This paper analyzed the problems of eco-environment along the ancient Yellow River course and, by combining with the planning scheme of ecological projects of the ancient Yellow River course in Shangqiu City, discusse...This paper analyzed the problems of eco-environment along the ancient Yellow River course and, by combining with the planning scheme of ecological projects of the ancient Yellow River course in Shangqiu City, discussed its ecological planning ways in terms of the principles, objectives, methods and contents of the ecological planning and design to promote the regional eco-environment construction of the ancient Yellow River course.展开更多
With the accelerating process of urbanization in our country, river regulation plays an extremely important role in the operation and development of modern cities. With the continuous improvement of people's livin...With the accelerating process of urbanization in our country, river regulation plays an extremely important role in the operation and development of modern cities. With the continuous improvement of people's living standards, the concepts of ecological energy conservation have been fully applied in the development of modern society and daily life. Therefore, in the process of modern river regulation, relevant units and personnel also need to strengthen the application of ecological water conservancy and other technologies and methods to ensure the ecological health of modern river water environment, to provide high-quality living water for urban residents, and to guarantee the level and quality of people's daily life. Based on this, this paper discusses the urban river ecological management and environmental protection.展开更多
The Kolong,a significant distributary of the mighty river Brahmaputra in Assam,India,has experienced significant human-induced alterations aimed basically for flood mitigation.This study investigates the socio-ecologi...The Kolong,a significant distributary of the mighty river Brahmaputra in Assam,India,has experienced significant human-induced alterations aimed basically for flood mitigation.This study investigates the socio-ecological impacts of the course change of the Kolong River done by the local people of Kahargaon village in Nagaon district of Assam,India.Employing a mixed-methods approach,the research integrates field observations,stakeholder interviews,community forums,and secondary data analysis to assess the river's dynamics and its effects on local livelihoods and ecosystems.The findings reveal that while flood mitigation efforts have provided immediate relief,they have also led to ecological degradation and disrupted traditional livelihoods,particularly those dependent on the river's natural flow.The left-out channel,once rich in biodiversity,now suffers from reduced water levels and a diminished riverine ecological niche,compelling communities to adapt through alternative agricultural practices and grazing.This study emphasizes the need for integrated management strategies that balance flood control with ecological preservation and livelihood sustainability.Thus,the study promotes community-based conservation initiatives,restoring natural flow patterns,and developing adaptive livelihood strategies.The insights gained so far contribute to the broader understanding of human–river interactions and offer valuable lessons for sustainable river management in similar contexts globally.展开更多
Evolution of the river channel downstream of reservoirs is a complex process that is closely related to the operational mode of the reservoirs and the channel boundary conditions Numerous studies have been carried out...Evolution of the river channel downstream of reservoirs is a complex process that is closely related to the operational mode of the reservoirs and the channel boundary conditions Numerous studies have been carried out on the fluvial processes of downstream reservoirs. However, only a few of them have focused on the relationship between runoff-sediment con- ditions and channel pattern indicators. Also, the impacts of river training works on fluvial processes are seldom dealt with. In this paper, the evolutionary processes of three sections in the Lower Yellow River, including Tiexie-Yiluo River mouth reach, Huayuankou-Heigangkou reach and Jiahetan-Gaocun reach, were analyzed for variations in the channel boundary line and the mainstream between 1960 and 2015. Channel pattern indicators such as sinuosity, mainstream wandering range and width/depth ratio were analyzed based on field measure- ments obtained by the Hydrological Department of the Yellow River Conservancy Commis- sion. The effects of river training works on the channel evolution are then described. Since 1960, numerous medium- and large-sized reservoirs have been built on the Yellow River, including Longyangxia Reservoir, Liujiaxia Reservoir and Xiaolangdi Reservoir. These res- ervoirs impound the runoff from upstream and retain the sediment, which changes the runoff and