SEDIMENT CONTROL AT WATER INTAKES
在野外把脏水过滤成清水英语作文
在野外把脏水过滤成清水英语作文Filtering Dirty Water into Clean Water in the WildWhen exploring the great outdoors, one of the most important things to remember is to stay hydrated. However, clean water sources may not always be readily available, and you may find yourself in a situation where you need to filter dirty water into clean, drinkable water. In this article, we will discuss some methods for filtering dirty water into clean water in the wild.1. BoilingOne of the simplest and most effective ways to filter dirty water is by boiling it. By bringing the water to a rolling boil for at least one minute (or three minutes at higher altitudes), you can kill off any harmful bacteria and parasites that may be present in the water. After boiling, allow the water to cool before consuming it.2. FiltrationAnother method for filtering dirty water is through filtration. You can use a portable water filter or a filtering device such as a LifeStraw to remove impurities and contaminants from the water.These devices are lightweight and easy to carry, making them perfect for outdoor adventures.3. Chemical PurificationChemical purification methods, such as using water purification tablets or drops, can also be effective in filtering dirty water into clean water. These tablets and drops contain chemicals that kill off harmful bacteria and viruses, making the water safe to drink.4. Improvised Filtration MethodsIf you don't have access to a portable water filter or purification tablets, you can use improvised filtration methods to filter dirty water into clean water. You can create a makeshift filter using materials such as clothing, sand, and charcoal to remove sediment and impurities from the water.5. Solar Water DisinfectionSolar water disinfection, also known as SODIS, is another effective method for filtering dirty water into clean water. By placing a clear plastic bottle filled with water in direct sunlight for six hours, UV rays from the sun will kill off any harmful microorganisms present, making the water safe to drink.In conclusion, when you're out in the wild and in need of clean water, there are several methods you can use to filter dirty water into clean, drinkable water. Whether you choose to boil the water, use filtration devices, chemical purification methods, improvised filtration methods, or solar water disinfection, it's crucial to ensure that the water you're drinking is safe and free from harmful contaminants. Staying hydrated is essential for survival in the outdoors, so take the necessary precautions to filter dirty water into clean water and stay healthy during your outdoor adventures.。
在野外把脏水过滤成清水英语作文
在野外把脏水过滤成清水英语作文Surviving in the wilderness can be a daunting challenge, especially when it comes to accessing clean drinking water. One crucial skill that can mean the difference between life and death is the ability to filter dirty water and make it potable. This essay will explore the process of transforming murky, contaminated water into a clear, purified source that is safe for consumption.When venturing into remote, natural environments, it is essential to be prepared for the possibility of encountering only undrinkable water sources. Surface water such as lakes, rivers, and streams can often be polluted with a variety of contaminants, including bacteria, protozoa, and even chemical pollutants. Consuming this untreated water can lead to severe gastrointestinal illnesses, dehydration, and other life-threatening conditions. Therefore, having the knowledge and equipment to effectively filter dirty water is a critical survival skill.The first step in the water filtration process is to gather the necessary materials. This typically includes a water container, a filter, and a means of boiling or disinfecting the filtered water. A sturdy, wide-mouthed bottle or canteen can serve as the water container. The filter can range from a simple cloth or bandana to a more advanced personal water filtration system. These filters often utilize physical barriers, chemical treatments, or a combination of both to remove impurities.Once the materials are gathered, the next step is to collect the dirty water. It is important to avoid stagnant or murky water sources, as they are more likely to contain a higher concentration of contaminants. Instead, seek out moving water bodies, such as streams or rivers, as they tend to have a lower sediment load and fewer microorganisms.With the dirty water collected, the filtration process can begin. If using a cloth or bandana as a filter, start by thoroughly rinsing the material to remove any loose fibers or debris. Then, carefully pour the water through the filter, allowing the impurities to be trapped while the cleaner water passes through. Repeat this process several times, using a clean section of the filter each time, until the water appears visibly clearer.For more advanced filtration systems, the process may involve additional steps. Many personal water filters utilize a combination of physical and chemical methods to remove a wide range of contaminants. These filters often have multiple stages, such as a pre-filter to remove larger particles, a membrane filter to trap smaller microorganisms, and an activated carbon element to adsorb