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Combining the advantages of dual-ion batteries (DIBs) and sodium-ion batteries (SIBs), we herein develop a superior sodium-based dual-ion battery (Na-DIB) based on the PTCDA organic anode and ionic liquid (IL) electrolyte. The system shows the highest specific discharge capacity of 177 mAh g-1 at 0.5C and excellent capacity retention over 100% at 2C after 200 cycles. Notably, even at an ultrahigh rate of 20C, the battery still maintains a considerable capacity of 60 mAh g-1 with a coulombic efficiency (CE) close to 100 and 94% capacity retention after 1000 cycles. Moreover, the self-discharge of the system has been investigated and shown to have an extremely low value of 0.18% h-1. Consequently, this work presents an excellent Na-DIB system, which could be a promising candidate for large-scale applications.

Development of practical rechargeable Mg batteries (RMBs) is impeded by their limited cycle life and rate performance of cathodes. As demonstrated herein, a copper‐porphyrin with meso‐functionalized ethynyl groups is capable of reversible two‐ and four‐electron storage at an extremely fast rate (tested up to 53 C). The reversible four‐electron redox process with cationic‐anionic contributions resulted in a specific discharge capacity of 155 mAh g−1 at the high current density of 1000 mA g−1. Even at 4000 mA g−1, it still delivered >70 mAh g−1 after 500 cycles, corresponding to an energy density of >92 Wh kg−1 at a high power of >5100 W kg−1. The ability to provide such high‐rate performance and long‐life opens the way to the development of practical cathodes for multivalent metal batteries., Self‐conditioning: The metalloporphyrin based electrodes exhibit reversible insertion/deinsertion of Mg2+ and bulky anions as well as excellent capacity retention over several hundred cycles at very fast charge‐discharge rates. This opens the pathway for development of new organic electrode materials for stable high‐energy and high‐power multivalent metal‐based energy storage systems.

The possibility of increasing the stability of the surface properties of polyethylene films treated in a high-frequency gas discharge plasma has been explored. It has been shown that, to weaken the effect of reversibility of surface properties, the plasma-treatment mode should meet two conditions: (1) the treatment time should not exceed the duration of the stage of formation of oxygen-containing groups in the surface layer of the polymer and (2) the temperature of the polymer during the treatment should be 70°C. The dependence of the specific discharge power on the polyethylene film thickness corresponding to the above conditions has been determined by calculation.

The recycling and reuse of Ni, Co, and other rare metals from aged lithium-ion batteries have drawn much attention to the researchers, which can reduce the negative effect on the environment. In this work, a novel and facile regeneration method is proposed to obtain valuable metals Ni, Co, and Mn. The fresh LiNi0.6Co0.2Mn0.2O2 cathode materials are regenerated via employing mixed acid leaching, oxalate co-precipitation, and solid-phase reaction. The regenerated LiNi0.6Co0.2Mn0.2O2 cathode materials display an initial specific discharge capacity of 180.6 mAh g−1 at 0.1 C. The capacity retention is 86% after 100 cycles at the current density of 1 C. The recycling process in our work does not need complicated metal separation and has low processing costs. Moreover, the regenerated cathode materials can be reused in next-generation LIBs.

Sodium-ion batteries (SIBs) are generally auspicious solutions for large-scale electrochemical energy storage devices by reason of broad distribution of sodium (Na) sources and economically viable. In this article, layered O3-type Na0.9Mn0.55Ni0.35Cu0.1O2 cathode material was prepared by using conventional solid state reaction for SIBs. This material displayed high specific discharge capacity of 168.22 mAh g−1 at of 0.1C rate, among 2 and 4 V and exhibited good coulombic efficiency. The copper (Cu) swap enriched the electrochemical performances of the obtained O3-type cathodes by maintaining the structural stability.

The global renewable energy potential estimates vary hundredfold, while the estimates for global hydropower vary fourfold. Thus, an accurate method of assessing the small hydropower (SHP) potential at regional and (sub)-national scales is required. This study aims to present and verify a robust method for sizing and siting the SHP potential by utilizing the capabilities of GIS. The proposed virtual hydropower assessment (VHA) method identifies suitable locations for hydropower production based on digital elevation and specific discharge maps. VHA was conducted for Estonia, a low-lying country in Europe. Twenty operational or abandoned SHP in thirteen rivers were used for verification. There is a good overall agreement between the computed virtual and installed capacities. The VHA method provided a realistic output for SHP location siting and revealed some unexploited opportunities to install micro and mini-hydro schemes in all of the analyzed rivers. Further research is required with a larger verification data sample for the VHA method to investigate the effects of the digital elevation model resolution, river segment length, and hydrological components. The outcomes of this study provide a reliable and robust method of assessing the SHP potential worldwide, particularly in countries where meteorological and hydrological data are scarce.