sediment conditions in the downstream reach. As a consequence, annual runoff and the frequency and peak of flooding have all decreased. As a result, the flow dynamics and their action on the river channel are also reduced, which changes the dynamic state of the river course. The discrimination results obtained using the single parameter discrimination rule and the discrimination equation show that the degree of wandering is weakened in the reaches studied. The variations in the channel pattern indicators show that the sinuosity in- creases and the wandering range decreases with a reduction in the total annual volume of water. However, the degree of wandering has little relationship to the sediment concentration. In addition, river training works play an important role in controlling the river course. Due to improvements in the river training works, the river course has become more stable under the same runoff and sediment conditions. A new discrimination rule that takes into account the impacts of the river training works is proposed. The discrimination results were found to fit well with the actual river pattern, which shows that the discrimination rule is applicable to the Lower Yellow River. The results show that the runoff and sediment conditions are the most important factors in the evolution of the river course. The river training works have at the same time limited the wandering range of the mainstream and played an important role in the fluvial processes. Both factors combined lead to the stabilization of the river.展开更多
Three stochastic mathematical models for calculation of the reservoir flood regulation process, river course flood release, and flood risk rate under flood control were established based on the theory of stochastic di...Three stochastic mathematical models for calculation of the reservoir flood regulation process, river course flood release, and flood risk rate under flood control were established based on the theory of stochastic differential equations and features of flood control systems in the middle reach of the Huaihe River from Xixian to the Bengbu floodgate, comprehensively considering uncertain factors of hydrology, hydraulics, and engineering control. They were used to calculate the flood risk rate with flood regulation of five key reservoirs, including the Meishan, Xianghongdian, Nianyushan, Mozitan, and Foziling reservoirs in the middle reach of the Huaihe River under different flood frequencies, the flood risk rate with river course flood release under design and check floods for the trunk of the Huaihe River in conjunction with relevant flood storage areas, and the flood risk rate with operation of the Linhuaigang Project under design and check floods. The calculated results show that （l） the five reservoirs can withstand design floods, but the Xianghongdian and Foziling reservoirs will suffer overtopping accidents under check floods; （2） considering the service of flood storage areas under the design flood conditions of the Huaihe River, the mean flood risk rate with flood regulation of dykes and dams from Xixian to the Bengbu floodgate is about 0.2, and the trunk of the Huaihe River can generally withstand design floods; and （3） under a check flood with the flood return period of 1 000 years, the risk rate of overtopping accidents of the Linhuaigang Project is not larger than 0.15, indicating that it has a high flood regulation capacity. Through regulation and application of the flood control system of the Linhuigang Project, the Huaihe River Basin can withstand large floods, and the safety of the protected area can be ensured.展开更多
The extensive economic development model in the past has caused a lot of damage to the environment, especially to rivers and lakes. Rivers and lakes are the source of the development of civilization. Today, people sho...The extensive economic development model in the past has caused a lot of damage to the environment, especially to rivers and lakes. Rivers and lakes are the source of the development of civilization. Today, people should pay special attention to the environmental management of rivers and lakes. With the rapid development of our society, the public has a profound understanding of the relationship between nature and human beings. Under this background, the concept of river repair and prevention is reflected, and the restoration and protection of river environment has been paid attention to by the public. This paper will point out the problems existing in the current river water environment ecological governance, lead to the governance principles, and on this basis, give the strategies to carry out the river water environment ecological governance.展开更多
Water pollution control is very important to the whole city and the country. If we want to ensure the effect of river water pollution treatment, we need to understand the causes of water pollution first, and then acco...Water pollution control is very important to the whole city and the country. If we want to ensure the effect of river water pollution treatment, we need to understand the causes of water pollution first, and then according to the actual situation of targeted treatment, in order to improve the quality of water pollution treatment work.展开更多