chemicals and improve the taste of the water.Regardless of the filtration method used, it is crucial to ensure that the water is thoroughly disinfected before consumption. This can be accomplished through boiling, chemical treatment, or the use of a UV light purifier. Boiling the water for at least one minute is an effective way to kill any remaining pathogens, while chemical treatments, such as chlorine tablets or iodine drops, can provide an additional layer of protection.The benefits of being able to filter dirty water in the wilderness are numerous. Not only does it ensure access to a safe, potable water source, but it also reduces the risk of contracting waterborne illnesses that can be debilitating or even life-threatening. This skill can be particularly valuable in emergency situations, such as natural disasters or hiking/camping trips, where access to clean water may be limited.Moreover, the ability to filter water can also have broader environmental implications. By reducing the need to rely on bottled water or other pre-packaged sources, individuals can minimize their carbon footprint and contribute to the sustainability of natural resources. Additionally, the filtration process can help to preserve theintegrity of delicate ecosystems by preventing the introduction of contaminants into sensitive water bodies.In conclusion, the skill of filtering dirty water into clean, drinkable water is a crucial survival technique for anyone venturing into the wilderness. By understanding the process, gathering the necessary materials, and properly disinfecting the filtered water, individuals can ensure their safety and reduce the risk of waterborne illnesses. This valuable knowledge not only enhances personal well-being but also has the potential to contribute to the broader environmental stewardship of our natural resources.。
提高节水意识英语
提高节水意识英语Water is the most precious resource on our planet, essential for sustaining life and supporting the thriving ecosystems that we depend on. However, the global water crisis is a pressing issue that affects communities around the world, with many regions facing water scarcity, pollution, and unsustainable water management practices. As the world's population continues to grow and the impacts of climate change become more severe, it is crucial that we take action to raise awareness of the importance of water conservation and implement strategies to use this vital resource more responsibly.One of the primary reasons why water conservation is so crucial is the simple fact that freshwater resources are finite. While the Earth's surface is covered in water, the vast majority of it is saltwater found in the oceans, which is not suitable for human consumption or agricultural use. Only a small fraction of the world's water supply is freshwater, and much of this is locked away in glaciers, ice caps, and deep underground aquifers. As demand for water continues to rise, driven by factors such as population growth, industrialization, andexpanding agricultural needs, the strain on these limited freshwater resources is becoming increasingly unsustainable.Moreover, the uneven distribution of water resources around the world exacerbates the challenges of water scarcity. Some regions, such as the Middle East and parts of Africa, are naturally arid and have limited access to reliable sources of freshwater. In contrast, other areas may experience seasonal fluctuations in water availability, with periods of abundance followed by prolonged droughts. This imbalance in water distribution can lead to conflicts over access to this essential resource, as communities and nations compete for dwindling supplies.In addition to the physical constraints on water availability, water quality is also a major concern. Pollution from industrial waste, agricultural runoff, and inadequate sanitation systems can contaminate water sources, rendering them unfit for human consumption or agricultural use. This problem is particularly acute in developing countries, where access to clean water and proper wastewater treatment infrastructure is often limited. The consequences of water pollution can be severe, leading to the spread of waterborne diseases, environmental degradation, and economic disruption.To address these pressing challenges, it is essential that we raiseawareness of the importance of water conservation and promote sustainable water management practices. This can be achieved through a multi-pronged approach that involves education, policy reforms, technological innovations, and individual behavioral changes.One key aspect of raising awareness is educating the public, especially young people, about the value of water and the need to use it responsibly. This can be done through school curricula, public awareness campaigns, and community-based initiatives that highlight the importance of water conservation and provide practical tips for reducing water usage in daily life. By fostering a deeper understanding of the water crisis and the individual's role in addressing it, we can empower people to make more conscious choices about their water consumption and become advocates for sustainable water management.In addition to public education, policy reforms and government-led initiatives can also play a crucial