Assessment of Sedimentation in Wlingi and Lodoyo Reservoirs: A Secondary Disaster Following the 2014 Eruption of Mt. Kelud, Indonesia

2017 ◽  
Vol 12 (3) ◽  
pp. 617-630 ◽  
Author(s):  
Fahmi Hidayat ◽  
◽  
Pitojo T. Juwono ◽  
Agus Suharyanto ◽  
Alwafi Pujiraharjo ◽  
...  
Keyword(s):  
Flood Control ◽  
Storage Capacity ◽  
Management Strategies ◽  
Sustainable Use ◽  
Disaster Mitigation ◽  
Field Surveys ◽  
Control Power ◽  
2014 Eruption ◽  
Sediment Disaster ◽  
Ongoing Evaluation

Wlingi and Lodoyo reservoirs in the Brantas River basin, Indonesia, provide numerous benefits including reliable irrigation water supply, flood control, power generation, fisheries and recreation. The function of both reservoirs particularly in relation to flood control has declined due to severe sedimentation that has reduced their storage capacities. The sedimentation in Wlingi and Lodoyo reservoirs is mainly caused by sediment inflow from the areas most affected by ejecta from eruptions of Mt. Kelud, one of the most active volcanoes in Indonesia. The main objective of this research is to assess the sedimentation problem in Wlingi and Lodoyo reservoirs, particularly as they are affected by eruptions of Mt Kelud. We performed reservoir bathymetric surveys and field surveys after the most recent eruption of Mt. Kelud in February 2014 and compared the results with surveys undertaken before the eruption. The assessment revealed that both reservoirs were severely affected by the 2014 eruption. The effective storage capacity of Wlingi reservoir in March 2013 was 2.01 Mm3and the survey in May 2015 indicated that the effective storage of Wlingi reservoir had decreased to 1.01 Mm3. Similarly, the effective storage capacity of Lodoyo reservoir in March 2013 was 2.72 Mm3, reduced to 1.33 Mm3in May 2015. These findings underpin the analysis of the impacts of the secondary disaster due to reservoir sedimentation following the volcanic eruption and the implications for mitigating and managing the risks for sustainable use of reservoirs to control floods, supply water, generate electricity, etc. To cope with the extreme sedimentation problem in Wlingi and Lodoyo reservoirs, diverse sediment management strategies have been applied in these reservoirs and their catchments. However sediment disaster management strategies for both reservoirs, an integral part of the Mt. Kelud Volcanic Disaster Mitigation Plan, require continuous maintenance and recurrent operations, and ongoing evaluation and improvement.

scholarly journals Farmers’ and Herders’ Perceptions on Rangeland Management in Two Agroecological Zones of Benin

Land ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 425
Author(s):  
Rodrigue Vivien Cao Diogo ◽  
Luc Hippolyte Dossa ◽  
Sèyi Fridaïus Ulrich Vanvanhossou ◽  
Badirou Dine Abdoulaye ◽  
Kossi Hélliot Dosseh ◽  
...  
Keyword(s):  
Natural Resources ◽  
Management Strategies ◽  
Sustainable Use ◽  
Negative Attitude ◽  
Rangeland Management ◽  
Mineral Fertilization ◽  
The North ◽  
Unused Land ◽  
Agroecological Zones ◽  
Sound Management

The sustainable use of rangelands in pastoral areas requires the inclusion of all stakeholders to develop sound management strategies. However, the role of these actors in the sustainable management of natural resources is still poorly understood. The present study aims to (i) assess the perception of farmers and herders of the risks and opportunities of transhumance on rangeland resource use and management, and to (ii) generate useful knowledge for the design and implementation of policies that favor the coexistence of these actors and reduce competition over rangeland resources use in Benin. To this end, interviews were conducted with 240 crop farmers and herders using a semi-structured questionnaire in two contrasting agroecological zones in the northern (Kandi) and the southern (Kétou) part of the country. Among the respondents, 64% of farmers in the North were agro-pastoralists (owning 10.6 ha of land and 10.7 cattle) and 36% were herders (keeping 45.8 cattle and cultivating about 3.7 ha of land). They perceived that communal rangelands were entirely degraded. In the South, 36% of respondents were agro-pastoralists (with 0.3 cattle and farming 4 ha of land) and 64% cattle herders (raising 45.3 cattle and farming 0.9 ha of land only). Of the herders, 50% kept cattle for more than 20 years, while agro-pastoralists had no previous experience in cattle herding. Cultivation practices among crop farmers, such as high use of mineral fertilization (23.8%) and bush fires for land clearing (22.5%), were reported in Kandi (North) and Kétou (South) as factors that might contribute to land degradation. However, these farmers perceived transhumance as a threat to the sustainable use of natural resources. In contrast, herders perceived transhumance as an opportunity to valorize unused land and increase the availability of manure to cropland. The prevalent negative attitude of crop farmers regarding transhumant herders increases the vulnerability of cattle herding in both regions. There is an urgent need of raising awareness concerning the mutual benefits provided by the coexistence of crop farmers with herders to promote participative rangeland management strategies. This may contribute towards coping with the current challenges of food insecurity and increasing climate variability as well as to reducing recurrent conflicts in the region.