The Yellow River has always been known for"easily silting up,easily bursting its banks,and easily shifting course"and its course has indeed changed many times.It did not undergo any large-scale course change...The Yellow River has always been known for"easily silting up,easily bursting its banks,and easily shifting course"and its course has indeed changed many times.It did not undergo any large-scale course changes during the pre-Qin period,but instead followed the course given in the"Hanzhi汉志(Treatises in the Book of Han)."The river recorded in the Yugong禹贡(Tribute of Yu)is actually the Hanzhi river,and the he(river)recorded in the Yugong that passed through the counties of Xunxian and Neihuang actually followed the former course of the Qi River.The Yellow River’s large-scale course changes began in the Han dynasty.After two thousand years of frequent changes,a 6-15 meters thick layer of sediment formed in the lower reaches of the Yellow River,completely altering the natural landscape of hills,rivers and lakes that had existed in the pre-Qin lower Yellow River,and finally shaping today’s landscape of an endless plain.The course changes brought about a rupture in the development of civilization in this area,with most cities and towns destroyed.The changes in the ecological and living environment around the lower Yellow River over thousands of years were apparently related to the flooding and course changes of the Yellow River,but in reality were caused by human over-exploitation of natural resources.展开更多
The Shandong Xiajin Yellow River Ancient Mulberry Trees System is a model of desertification control in the floor area in the Luxibei Plain,and of sustainable development.The current study about ancient mulberry trees...The Shandong Xiajin Yellow River Ancient Mulberry Trees System is a model of desertification control in the floor area in the Luxibei Plain,and of sustainable development.The current study about ancient mulberry trees in Xiajin county is mainly qualitative representation,lack of quantitative research.In addition,the relevant important ecological functional assessment should not only confine to quantitative assessment which illustrate the current condition,but also analyze the eco-service changes,derived from ecosystem structure develop,from the time dimension.Based on quantitative eco-service assessment of the ancient mulberry tree group,this paper intend to conduct a comprehensive analysis of ecological functions of ancient mulberry group focuses on the perspective of system structure and function evolution.Quantitative evaluation results show that the system has significant eco-efficiency in water conservation,reducing sediment loss,adjust atmosphere,etc.On timescale,thanks to mulberry cultivation,ecosystem structure and services have also undergone a corresponding change.In ecosystem structure：Planting pioneer trees such as mulberries and other species which can tolerate hostile site conditions,improves the micro-environment.This makes it possible for other crops to grow.The mixed forests and the combination of forestry and agriculture protect biodiversity.What＇s more,they make the structure of the ecosystems more robust,giving full play to their functions.In terms of ecosystem services：ecosystem services of Xiajin Yellow River Ancient Mulberry Trees have shown diversified development.And its main function has transferred from supply products to leisure and entertainment functions.展开更多
文摘This paper analyzed the problems of eco-environment along the ancient Yellow River course and, by combining with the planning scheme of ecological projects of the ancient Yellow River course in Shangqiu City, discussed its ecological planning ways in terms of the principles, objectives, methods and contents of the ecological planning and design to promote the regional eco-environment construction of the ancient Yellow River course.
文摘With the accelerating process of urbanization in our country, river regulation plays an extremely important role in the operation and development of modern cities. With the continuous improvement of people's living standards, the concepts of ecological energy conservation have been fully applied in the development of modern society and daily life. Therefore, in the process of modern river regulation, relevant units and personnel also need to strengthen the application of ecological water conservancy and other technologies and methods to ensure the ecological health of modern river water environment, to provide high-quality living water for urban residents, and to guarantee the level and quality of people's daily life. Based on this, this paper discusses the urban river ecological management and environmental protection.