role in promoting water conservation. This may include the implementation of water-pricing schemes that incentivize efficient water use, the development of stricter regulations on water pollution and wastewater treatment, and the investment in infrastructure projects that improve water storage, distribution, and recycling. Governments can also provide financial incentives and support for the adoption of water-efficienttechnologies, such as low-flow plumbing fixtures, drought-resistant landscaping, and advanced irrigation systems.Furthermore, the private sector and technological innovations can contribute significantly to water conservation efforts. Businesses can adopt water-saving practices in their operations, invest in water-efficient technologies, and promote water conservation among their employees and customers. Researchers and engineers can develop innovative solutions, such as desalination plants, water-recycling systems, and advanced irrigation methods, that can help communities and industries use water more efficiently and sustainably.Ultimately, the success of water conservation efforts will depend on the collective action of individuals, communities, businesses, and governments. By raising awareness of the water crisis and empowering people to make meaningful changes in their water usage, we can work towards a more sustainable future where water is valued, protected, and used responsibly. Only through a concerted and multifaceted approach can we ensure that this precious resource is available for generations to come.。
英语作文金刚水有毒
英语作文金刚水有毒Title: Toxic Contamination in Kong Water。
Water contamination poses a severe threat to public health and environmental sustainability. Recently, concerns have been raised regarding the toxicity of water sourced from the Kong River. This issue demands immediate attention and comprehensive measures to safeguard both human health and ecological balance.Firstly, it is imperative to acknowledge the gravity of the situation. The presence of toxins in Kong River wateris a pressing concern that necessitates urgent action. Various pollutants, including industrial waste,agricultural runoff, and untreated sewage, contribute to the contamination of this vital waterway. The accumulation of harmful substances poses significant risks to aquatic life and human well-being.One of the primary pollutants found in Kong River wateris heavy metals. These toxic elements, such as lead, mercury, and cadmium, originate from industrial activities and urban runoff. The discharge of untreated wastewater containing heavy metals not only jeopardizes the health of aquatic organisms but also contaminates the water supply used for irrigation and drinking purposes. Prolonged exposure to heavy metals can lead to severe health issues, including neurological disorders, organ damage, and even cancer.Furthermore, the presence of agricultural pesticidesand fertilizers exacerbates the problem of water contamination in the Kong River. Runoff from agricultural lands carries a cocktail of chemicals, including herbicides, insecticides, and nitrogen-based fertilizers, into thewater system. These substances not only disrupt the natural balance of aquatic ecosystems but also pose risks to human health through the consumption of contaminated water and aquatic organisms.The contamination of Kong River water also has far-reaching consequences for the environment. Aquaticecosystems suffer as pollutants degrade water quality, diminish biodiversity, and disrupt ecological processes. Fish populations decline, aquatic plants wither, and sensitive habitats deteriorate in the face of pollution. Moreover, contaminated water poses a threat to terrestrial ecosystems when used for irrigation, leading to soil degradation and reduced agricultural productivity.Addressing the issue of toxic contamination in Kong River water requires a multi-faceted approach. Firstly, stringent regulations must be enforced to control industrial discharge and prevent the release of harmful pollutants into the environment. Industries must adopt cleaner production methods, implement effective waste treatment measures, and adhere to environmental standards to minimize their impact on water quality.Secondly, agricultural practices must be reformed to reduce the use of chemical fertilizers and pesticides. Farmers should adopt sustainable farming techniques, such as organic farming and integrated pest management, to minimize chemical inputs and mitigate runoff pollution.Additionally, the implementation of buffer zones and riparian vegetation along water bodies can help filter out contaminants and improve water quality.Furthermore, investment in water treatment infrastructure is essential to ensure the provision of safe and clean drinking water to communities reliant on the Kong River. Advanced treatment technologies, such as filtration, disinfection, and reverse osmosis, can effectively remove contaminants and safeguard public health. However, equitable access to clean water must be prioritized to address disparities in water quality and ensure social justice.Public awareness and community engagement are also crucial components of efforts to address water contamination in the Kong River. Educating the public about the sources and impacts of water