共查询到20条相似文献，搜索用时 15 毫秒
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提出了基于GIS网格化的河长制信息化系统信息资源模型,该模型以河湖体系为核心,以河长制行政区划分段,形成河湖模型,并设计各类型数据目录存储结构,使各类数据与主体河湖模型对象关联;同时利用GIS空间数据处理方法,根据行政区划将分级管辖河段对象空间网格化,形成基于河湖模型的GIS空间网格化河湖资源空间数据对象,利用GIS的空间分析功能,将不同类型的数据资源与对应段的河湖资源对象自动关联,从而提供数据服务,支撑整个河长制监测监管信息的运转。模型应用于长沙市河长制信息化管理系统,实现了基于\"互联网+\"的河湖治理信息化工作模式,极大提高了河长制信息化工作的效率。 相似文献
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浅谈水资源需求管理技术在黄河流域的应用 总被引：1，自引：0，他引：1
在对水资源需求管理的内涵进行探讨的基础上,针对目前黄河流域水资源可持续利用面临的主要问题,分析了黄河流域实施需求管理的必要性。从行政管理、水价制定、经济激励、节水技术推广及节水诱导等方面对黄河流域实施水资源需求管理,对实现高效用水提出了建议。 相似文献
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Rafel Rocaspana Enric Aparicio Antoni Palau‐Ibars Roger Guillem Carles Alcaraz 《河流研究与利用》2019,35(6):646-655
Radiotelemetry was used to investigate seasonal movement and home range of brown trout Salmo trutta (size range 188–420 mm fork length, N = 30) in two reaches of the Noguera Pallaresa River (Ebro Basin, north‐east Spain) subjected to different flow regulation schemes. NP‐1 reach is a bypassed section with near natural flow conditions, whereas the downstream reach NP‐2 is subjected to daily pulsed flow discharge (i.e., hydropeaking) from an upstream hydropower station. Significant differences in home range size (95% kernel estimates) and seasonal movement pattern between study reaches were found. Mean home range size was (μ ± SE) 112.1 ± 11.5 m in the bypassed reach NP‐1 and increased significantly in the hydropeaking reach NP‐2 up to 237.9 ± 37.2 m. There was a large individual variability in fish home range size within reaches. Most of the seasonal differences in fish movement among reaches were associated with the spawning season. Pulsed discharge events in NP‐2 during daytime in summer (lasting about 3 hr and increasing water flow from 1 to 20 m3/s) did not cause significant displacements in either upstream or downstream direction during the duration of the event. Our results highlight the importance of habitat connectivity in hydropeaking streams due to the need of brown trout to move large distances among complementary habitats, necessary to complete their life cycle, compared with unregulated or more stable streams. 相似文献
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River histories provide important guidance with which to inform river management. Evolutionary trajectories and appraisals of system responses to changing flux conditions and disturbance events can be used to determine the range of potential future states and associated behavioural regimes, assessing the likelihood that that these states will be attained over a given timeframe. In these analyses, natural or historical reference reaches may not provide a realistic basis to set target conditions for management actions, as what has gone before does not necessarily provide a complete and reliable picture of prospective future conditions. This paper outlines the use of a conceptual tool, the river evolution diagram, as a geomorphic platform to assess river history and the potential range of river futures for any given system. Evolutionary adjustments of a sand bed river in southeastern Australia are used to demonstrate the application of this approach. Applying adaptive management principles, ‘moving targets’ for river management are framed in relation to the range of likely future states and trajectories of adjustment. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
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灌区工程管理的日常维护与养护工作是保证工程正常运行及效益发挥的基础.在灌区工程日常管养工作中潦河灌区管理局根据自身实际需求,进行试点推进管养承包管理模式,在实践过程中取得了一些经验与成效,同时指出在实际操作中应该注意的问题. 相似文献
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采用美国SAS数据挖掘软件,在对我国防洪调度及水资源管理需求详尽分析的基础上,探索了数据挖掘技术在防洪调度及水资源管理方面的应用理论、方法及技术;研究了商品化数据挖掘软件与防洪调度及水资源管理需求相结合的具体方法,建立了太湖流域和中央节点的防洪调度和水资源管理数据仓库系统;分析研究了数据应用的基本模式,提出了数据挖掘的主题,运用SAS数据挖掘套件建立了基于数据仓库的防洪调度及水资源管理数据挖掘系统。 相似文献
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黄河流域水土保持减沙计算方法存在问题及改进途径探讨 总被引：2，自引：0，他引：2
水文法保法是分析计算汉域治理减水减沙效益常用的两种方法，但都存在一些问题。水文法计算的基础是帮雨沙资料建立的产沙模型，该模型很难准确地反映降雨产沙的自然规律；水保法计算的基础是制定的水土保持措施减沙定额，很难完全符合客观实际。本文从不同途径提出了三种经过改进的计算方法，即小流域天然产流量对比法、坡面综合措施减少沙系统数法和最大可能产沙量法。试算结果表明，在具有必要的前提下，应用这三咱方法分析计算流 相似文献
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Serey Sok Sopheak Meas Sophearin Chea Nyda Chhinh 《Lakes & Reservoirs: Research and Management》2019,24(3):215-227