scholarly journals Diversity of plant knowledge in a "Caiçara" community from the Brazilian Atlantic Forest coast

2012 ◽  
Vol 26 (4) ◽  
pp. 735-747 ◽  
Author(s):  
Mariana Reis de Brito ◽  
Luci de Senna-Valle
Keyword(s):  
Management Strategies ◽  
Sustainable Use ◽  
Wiener Index ◽  
Natural Ecosystems ◽  
Plant Resources ◽  
Traditional Management ◽  
Heterogeneous Distribution ◽  
Plant Knowledge ◽  
Chi Squared ◽  
Number Of Publications

The number of publications about the Caiçaras population is growing, which shows that researchers are interested in these natives. This study aimed to survey the flora used by local specialists of the Praia do Sono Caiçara community, and recorded how these taxa were used, with the goal of understanding traditional management systems that help to conserve natural ecosystems. Twelve informants were selected and interviewed. The applied grouping analysis, together with the chi-squared test, underlined that the analysed ethnobotanical knowledge showed a heterogeneous distribution in relation to the gender of the interviewee. A total of 190 taxa were cited and were classified into nine usage categories. The Shannon-Wiener index (H') value obtained in this study was the second highest in comparison to other Brazilian coastal communities. This work showed that the local specialists of this Caiçara community maintain a wide knowledge of, and affinity to, the plant resources that surround them. This knowledge is not only important, but fundamental to discussions about the application of sustainable use and management strategies for this area of conservation value.

scholarly journals Evaluation Of Sediment Management Strategies For Large Reservoirs

2021 ◽  
Author(s):  
Muhammad Usman Rashid ◽  
Haris Miqdad ◽  
Muhammad Saad ul Hassan ◽  
Abdul Haseeb
Keyword(s):  
Flood Control ◽  
Net Present Value ◽  
Management Strategies ◽  
Vital Role ◽  
Cost Ratio ◽  
Benefit Cost Ratio ◽  
Sediment Flushing ◽  
Under Construction ◽  
Benefit Cost ◽  
Tarbela Reservoir

Abstract Multipurpose large dams play a key role in the development of world by providing water for irrigation, flood control and hydropower. Tarbela is one of the world's largest earth and rock fill dam. Being multipurpose dam, it provides vital role for economic stability and social development of Pakistan. Tarbela Reservoir has lost its significant capacity due to sediment deposition. The objective of the study was to evaluate different options for evacuation of deposited sediments and reducing sediment inflows to Tarbela Reservoir through sediment modeling by HEC-RAS. Sediment flushing from existing power tunnels was evaluated in first option and found not feasible due to the downstream constraints and loss of 7848 MW hydropower from Tarbela and Ghazi Barotha. New sediment bypass tunnels were proposed on right bank of the dam to overcome the constraints in second option. Sediment modeling was performed by HEC-RAS to evaluate each scenario of sediment flushing with different parameters. The sediment balance ratio and long term capacity ratio was also checked for each scenario for technical evaluation and also economic analysis was performed. Most technical viable scenario was flushing for 90 days at reservoir drawdown level of 390 m with discharge of 5000m 3 /s. However, this scenario was not economically feasible as net present value was negative, internal rate of return was 3-4 %, and benefit cost ratio was found less than one. The 3 rd option, with under construction multipurpose Diamer Basha Dam on upstream of Tarbela Reservoir, was also evaluated on HEC-RAS. Results depicted that large amount of sediments were trapped in the upstream reservoir which ultimately reduced significantly the inflow of sediments and delta movement in Tarbela Reservoir. This option is recommended because it will enhance the life of Tarbela Reservoir and it will keep on providing multiple benefits for longer time.

scholarly journals COASTAL GEOMORPHOSITES ASSESSMENT FOR ECOTOURISM DEVELOPMENT IN EAST LOMBOK, INDONESIA

2021 ◽  
Vol 36 (2spl) ◽  
pp. 589-596
Author(s):  
Danang Sri HADMOKO ◽  
◽  
Muh Aris MARFAI ◽  
Mukhamad Ngainul MALAWANI ◽  
Bachtiar Wahyu MUTAQIN ◽  
...  
Keyword(s):  
Regional Planning ◽  
Management Strategies ◽  
Strong Connection ◽  
Field Surveys ◽  
Conservation Values