A simple method was applied to control the morphology of LiMn2O4 and Li1.05Mn1.97Nb0.03O4 in the sintering process by premixing a suitable proportion of acetylene black in the raw material. Both specific discharge capacity and cycling stability of the samples were improved. The results demonstrated that the doped samples showed excellent electrochemical performance at both 25 °C and 55 °C.

A series of LiFe1−xMnxPO4/C composites were successfully synthesized through a simple hydrothermal method. The effects of doped Mn on their micro-structures and electrochemical performances were investigated. The XRD results indicate that Mn doping cannot change the olivine lattice type of LiFePO4. Appropriate Mn doping can reduce the particle size of LiFePO4. The electrochemical performance data show that the electrochemical performances of the composite materials are enhanced at first and then decrease as the doping amount of Mn increases. Both the CV and EIS results illustrate that a small amount of doped Mn will reduce the electrode polarization and electrochemical impedance of the samples and simultaneously improve the electrochemical performance. Among all the samples, the LiFe0.98Mn0.02PO4/C sample has a desirable electrochemical performance, with its specific discharge capacity reaching 156.0 mAh g−1 at a rate of 0.1 C. Even at a high rate of 5 C, it can still reach 110.0 mAh g−1. All the results indicate that an appropriate amount of doped Mn has an emphatic effect on the electrochemical performance of LiFePO4/C.

Objective: To evaluate the status quo and influencing factors of readiness for hospital discharge of patients undergoing hysteromyomectomy. Methods: A total of 240 patients with uterine fibroid undergoing hysteromyomectomy from 2 hospitals in Jingzhou were investigated using a self-designed general information questionnaire, the Readiness for Hospital Discharge Scale and the Quality of Discharge Teaching Scale. Results: The total score of readiness for hospital discharge was (91.36 ± 18.46), the multiple linear regression analysis showed that the quality of discharge guidance, the scope of myomectomy, pain degree of incision and the average monthly income per family were the main influencing factors of readiness for hospital discharge. Conclusion: The readiness for hospital discharge was at a medium level in patients with uterine fibroid undergoing hysteromyomectomy, medical personnel should give specific discharge guidance according to the specific conditions of patients to ensure the safety of patients after discharge.

P187 Figure 1Showing the post Tocilizumab alert card[Figure omitted. See PDF]ConclusionAppropriate treatment protocol and regular monitoring are needed for patients who receive Tocilizumab in severe SARS-CoV-2 illness. Clinicians should bear in mind the high incidence of treatment-related adverse events and the lack of data about long term effects. Treatment alert cards and specific discharge advice may be beneficial.

1354 Table 1 2019 2020 % Children’s Social Care (CSC) involvement documented at triage 41% 55% % acute safeguarding concerns discussed in real time with CSC when necessary 17% 56% % of appropriate CSC referral/notification completed by ED team 74% 88% % referral to violent crime reduction services made if appropriate 67% 59% % school/college documented 42% 48% % HEADSSS assessment documented 10% 19% ConclusionsOur results show that three times as many children were discussed in 2020, when paediatric ED led YP’s care, and we saw improvements in all areas audited.We presented our results to ED staff to highlight areas for improvement, and we are collecting feedback from the wider MDT to identify why safeguarding concerns are dealt with differently and what barriers staff are facing.We are further investigating the discrepancy in numbers of YP discussed in safeguarding meetings between 2019 and 2020 by auditing specific discharge diagnoses that require safeguarding involvement (e.g. assault). This will allow us to identify whether lower numbers in 2019 were due to YP not being referred to the safeguarding meeting, or fewer patients presenting to the department.Our results are helping to shape new ED pathways that increase involvement of paediatric staff with greater safeguarding experience in the care of YP, to ensure they are appropriately supported and protected.

