Optimisation of water procurement decisions in an irrigation district: the role of option contracts

Water supply instability is one of the main risks faced by irrigation districts and farmers. Water procurement decision optimisation is essential in order to increase supply reliability and reduce costs. Water markets, such as spot purchases or water supply option contracts, can make this decision process more flexible. We analyse the potential interest in an option contract for an irrigation district that has access to several water sources. We apply a stochastic recursive mathematical programming model to simulate the water procurement decisions of an irrigation district's board operating in a context of water supply uncertainty in south‐eastern Spain. We analyse what role different option contracts could play in securing its water supply. Results suggest that the irrigation district would be willing to accept the proposed option contract in most cases subject to realistic values of the option contract financial terms. Of nine different water sources, desalination and the option contract are the main substitutes, where the use of either depends on the contract parameters. The contract premium and optioned volume are the variables that have a greater impact on the irrigation district's decisions.     

Fifty years of finance research in the Asia Pacific Basin

In this paper, we review the history of scholarly finance research in the Asia Pacific Basin. We do this by analysing the four leading regional finance journals – Accounting and Finance, Australian Journal of Management, International Review of Finance and the Pacific‐Basin Finance Journal – along five dimensions. The five dimensions are the most cited papers, noted authors, impact in terms of practice, research areas and a breakdown in terms of the development of the field according to Kuhnian concepts of normal science, anomalies and extraordinary science. We show that the Asia Pacific journals make a crucial contribution to research and practice both in the region and internationally.     

基于污染指数法的太湖流域水污染治理效果分析

太湖流域水污染治理对我国水环境改善和生态文明建设具有重要的示范作用。为有效掌握太湖流域的水污染情况,以高锰酸盐、氨氮、总磷、总氮等为指标,对2005~2012年太湖流域水质变化趋势及变化原因进行了分析,并通过构建污染指数法对太湖流域水质的污染情况进行了评价。研究结果表明:经过治理,太湖流域水质确实得到改善,但仍然处于重污染范畴,而且水质改善速度缓慢。最后,针对太湖流域水污染现状,提出了相应的污染防治建议。     

川中丘陵农地生态建设研究

从生态学角度研究了川中丘陵农地利用中存在的生态环境问题，认为实施生态建设是川中丘陵农地持续利用的重要途径。提出了进行生态建设的思路。     

江苏省太湖流域农村生活污水治理资金保障研究

农村生活污水治理滞后的主要原因是生活污水收集系统和净化设施建设、运营的资金得不到保障。利用已建成并投入运营项目的相关数据,结合江苏省太湖流域农村人口的现状分布,初步估算农村生活污水治理率达到70%的情景下,污水处理设施建设的资金需求,以及设施全部建成后每年的运营和监管费用,分析资金缺口的解决方案,并提出资金保障的政策建议。     

基于水资源可持续利用的塔里木河流域农业水价管理研究

基于未来塔里木河流域农业水价管理的目标、特征和基本原则,提出塔里木河流域农业水价的管理制度和基本政策建议,以及相关配套管理制度和政策与组织机构建设问题,旨在为塔里木河流域农业水价调整、执行、征收、使用和组织管理等提供借鉴。     

淮河流域农业干旱对粮食产量的影响分析

干旱是制约我国粮食生产的主要因素,严重影响了农产品的生产和粮食安全。以受干旱影响程度较重的淮河流域为研究对象,通过对历史旱情资料的统计分析表明：流域农业干旱灾情随年代的发展逐渐加重,且不同行政区域之间存在较大差异。利用相关数据实证检验了1999～2008年间流域内农业干旱灾害对粮食生产的影响。结果表明,农业干旱灾害对粮食生产具有明显的影响,并提出了相应的政策建议。该分析结果可为淮河流域农业防灾减灾体系建设和粮食安全提供些许的参考和借鉴。     

Economic effects of water recovery on irrigated agriculture in the Murray‐Darling Basin*

In October 2010, the Murray‐Darling Basin Authority (MDBA) proposed that a range of 3000–4000 GL per year, on average, of additional water be made available for the environment in the Murray‐Darling Basin (MDB) to mitigate the effects of what it considers to be inadequate environmental flows. To help quantify the costs of this water reallocation, a hydro‐economic model was constructed based on the 19 regions of the MDB. The model results indicate the following: (i) substantial reductions in surface water extractions of up to 4400 GL per year impose only a moderate reduction on net profits in irrigated agriculture, Basin wide, given competitive water markets, but the effects are much more pronounced in particular regions/catchments and (ii) the costs of the water reallocation are comparable with the amount budgeted by the Australian government to acquire water from willing sellers and increase environmental flows if inter‐regional water trade is unrestricted.     

网络治理视角下我国流域综合管理探讨——以中国乌江流域治理为例

网络治理视角下流域综合管理,这是当今国际流域管理的积极创新实践。文章以中国西南地区长江上游主要支流——乌江的治理进行单案例研究,尝试进行解释性的案例研究,证实网络治理下的流域综合管理是乌江流域乃至中国流域治理的一种可行模式。文章从网络治理与流域综合管理（IRBM）基本理论出发,深入分析了乌江流域科层治理模式产生的主要问题及问题产生的原因,探讨了网络治理视角下乌江流域综合管理跨地区协调和多主体合作机制构建以及制度创新。     

杭州港某港池整体稳定性问题研究

本文以杭州港某港池的整体稳定性为主要研究问题，分别从加固前、施工时和加固后三个时间段分析它的整体稳定性，采用的计算软件是拿大岩土工程边坡分析专业程序SLOPE／W。