The research set out to analyze coastal typology characteristics and ecotourism development through geomorphosite assessments and suggest fitting management strategies in East Lombok, Indonesia. In this research, the connection between ecotourism potentials and coastal typologies was investigated. The methods of this research were conducted using a combination of GIS-based analysis and field surveys. Geomorphosites were assessed from several facets or attributes: scientific and intrinsic, educational, economic, conservation, and added values. The analysis results showed that two coastal geomorphosites could be developed into ecotourism spots, as supported by East Lombok’s regional planning to promote ecotourism in its tourism branding. In addition, the sites are suggested to develop local products as a part of their attractiveness. Another finding is that the coastal typology has a strong connection to the scoring result, especially the scientific-intrinsic and conservation values.

scholarly journals Exposure of Protected and Unprotected Forest to Plant Invasions in the Eastern United States

Forests ◽  
2018 ◽  
Vol 9 (11) ◽  
pp. 723 ◽  
Author(s):  
Kurt Riitters ◽  
Kevin Potter ◽  
Basil Iannone ◽  
Christopher Oswalt ◽  
Qinfeng Guo ◽  
...  
Keyword(s):  
United States ◽  
Invasive Plants ◽  
Management Strategies ◽  
Scale Up ◽  
Sustainable Use ◽  
Plant Invasions ◽  
Forest Area ◽  
Forest Site ◽  
Eastern United States ◽  
Forest Protection

Research Highlights: We demonstrate a macroscale framework combining an invasibility model with forest inventory data, and evaluate regional forest exposure to harmful invasive plants under different types of forest protection. Background and Objectives: Protected areas are a fundamental component of natural resource conservation. The exposure of protected forests to invasive plants can impede achievement of conservation goals, and the effectiveness of protection for limiting forest invasions is uncertain. We conducted a macroscale assessment of the exposure of protected and unprotected forests to harmful invasive plants in the eastern United States. Materials and Methods: Invasibility (the probability that a forest site has been invaded) was estimated for 82,506 inventory plots from site and landscape attributes. The invaded forest area was estimated by using the inventory sample design to scale up plot invasibility estimates to all forest area. We compared the invasibility and the invaded forest area of seven categories of protection with that of de facto protected (publicly owned) forest and unprotected forest in 13 ecological provinces. Results: We estimate approximately 51% of the total forest area has been exposed to harmful invasive plants, including 30% of the protected forest, 38% of the de facto protected forest, and 56% of the unprotected forest. Based on cumulative invasibility, the relative exposure of protection categories depended on the assumed invasibility threshold. Based on the invaded forest area, the five least-exposed protection categories were wilderness area (13% invaded), national park (18%), sustainable use (26%), nature reserve (31%), and de facto protected Federal land (36%). Of the total uninvaded forest area, only 15% was protected and 14% had de facto protection. Conclusions: Any protection is better than none, and public ownership alone is as effective as some types of formal protection. Since most of the remaining uninvaded forest area is unprotected, landscape-level management strategies will provide the most opportunities to conserve it.

scholarly journals Research on the Multi-Objective Cooperative Competition Mechanism of Jinsha River Downstream Cascade Reservoirs during the Flood Season Based on Optimized NSGA-III

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 849 ◽  
Author(s):  
Xiaokuan Ni ◽  
Zengchuan Dong ◽  
Wei Xie ◽  
Wenhao Jia ◽  
Changgui Duan ◽  
...  
Keyword(s):  
Power Generation ◽  
Flood Control ◽  
Reference Points ◽  
Jinsha River ◽  
Flood Prevention ◽  
Cascade Reservoirs ◽  
Control Power ◽  
Flood Season ◽  
Competitive Relationship ◽  
Cooperative Competition

This paper analyzes the complex relationship among flood control, power generation and ecological maintenance for the four cascade reservoirs located on the lower reaches of the Jinsha River, China. A weighted flood control index is incorporated and a constraining method consisting of the combination of a constrained corridor and a penalty function is proposed. A comprehensive utilization model is established in this paper based on the objectives of flood prevention, power generation, and ecological maintenance of the downstream cascade reservoir group of the Jinsha River during flood season. In addition, based on the coalescent selection of reference points and vector angles, an optimized non-dominated sorting genetic algorithm (VA-NSGA-III) is proposed. The algorithm is applied to the constructed model to define the cooperative competition mechanisms among these three targets, resulting in a set of non-inferior scheduling schemes with more uniformity and better convergence acquired with VA-NSGA-III. The scheduling program shows that there is a non-linear competitive relationship between the power generation and ecological effects of the cascade reservoirs during flood season, and the competitiveness weakens as the power generation increases. Furthermore, when the flood control is at low risk, there exists a complex coupling relationship between competition and coordination of the flood control, power generation, and ecological maintenance. While the risk appears high, there is a competitive relationship between flood control and power generation, with flood control being in synergy with ecological maintenance.