pollution can foster a sense of responsibility and encourage individual and collective action to protect water resources. Community-based initiatives, such as river clean-up campaigns and water quality monitoring programs, empower citizens toactively participate in conservation efforts and hold polluters accountable.In conclusion, the presence of toxic contamination in Kong River water poses significant challenges to human health, environmental integrity, and sustainable development. Urgent action is required to address this pressing issue through regulatory measures, sustainable practices, infrastructure investment, and community engagement. By working together, we can mitigate the impacts of water pollution and ensure the preservation of our precious water resources for future generations.。
如何防范水下困难英语作文
如何防范水下困难英语作文Preventing Underwater Difficulties。
Water activities are enjoyable and exciting, but they also come with risks, especially when it comes to underwater difficulties. To ensure safety, it is crucial to take necessary precautions and be prepared for anypotential challenges that may arise. In this essay, we will discuss how to prevent underwater difficulties and ensure a safe and enjoyable experience.First and foremost, it is essential to have the right equipment when engaging in water activities. Whether you are diving, snorkeling, or swimming, having the proper gear can make all the difference in your safety. Make sure to check your equipment before entering the water, and ensure that everything is in good working condition. This includes checking your mask, fins, snorkel, and any other necessary gear to prevent any malfunctions or accidents.Secondly, it is important to be aware of your surroundings at all times. When underwater, visibility may be limited, so it is crucial to stay alert and payattention to your surroundings. Keep an eye out for any potential hazards, such as strong currents, sharp rocks, or marine life that may pose a threat. By staying vigilant and aware of your surroundings, you can avoid potential dangers and ensure a safe experience.Additionally, it is essential to practice proper diving and swimming techniques to prevent underwater difficulties. If you are not experienced in water activities, consider taking lessons or training to improve your skills and confidence in the water. Knowing how to navigate underwater, control your breathing, and handle emergency situations can make a significant difference in your safety and well-being.Furthermore, it is crucial to always dive or swim witha buddy or in a group. Having a diving or swimming partner can provide an extra layer of safety and support in case of an emergency. Make sure to establish a communication system with your buddy, such as hand signals or verbal cues, toensure that you can communicate effectively underwater. By diving or swimming with a buddy, you can watch out for each other and provide assistance if needed.In conclusion, preventing underwater difficulties requires proper preparation, awareness, and caution. By having the right equipment, staying alert, practicing proper techniques, and diving or swimming with a buddy, you can ensure a safe and enjoyable experience in the water. Remember to always prioritize safety and take necessary precautions to prevent any potential risks or accidents. By following these guidelines, you can enjoy water activities with peace of mind and confidence in your abilities.。
水体悬浮泥沙浓度新型监测方法综述
科 技·TECHNOLOGY68水体悬浮泥沙浓度新型监测方法综述文_肖小妮 北控技术服务（广东）有限公司摘要: 水体悬浮泥沙浓度作为表征水质优劣的一个重要特性，不仅直接影响水质透明度和水色等光学特性，而且对水生生态环境和河口海岸带冲淤演变过程也有显著影响。
因此，水体悬浮泥沙浓度的监测对水体环境具有重要的现实意义。
而传统的过滤称量法虽然具备较高的精度，但存在着耗时长、工作量大、数据不连续及丢失等问题，不再适合于观察复杂的泥沙运动和实地监测。
对此，本文从声学测量、卫星遥感、光学测量等方面分析了近年的悬浮泥沙浓度新型监测方法，并针对目前新型监测方法存在的主要问题，提出了在未来研究中需要改进的内容和建议，有利于悬浮泥沙浓度检测领域新技术的创新和发展。
关键词：悬浮泥沙；浓度；遥感；光学测量；声学测量Review of New Monitoring Methods for Suspended Sediment Concentration in WaterXiao Xiao-ni[ Abstract ] As an important characteristic of water quality, the concentration of suspended sediment not only directly affects the transparency and color of water quality, but also has a significant impact on the aquatic ecological environment and the evolution of estuarine and coastal zone. Therefore, the monitoring of suspended sediment concentration is of great practical significance to the water environment. However, the traditional filter weighing method has high precision, but it has many problems such as long time consuming, heavy workload, data discontinuity and loss. It is no longer suitable for observation of complex sediment movement and field monitoring. In this paper, the new monitoring methods of suspended sediment concentration in recent years are analyzed from the aspects of acoustic measurement, satellite remote sensing and optical measurement. In view of the main problems existing in the current new monitoring methods, the contents and suggestions that need to be improved in the future research are put forward, which is conducive to the innovation and development of new technologies in the field of suspended sediment concentration detection.[ Key words ] suspended sediment; concentration; remote sensing; optical measurement; acoustic measurement河水和海水中的悬浮泥沙浓度是最基础关键的水文和环境参数，直接影响了水体中光照分布、水体透明度、水色等光学特性，进而对水生生态过程产生显著影响。
怎么防止地球缺水英语作文