Benefit sharing is a concept associated with regional cooperation for sustainable water resources management. To this end, the present study analyses how implementation of this concept may contribute to economic growth and the promotion of sustainable livelihoods in the Lower Mekong Basin (LMB). It focuses on the balance between economic and human development, national interests, and the procedures used to manage water resources in the basin. It was found that: (a) Benefits obtained from the Mekong River are not equally shared between riparian countries because of inadequate regional cooperation, with economic and social development in the LMB being uneven, with Thailand and Vietnam achieving better human development, poverty reduction and food security outcomes than Laos and Cambodia; (b) Lack of shared national interests, or a common development agenda, has resulted in unsustainable water resource management outcomes; and (c) Procedures for water resources management agreed by the four LMB countries are well‐aligned with the conceptual framework for benefit sharing defined by Sadoff and Grey (2002, Water Policy, 4, 389), although while these procedures have the potential to facilitate a more cooperative agenda for equitable sharing of social, economic and environmental benefits from the water resources of the Mekong River, implementation of the 1995 Mekong Agreement currently remains controversial. The five procedures for water resource management developed by the Mekong River Commission have not resulted in satisfactory outcomes, due in part to the institution lacking regulatory authority. 相似文献
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Early attempts to gauge streams were used by George Baxter in 1961 to propose a pioneering scheme for deriving and allocating water for what today may be recognized as environmental flows in the United Kingdom, but the approach was not accepted into practice. A fundamental concern was the quality of river flow data. Stream gauging was advanced by the 1963 Water Resources Act, and prior to this, the allocation of water resources to compensation flows below dams was based on the basic principle of one third of the reliable yield, estimated using rainfall data. Despite the increased availability of river flow data since the 1970s, it is suggested that low‐flow data quality has severely constrained the management and allocation of water resources and remains so today. Today, pressures and demands on water resources are increasing, but the accuracy of low‐flow measurement is still hindering the operational determination and implementation of environmentally robust, seasonally variable environmental flows. Successful river regulation and restoration relate to a complex suite of public policy questions and given uncertainty over the quality of low‐flow data, transparent, pragmatic decisions about societal allocations of water need to be made. 相似文献
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以甘肃省疏勒河昌马灌区2002—2010年地下水监测资料,分析地下水水位动态监测资料年际和年内变化趋势,对比不同时间尺度和空间分布下地下水水位资料计算结果。通过数据分析可知,在空间分布上,可以选择区域内某一单井地下水水位动态监测数据代表整个区域地下水水位动态变化情况,这一研究结论,将减少监测井布设密度的争议,可以大大降低监测井布设成本;在时间尺度上,对监测井可以选择年内某一固定时刻的水位数据作为全年监测数据的代表值,这一研究结论,可以减少监测井监测频次,降低监测成本,减少人员投入。通过对疏勒河昌马灌区监测资料的分析,可以以点带面对地下水水位监测管理提出建设性的意见。 相似文献
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Integrated water resources management (IWRM) relies on co-ordination, co-operation and sharing of collected data amongst relevant organizations. This article presents the results of systematic research into non-technical barriers that influence IWRM-related data sharing in transboundary contexts, with a focus on the Mekong River Commission’s procedures for data sharing in Thailand. The current extent of data sharing is quite limited. The main bottlenecks hindering relevant Thai organizations’ sharing data across national boundaries appear to be a perception of limited gains, and concerns for national security. The article concludes that data sharing for IWRM implementation cannot be radically improved without significant changes in the mindsets of the relevant organizations, and suggests how to achieve this. 相似文献
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The fall Chinook Salmon (Oncorhynchus tshawytscha) population that spawns in the Hanford Reach of the Columbia River, USA is paradoxical because it is located above 4 and below 10 main stem Columbia River dams and yet is one of the largest and most productive C. salmon populations in the Pacific Northwest. A synthesis of information collected in the Hanford Reach reveals that the hydrosystem above the Hanford Reach and the management of river flows may have contributed to the recent size and productivity of this salmon population. Mechanisms for high survival and capacity at each freshwater life stage have been identified. Plausible mechanisms for contributing to high spawning capacity include: (a) more spawning habitat available during the spawning period. Plausible mechanisms for high egg‐to‐presmolt survival include: (a) reduced desiccation of redds, (b) reduced scour of redds, (c) reduced sedimentation in redds, (d) improved flow exchange within redds, and (e) increased food availability. Smolt survival may also be enhanced through the large size they attain in the Hanford Reach. This synthesis of information provides an uncommon assessment of some the positive effects of flow management from hydropower dams on a valued native fish that has occurred over the last three decades. WIREs Water 2018, 5:e1275. doi: 10.1002/wat2.1275 This article is categorized under:
- Water and Life > Stresses and Pressures on Ecosystems
- Water and Life > Conservation, Management, and Awareness