A Suitable Method of Energy Storage Capacity Optimization Based on DFT for BIPV

2014 ◽  
Vol 548-549 ◽  
pp. 901-909
Author(s):  
Bin Li ◽  
Shu Chen ◽  
Shui Ying Liang
Keyword(s):  
Energy Storage ◽  
Storage Capacity ◽  
Storage System ◽  
Energy Storage System ◽  
Building Energy ◽  
Building Energy Efficiency ◽  
Control Power ◽  
Energy Storage Capacity ◽  
Power Fluctuations ◽  
Small Capacity

Building Integrated with Photovotaic (BIPV) will become an effective way of building energy efficiency. A capacity determination method of energy storage system based on spectral analysis for BIPV was presented. To take both the isolated operation and grid-connected operation into account, the energy storage capacity can be determined based on spectrum analysis results of the control power to smooth power fluctuations in microgrid. Results indicate that the power control target of tie-line in microgrid can be achieved and the power fluctuations of BIPV output power and load power can be effectively smoothed by a relatively small capacity of energy storage system determined by the presented method.

Research on Sediment Problem in Dam Area of Three Gorges Project

2014 ◽  
Vol 638-640 ◽  
pp. 770-773
Author(s):  
Jun Wang ◽  
Wei Guo ◽  
Hai Tao Xu
Keyword(s):  
Flood Control ◽  
Early Stage ◽  
Three Gorges Project ◽  
Three Gorges ◽  
Sedimentation Pattern ◽  
Control Power ◽  
The Three Gorges ◽  
The Three Gorges Project ◽  
Prototype Observation ◽  
Narrow Section

The Three Gorges Project is the biggest hydraulic engineering and it brings great comprehensive benefits such as flood control, power generation, navigation, and water supply. According to the sedimentation prototype observation on the early stage of the Three Gorges Project operation, the sedimentation pattern of dam area and the upper part of power plant, as well as the channel sedimentation are analyzed after the systematic arrangement of the prototype observation, at the same time, the formation mechanism and development of siltation are studied based on river dynamics theory. The analysis shows that: the early siltation does not have important influence on the operation of the Three Gorges Project, the sedimentation of dam area occurs mainly in the wide section while little siltation in the narrow section and the siltation intensity is greater while the location is close to the dam from the view of the siltation distribution.

scholarly journals The Impact of Information on Attitudes toward Sustainable Wildlife Utilization and Management: A Survey of the Chinese Public

Animals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2640
Author(s):  
Zhifan Song ◽  
Qiang Wang ◽  
Zhen Miao ◽  
Kirsten Conrad ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Wildlife Conservation ◽  
Public Attitudes ◽  
Management Strategies ◽  
Sustainable Use ◽  
Effective Rate ◽  
Conservation Education ◽  
Related Information ◽  
Geographical Regions ◽  
Wildlife Utilization ◽  
The Impact

The widespread dissemination of information related to wildlife utilization in new online media and traditional media undoubtedly impacts societal conservation concepts and attitudes, thus triggering public discussions on the relationship between conservation and utilization. A study on how public attitudes and concepts are affected by the related information on wildlife utilization is helpful to implement the scientific wildlife conservation and management strategies, and to propose targeted measures to optimize the information environment. We designed the questionnaire to investigate the public’s awareness and agreement with related information on wildlife utilization so as to measure how information with different dissemination channels, source types, and content orientation influenced the public’s concept of wildlife conservation and utilization. The questionnaire was distributed in seven major geographical regions throughout China. Out of a total of 1645 questionnaires that were collected, 1294 questionnaires were valid, with an effective rate of 78.7%. Results show that respondents had the greatest awareness of information on preventing unsustainable and illegal utilization, and the lowest awareness of information on promoting unsustainable utilization, and that awareness of information that against utilization was higher than that of information which supported sustainable utilization. At the same time, respondents showed the greatest agreement for information on preventing unsustainable utilization and the lowest agreement for information on promoting unsustainable utilization; also, their agreement with information that against utilization was higher than that for information which supported sustainable use. Respondents had a high level of awareness of information on wildlife related to COVID-19 provided by experts. Gender, age, the level of development of the city in which they live, education, vegetarianism, and religious beliefs all affected respondents’ agreement with related information on wildlife utilization. This research suggests that the publicity and education of scientific conservation methods should be emphasized in the future conservation education. In addition, scholars in the field of wildlife research should assume the role of ‘influencer’ and give full play to the scientific guidance of public opinion.

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