怎么防止地球缺水英语作文Title: Preventing Water Scarcity on Earth。
Water scarcity is a pressing issue that threatens the well-being of our planet and its inhabitants. To addressthis challenge, various measures can be taken at individual, community, and global levels. In this essay, I will discuss some effective strategies to prevent water scarcity on Earth.Firstly, raising awareness about water conservation is crucial. Education plays a pivotal role in shapingattitudes and behaviors towards water usage. Governments, non-profit organizations, and educational institutions should collaborate to implement comprehensive water conservation programs. These programs can include educational campaigns, workshops, and community outreach initiatives to inform people about the importance of preserving water resources and adopting sustainable practices.Secondly, implementing water-saving technologies and infrastructure is essential. Advancements in technology offer promising solutions for optimizing water use efficiency. For instance, the adoption of drip irrigation systems in agriculture can significantly reduce water wastage compared to conventional irrigation methods. Additionally, investing in water recycling and desalination technologies can provide alternative sources of freshwater, particularly in regions facing severe water scarcity.Furthermore, promoting sustainable agricultural practices is paramount in mitigating water scarcity. Agriculture accounts for a substantial portion of global water consumption, and unsustainable farming practices can exacerbate water stress. Encouraging farmers to adopt practices such as crop rotation, mulching, and precision irrigation can help minimize water usage while maintaining agricultural productivity. Additionally, promoting the cultivation of drought-resistant crops and improving soil management practices can contribute to water conservation efforts.In addition to technological and agricultural interventions, effective water governance is essential for ensuring equitable distribution and sustainable management of water resources. Governments play a central role in formulating and enforcing water policies that prioritize conservation, allocation, and management. Establishing robust regulatory frameworks, instituting water pricing mechanisms, and fostering collaboration among stakeholders are essential components of effective water governance.Moreover, fostering international cooperation iscrucial in addressing transboundary water issues and promoting equitable access to water resources. Shared water basins often span multiple countries, necessitating collaborative approaches to manage and allocate water resources fairly. International agreements, such as the United Nations Watercourses Convention and regional water-sharing agreements, provide frameworks for cooperation and conflict resolution among riparian states.In conclusion, preventing water scarcity requiresconcerted efforts at multiple levels, from individual actions to global initiatives. By raising awareness, adopting water-saving technologies, promoting sustainable agriculture, strengthening water governance, and fostering international cooperation, we can safeguard our planet's precious water resources for future generations. Together, we can work towards a water-secure future for all.。
治理深海污染英语作文
治理深海污染英语作文英文回答：The issue of deep-sea pollution is a pressing concern that requires immediate attention and effective governance. The deep sea, which encompasses the vast and unexplored regions of the ocean, is facing increasing threats from human activities such as oil spills, dumping of waste, and overfishing. These activities have severe consequences for marine ecosystems and biodiversity, and pose a risk to the overall health of our planet.One of the main challenges in governing deep-sea pollution is the lack of awareness and understanding among the general public. Many people are unaware of the extent of the problem and the potential consequences it may have. Therefore, it is crucial to raise awareness through education and outreach programs. For example, schools can incorporate lessons on marine conservation and pollution prevention into their curriculum, and organizations canorganize workshops and seminars to inform the public about the issue. By increasing awareness, we can mobilize public support and encourage individuals to take action to reduce pollution.Another important aspect of governance is the enforcement of regulations and laws. Governments and international organizations should work together to establish and enforce strict regulations on deep-sea activities. For instance, they can impose penalties and fines on companies and individuals found guilty ofpolluting the deep sea. Additionally, surveillance and monitoring systems should be enhanced to detect and prevent illegal activities. By implementing and enforcing regulations effectively, we can deter potential polluters and ensure that the deep sea is protected.Furthermore, international cooperation is essential in addressing deep-sea pollution. The ocean is a shared resource, and pollution in one area can have far-reaching effects on other regions. Therefore, countries should collaborate and share information to develop comprehensivestrategies to combat deep-sea pollution. This can be done through the establishment of international agreements and frameworks, such as the United Nations Convention on the Law of the Sea. By working together, we can pool resources and expertise to tackle this global issue.In conclusion, the governance of deep-sea pollution requires a multi-faceted approach that includes raising awareness, enforcing regulations, and promoting international cooperation. By taking these steps, we can protect the deep sea and ensure its sustainability for future generations.中文回答：深海污染问题是一个紧迫的关注焦点，需要立即采取行动并进行有效治理。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