文摘The Kolong,a significant distributary of the mighty river Brahmaputra in Assam,India,has experienced significant human-induced alterations aimed basically for flood mitigation.This study investigates the socio-ecological impacts of the course change of the Kolong River done by the local people of Kahargaon village in Nagaon district of Assam,India.Employing a mixed-methods approach,the research integrates field observations,stakeholder interviews,community forums,and secondary data analysis to assess the river's dynamics and its effects on local livelihoods and ecosystems.The findings reveal that while flood mitigation efforts have provided immediate relief,they have also led to ecological degradation and disrupted traditional livelihoods,particularly those dependent on the river's natural flow.The left-out channel,once rich in biodiversity,now suffers from reduced water levels and a diminished riverine ecological niche,compelling communities to adapt through alternative agricultural practices and grazing.This study emphasizes the need for integrated management strategies that balance flood control with ecological preservation and livelihood sustainability.Thus,the study promotes community-based conservation initiatives,restoring natural flow patterns,and developing adaptive livelihood strategies.The insights gained so far contribute to the broader understanding of human–river interactions and offer valuable lessons for sustainable river management in similar contexts globally.
文摘Evolution of the river channel downstream of reservoirs is a complex process that is closely related to the operational mode of the reservoirs and the channel boundary conditions Numerous studies have been carried out on the fluvial processes of downstream reservoirs. However, only a few of them have focused on the relationship between runoff-sediment con- ditions and channel pattern indicators. Also, the impacts of river training works on fluvial processes are seldom dealt with. In this paper, the evolutionary processes of three sections in the Lower Yellow River, including Tiexie-Yiluo River mouth reach, Huayuankou-Heigangkou reach and Jiahetan-Gaocun reach, were analyzed for variations in the channel boundary line and the mainstream between 1960 and 2015. Channel pattern indicators such as sinuosity, mainstream wandering range and width/depth ratio were analyzed based on field measure- ments obtained by the Hydrological Department of the Yellow River Conservancy Commis- sion. The effects of river training works on the channel evolution are then described. Since 1960, numerous medium- and large-sized reservoirs have been built on the Yellow River, including Longyangxia Reservoir, Liujiaxia Reservoir and Xiaolangdi Reservoir. These res- ervoirs impound the runoff from upstream and retain the sediment, which changes the runoff and sediment conditions in the downstream reach. As a consequence, annual runoff and the frequency and peak of flooding have all decreased. As a result, the flow dynamics and their action on the river channel are also reduced, which changes the dynamic state of the river course. The discrimination results obtained using the single parameter discrimination rule and the discrimination equation show that the degree of wandering is weakened in the reaches studied. The variations in the channel pattern indicators show that the sinuosity in- creases and the wandering range decreases with a reduction in the total annual volume of water. However, the degree of wandering has little relationship to the sediment concentration. In addition, river training works play an important role in controlling the river course. Due to improvements in the river training works, the river course has become more stable under the same runoff and sediment conditions. A new discrimination rule that takes into account the impacts of the river training works is proposed. The discrimination results were found to fit well with the actual river pattern, which shows that the discrimination rule is applicable to the Lower Yellow River. The results show that the runoff and sediment conditions are the most important factors in the evolution of the river course. The river training works have at the same time limited the wandering range of the mainstream and played an important role in the fluvial processes. Both factors combined lead to the stabilization of the river.
基金supported by the National Natural Science Foundation of China(Grant No.51139001)
文摘Three stochastic mathematical models for calculation of the reservoir flood regulation process, river course flood release, and flood risk rate under flood control were established based on the theory of stochastic differential equations and features of flood control systems in the middle reach of the Huaihe River from Xixian to the Bengbu floodgate, comprehensively considering uncertain factors of hydrology, hydraulics, and engineering control. They were used to calculate the flood risk rate with flood regulation of five key reservoirs, including the Meishan, Xianghongdian, Nianyushan, Mozitan, and Foziling reservoirs in the middle reach of the Huaihe River under different flood frequencies, the flood risk rate with river course flood release under design and check floods for the trunk of the Huaihe River in conjunction with relevant flood storage areas, and the flood risk rate with operation of the Linhuaigang Project under design and check floods. The calculated results show that （l） the five reservoirs can withstand design floods, but the Xianghongdian and Foziling reservoirs will suffer overtopping accidents under check floods; （2） considering the service of flood storage areas under the design flood conditions of the Huaihe River, the mean flood risk rate with flood regulation of dykes and dams from Xixian to the Bengbu floodgate is about 0.2, and the trunk of the Huaihe River can generally withstand design floods; and （3） under a check flood with the flood return period of 1 000 years, the risk rate of overtopping accidents of the Linhuaigang Project is not larger than 0.15, indicating that it has a high flood regulation capacity. Through regulation and application of the flood control system of the Linhuigang Project, the Huaihe River Basin can withstand large floods, and the safety of the protected area can be ensured.
