity between study and policy sites. However, no common criteria for defining similarity exist, making it difficult to operationalise the concept of similarity in a practical BT context. We propose a structured framework for distinguishing between different degrees of similarity. In particular, we differentiate between three dimensions: physical, population and attribute similarity. While the first two are often used in the literature, attribute similarity is not. To investigate the impact attribute descriptions have on BT, we define it as whether or not the same ecosystem service categories are emphasised in the valuation studies. Using value estimates for water quality improvements obtained from 17 Choice Experiments conducted in Europe, we empirically test unit value transfer performance along a similarity gradient. The results confirm that increasing physical similarities across commodities and sites generally lead to lower transfer errors. However, when using income adjusted value transfer, we surprisingly find the opposite. Finally, we demonstrate that increasing attribute similarity may offset dissimilarities in terms of the site characteristics.</p></div>","PeriodicalId":48644,"journal":{"name":"Water Resources and Economics","volume":"32 ","pages":"Article 100164"},"PeriodicalIF":2.2,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wre.2020.100164","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47850725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"What do economic water storage valuations reveal about optimal vs. historical water management?","authors":"Majed Khadem , Charles Rougé , Julien J. Harou","doi":"10.1016/j.wre.2020.100158","DOIUrl":"10.1016/j.wre.2020.100158","url":null,"abstract":"<div><p>What is the economic value of storing water for future droughts, and what are the consequences of this valuation for water management? One way to answer this question is to ask: ‘what is the valuation, which if used, would maximize a region's economic use of water?’ This prescriptive valuation can be done by linking classical hydro-economic models to global search methods. Another way to answer this question is to ask: ‘what do historical water management operations reveal about water's economic value?’ Indeed, past reservoir uses reveal the empirical inter-temporal valuations of past water managers. Although they may not have been optimized in a formal sense, in mature water resource systems with economic water demands, reservoir storage rules evolve via a socio-political process to embody societies' valuation of water. This empirical, ‘positive’, or descriptive valuation is captured by calibrating a hydro-economic model such that carry-over storage value functions enable simulated storage to match a historical benchmark. This paper compares both valuations for California's Central Valley revealing that carryover storage values derived from historical operations are typically greater than prescribed values. This leads to a greater reliance on groundwater use in historical operations than would have been achieved with system-wide optimization. More generally, comparing the two approaches to water valuations can provide insights into managers' attitudes as well as the impact of regulatory and institutional constraints they have to deal with – and that are not necessarily included in optimization models.</p></div>","PeriodicalId":48644,"journal":{"name":"Water Resources and Economics","volume":"32 ","pages":"Article 100158"},"PeriodicalIF":2.2,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wre.2020.100158","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41898987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Spatio-temporal design for a water quality monitoring network maximizing the economic value of information to optimize the detection of accidental pollution","authors":"François Destandau , Youssef Zaiter","doi":"10.1016/j.wre.2020.100156","DOIUrl":"10.1016/j.wre.2020.100156","url":null,"abstract":"<div><p>The reduction of damage due to water pollution requires good knowledge of the quality of surface waters. The Water Quality Monitoring Networks (WQMNs) have evolved over time according to the objectives of each one of them: knowledge of long-term quality evolution, search for the origin of pollution, detection of accidental pollution, etc. Information provided by WQMNs could be improved by a spatial approach, optimizing the location or the number of monitoring stations, or by a temporal approach, optimizing the sampling frequency. However, there is a cost for monitoring water quality.</p><p>In this article, we show, for the first time, how the estimation of the Economic Value of Information (EVOI) can be used to determine the spatio-temporal design of the network. With the example of a network that aims to detect accidental pollution, we show how to calculate the EVOI according to the spatial and temporal network design (number and location of stations, temporal accuracy of measurement) and how to define this design by maximizing the EVOI. This will allow us to answer questions such as: Are the expenses invested in the networks justified? With an additional budget, is it better to add a station or to increase the temporal accuracy of the measurement of existing stations? What is the optimal spatial and temporal design of the network when working with a fixed budget?