INTRODUCTION
Riverside water-intake structures are required at many electrical power generation sites and municipal water-treatment facilities. Design of intakes in fluvial settings must consider issues related to erosion and sedimentation. In particular, the structure should be designed in a fashion that minimizes the quantity of bed-load sediment that enters the intake structure. This is important to preserve suitable flow characteristics within pump intakes, prevent clogging and fouling of traveling screens, and eliminate the need for regular maintenance dredging. Strongly three-dimensional flow patterns in the vicinity of riverside intakes prevent simple analyses of the interaction of structure and river geometry on the behavior of sediment. Given the complexity of the problem, physical hydraulic models are often used to examine intake sedimentation issues. Unfortunately, model studies are often performed in a diagnostic fashion after some sedimentation-related problem such as intake shoaling is observed. The mechanics of sediment movement in the fluvial environment has been extensively examined; however, deterministic approaches in estimating erosion and sedimentation rates are hampered by uncertainty in a large number of flow- and sediment-related variables. This is particularly true in the vicinity of intake structures where time-varying, three-dimensional flow is typical. Not only do the velocity and depth in the river channel vary with time, but the quantity of water withdrawn through the intake varies in time as well. The theory of fluid mechanical aspects of submerged vanes and applications of flow-turning vanes for river training are discussed by Odgaard et al. (1990), Odgaard and Wang (1991a,b), Wang (1991), Fukuoka and Watanabe (1993), and Wang et al. (1996). These investigations focused on modifying bed shear-stress distributions using vane-induced stresses, particularly for modifying bed geometries in curved channels. The so-called King's curved vanes to deflect sediment in straight canals from diversion channels are described in detail by Garde and Ranga Raju (1977). The application of submerged flow-turning vanes at water intakes was first reported by Nakato (1984) and Nakato et al. (1990) for shoaling control at MidAmerican Energy IAssoc. Dir., Res. Sci., Iowa Inst. of Hydr. Res.; Adjunct Prof.. Dept. of Civ. and Envir. Engrg., Univ. of Iowa, Iowa City. IA 52242. 2Asst. Prof., Dept. of Civ. and Envir. Engrg., Univ. of Connecticut, Storrs, CT 06269. Note. Discussion open until November 1, 1998. To extend the closing date one month, a written request must be filed with the ASCE Manager of Journals. The manuscript for this paper was submitted for review and possible publication on September 9, 1996. This paper is part of the JourMl 0/ Hydraulic Engineering, Vol. 124, No.6, June 1998. @ASCE, ISSN 0733-9429/98/0006-0589-0596/$8.00 + $.50 per page. Paper No. 14144.
ቤተ መጻሕፍቲ ባይዱ
Company's Council Bluffs Power Station Unit 3. The primary purpose of the vane application for this station was to produce a scour trench in front of the water intake. The objective of the present paper is to provide design recommendations for the placement of flow-modifying structures on the riverward side of intake structures to reduce the flux of bed-load sediments into the structure. Flow modifying structures should be considered an integral part of the design, as the first line of defense against intake shoaling and associated pump-approach flow problems.
SEDIMENT CONTROL AT WATER INTAKES ALONG SAND-BED RIVERS By Tatsuaki Nakato 1 and Fred L. Ogden,2 Members, ASCE
ABSTRACT: Results from five physical hydraulic model studies of riverside water intakes situated along the Missouri River reach between Sioux City, Iowa, and St. Louis, Missouri, are presented. Movable-bed, undistorted Froude-scale models are used to determine the effectiveness of structural modifications in the vicinity of the intake to limit the influx of bed-load sediments. Solutions developed in each case include a series of submerged flow-turning vanes located on the riverward side of the intake. A sediment-barrier wall between the vanes and intake increases the streamwise velocity component, enhancing the effectiveness of flow-turning vanes in maintaining a deep scour trench. Effective solutions determined using physical hydraulic models are verified at the prototype scale, as demonstrated by years of trouble-free operation at locations where the recommended sediment-control measures have been installed. Results presented in this paper provide design guidelines for bedload sediment control at riverside water-intake structures on sand-bed rivers.