文摘The extensive economic development model in the past has caused a lot of damage to the environment, especially to rivers and lakes. Rivers and lakes are the source of the development of civilization. Today, people should pay special attention to the environmental management of rivers and lakes. With the rapid development of our society, the public has a profound understanding of the relationship between nature and human beings. Under this background, the concept of river repair and prevention is reflected, and the restoration and protection of river environment has been paid attention to by the public. This paper will point out the problems existing in the current river water environment ecological governance, lead to the governance principles, and on this basis, give the strategies to carry out the river water environment ecological governance.
文摘Water pollution control is very important to the whole city and the country. If we want to ensure the effect of river water pollution treatment, we need to understand the causes of water pollution first, and then according to the actual situation of targeted treatment, in order to improve the quality of water pollution treatment work.
文摘The Yellow River has always been known for"easily silting up,easily bursting its banks,and easily shifting course"and its course has indeed changed many times.It did not undergo any large-scale course changes during the pre-Qin period,but instead followed the course given in the"Hanzhi汉志(Treatises in the Book of Han)."The river recorded in the Yugong禹贡(Tribute of Yu)is actually the Hanzhi river,and the he(river)recorded in the Yugong that passed through the counties of Xunxian and Neihuang actually followed the former course of the Qi River.The Yellow River’s large-scale course changes began in the Han dynasty.After two thousand years of frequent changes,a 6-15 meters thick layer of sediment formed in the lower reaches of the Yellow River,completely altering the natural landscape of hills,rivers and lakes that had existed in the pre-Qin lower Yellow River,and finally shaping today’s landscape of an endless plain.The course changes brought about a rupture in the development of civilization in this area,with most cities and towns destroyed.The changes in the ecological and living environment around the lower Yellow River over thousands of years were apparently related to the flooding and course changes of the Yellow River,but in reality were caused by human over-exploitation of natural resources.
基金The International Exchange and Cooperation Project of Ministry of Agriculture“Conservation of Globally Important Agricultural Heritage Systems(GIAHS)in China in 2016”The Youth Talent Supporting Project of China Association for Science and Technology(2016010103)
文摘The Shandong Xiajin Yellow River Ancient Mulberry Trees System is a model of desertification control in the floor area in the Luxibei Plain,and of sustainable development.The current study about ancient mulberry trees in Xiajin county is mainly qualitative representation,lack of quantitative research.In addition,the relevant important ecological functional assessment should not only confine to quantitative assessment which illustrate the current condition,but also analyze the eco-service changes,derived from ecosystem structure develop,from the time dimension.Based on quantitative eco-service assessment of the ancient mulberry tree group,this paper intend to conduct a comprehensive analysis of ecological functions of ancient mulberry group focuses on the perspective of system structure and function evolution.Quantitative evaluation results show that the system has significant eco-efficiency in water conservation,reducing sediment loss,adjust atmosphere,etc.On timescale,thanks to mulberry cultivation,ecosystem structure and services have also undergone a corresponding change.In ecosystem structure：Planting pioneer trees such as mulberries and other species which can tolerate hostile site conditions,improves the micro-environment.This makes it possible for other crops to grow.The mixed forests and the combination of forestry and agriculture protect biodiversity.What＇s more,they make the structure of the ecosystems more robust,giving full play to their functions.In terms of ecosystem services：ecosystem services of Xiajin Yellow River Ancient Mulberry Trees have shown diversified development.And its main function has transferred from supply products to leisure and entertainment functions.