</p></div>","PeriodicalId":48644,"journal":{"name":"Water Resources and Economics","volume":"32 ","pages":"Article 100156"},"PeriodicalIF":2.2,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wre.2020.100156","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43584479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The potential contribution of oyster management to water quality goals in the Chesapeake Bay","authors":"Nikolaos Mykoniatis , Richard Ready","doi":"10.1016/j.wre.2020.100167","DOIUrl":"10.1016/j.wre.2020.100167","url":null,"abstract":"<div><p>Excess nutrients<span> have led to eutrophication<span><span> of the Chesapeake Bay<span>, USA. It has been suggested that oyster restoration can play an important role in achieving water quality goals in the Bay. An optimal control </span></span>bioeconomic<span> model is applied to the management of oysters in the Chesapeake Bay, taking into account nutrient removal by the oysters. Optimal management of oyster harvests in the Bay reduces the cost of attaining water quality goals by 4–6% relative to an open access fishery. A “naïve” management optimization that maximizes discounted net revenues from oyster harvests but that does not take into account their nitrogen impacts performs almost as well as the fully optimal solution. Sensitivity analyses show that the optimal oyster harvest depends on the cost of reducing nitrogen loadings from point and nonpoint sources through best management practices. Further, denitrification by living oysters is a much more important process than nutrient removal through harvest.</span></span></span></p></div>","PeriodicalId":48644,"journal":{"name":"Water Resources and Economics","volume":"32 ","pages":"Article 100167"},"PeriodicalIF":2.2,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wre.2020.100167","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45345322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"WTP for water filters and water quality testing services in Guatemala","authors":"Todd Guilfoos , Sarah Hayden , Emi Uchida , Vinka Oyanedel-Craver","doi":"10.1016/j.wre.2019.01.005","DOIUrl":"10.1016/j.wre.2019.01.005","url":null,"abstract":"<div><p>We conduct a contingent valuation<span> study to estimate the willingness to pay<span> for a point-of-use water quality technology<span><span> and water quality testing services in the highlands of Guatemala. This study is unique in two ways: we measure drinking water quality at the household level through water samples collected at the household and we elicit the willingness to pay for water quality testing services. We find a significant divergence in subjects’ perceptions of water quality and the measured bacteria counts in their household water. This divergence is economically important as perceptions may play a significant role in willingness to pay for </span>water quality improvements.</span></span></span></p></div>","PeriodicalId":48644,"journal":{"name":"Water Resources and Economics","volume":"31 ","pages":"Article 100139"},"PeriodicalIF":2.2,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wre.2019.01.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41927181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Conflicting objectives in groundwater management","authors":"Pereau Jean-Christophe","doi":"10.1016/j.wre.2018.06.001","DOIUrl":"10.1016/j.wre.2018.06.001","url":null,"abstract":"<div><p><span>This paper studies the conflict between economic and environmental sustainability objectives faced by a water agency when she allocates water quotas to farmers. This conflict consists in a water allocation problem between the amount of water claimed by farmers to irrigate their crops and the water flows needed for the conservation and the preservation of the ecosystems. This conflict in objectives is analysed in a dynamic hydro-economic model in discrete-time using the viability approach. The viability kernel that defines the states of the resource yielding intertemporal feasible paths able to satisfy the set of constraints over time is analytically identified. The associated set of viable quota policies and the trade-off between </span>food production and ecosystem conservation objectives are characterized. The theoretical results of the paper are illustrated with numerical simulations based on the Western La Mancha aquifer in Spain.</p></div>","PeriodicalId":48644,"journal":{"name":"Water Resources and Economics","volume":"31 ","pages":"Article 100122"},"PeriodicalIF":2.2,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wre.2018.06.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41996593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jenni Miettinen , Markku Ollikainen , Mika Nieminen , Lauri Valsta
{"title":"Cost function approach to water protection in forestry","authors":"Jenni Miettinen , Markku Ollikainen , Mika Nieminen , Lauri Valsta","doi":"10.1016/j.wre.2019.100150","DOIUrl":"10.1016/j.wre.2019.100150","url":null,"abstract":"<div><p>The European Water Framework Directive (WFD) strongly emphasizes that all water polluting sectors must enhance the protection of water bodies in a cost-effective way. River Basin Management Plans need to be made to achieve a good environmental status for all water bodies by 2027 at the latest. This article examines three principal water protection measures used in forestry: buffer zones, overland flow fields and sedimentation ponds. We analytically develop marginal abatement cost functions for each of these measures and apply them numerically for the Finnish forestry. We find that the marginal abatement costs of nutrients using buffer zones in clear-cut mineral soil forests are very high, as they entail leaving financially mature and uncut trees. In contrast, the marginal costs of using overland flow fields in conjunction with ditch cleaning and clear-cutting in peatlands are very low. Furthermore, for sediments using overland flow fields as a water protection measure entails significantly lower abatement costs than does using sedimentation ponds in conjunction with ditch cleaning in peatland forests. A cost-effective solution in a river basin entails that the highest nutrient reductions are made in agriculture but that forestry also does its share. A cost-effective allocation of abatement measures entails that the proportions of the overall nutrient reduction are 3% (1%) in forestry and 97% (99%) in agriculture when the reduction target is set as 10% (30%).</p></div>","PeriodicalId":48644,"journal":{"name":"Water Resources and Economics","volume":"31 ","pages":"Article 100150"},"PeriodicalIF":2.2,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.wre.2019.100150","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48571315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}