Study Region: Kamchatka Peninsula, Russian Federation. Study Focus: The strength of an overturning process of North Pacific sea water originating in the Sea of Okhotsk is determined by the sea water salinity in the area. Recent observations show that the overturning process is important to the entire North Pacific and is statistically related to the precipitation over the Kamchatka Peninsula (KP). This study uses estimations based on specific discharge and the Soil and Water Assessment Tool (SWAT) to verify and further explore the connection between the terrestrial freshwater discharge from KP and the overturning process. New Hydrological Insights for the Region: Previously inaccessible observed discharge data from 11 major rivers on the KP were obtained and analyzed for the first time. Based on the data we estimate annual discharge from the entire KP using the specific discharge and regression analysis, and we then simulate monthly discharge from the western KP using the SWAT model. Our result shows a significant negative correlation (r2 = 0.36, p < 0.01) between the interannual variation of sea water salinity in the overturning process area, and the variation of annual freshwater discharge from the western KP, therefore successfully verifies that freshwater discharge from the western KP is a critical factor that affects the strength of the overturning process.

The transport of cationic amine-modified latex (AML) and anionic carboxylate-modified latex (CML) microspheres through a discrete sandstone fracture with mineralogical heterogeneity and roughness was studied. Two microsphere sizes (200 nm and 1000 nm), two ionic strengths (5 mM and 10 mM), and two specific discharges (0.35 mm.s-1 and 0.70 mm.s-1) were tested to observe the impact on transport under favorable and unfavorable conditions. The difference in retention between AML (net favorable) and CML (net unfavorable) microsphere attachment was 25% for the 200 nm microspheres and 13% for the 1000 nm microspheres. Less than 50% of the AML microspheres were retained in the fracture, postulated to be due to the effects of mineralogical heterogeneity and fracture surface roughness . The effect of an increase in ionic strength in increasing retention was significant for unfavorable attachment, but was not significant for favorable attachment conditions. The effect of specific discharge was minor for all but the 200 nm CML microspheres at 10 mM ionic strength. When flushing the fracture first with cationic microspheres, then with anionic microspheres, the recovery of anionic microspheres resembled favorable attachment presumably due to interaction with cationic microspheres that remained attached to the sandstone surface. Colloid breakthrough curves could be fit well with a two site attachment model, with reversible and irreversible sites.

The substitution of elements has attracted great interest to enhance the electrochemical properties of sodium-ion batteries (SIBs). Herein, the P2–Na0.67Co0.35Ti0.20Mn0.45–xLaxO2 electrode samples were prepared via a solid-state route. The effect of La3+ substitution was researched as high-rate SIBs cathode. The Na0.67Co0.35Ti0.20Mn0.44La0.01O2 exhibits a superior initial specific capacity of 162.7 and 125.9 mA·h/g after 50 cycles at 0.1C rate, and the initial specific discharge capacity of 115.2 mA·h/g with 60.6% capacity retention after 100 cycles at 1C. In addition, the Na0.67Co0.35Ti0.20Mn0.44La0.01O2 sample shows an excellent rate capacity of 91.9 and 60.4 mA·h/g with 46.9% and 50.9% capacity retentions even at 8C and 10C rate after 100 cycles, respectively. The promising La-substituted P2-type Na0.67Co0.35Ti0.20Mn0.45–xLaxO2 material provides a new strategy for designing high-rate performance of SIBs.

Ice sheets have been shown to deliver large amounts of labile iron (Fe) to aquatic ecosystems; however, the role of glaciers distinct from ice sheets in supplying labile Fe to downstream ecosystems is less well understood despite their rapid volume loss globally. Direct and continuous measurements of Fe from glaciers throughout an entire melt season are very limited to date. Here we present extensive seasonal data on 0.45-μm-filtered Fe (dFe) from three glaciers in Asia. Concentrations of dFe are negatively correlated with glacier discharge, and dFe yields are closely related to specific discharge. Based on our study and previously published dFe data, we estimate the release of dFe from Asian glaciers to be 23.8±14.1 Gg/a. We further compile a global data set of dFe from more than 12 glaciers, which, when combined with data on glacier discharge, suggest that the release of dFe from glaciers globally is on the order of 185±172 Gg/a. This finding suggests that glaciers may provide a substantial, but largely unrecognized source of potentially labile Fe, and may become increasingly important for the Fe biogeochemical cycle in a warming climate.

The relationship between peak specific discharge and watershed area is examined for large, rare and extreme floods in Malaysia using a distributed hydrological model. Envelope curves for specific discharge for these events and the uncertainty is quantified. The relationships between rainfall duration and intensity as a function of watershed size were also examined. As a result, three main regions were defined to estimate the peak discharge as a function of watershed size for large, extreme and rare floods. The average magnitudes for the PMP and the world’s extreme rainfall events were 5 and 12 times larger than the 100-year event, respectively. The envelope curves may assist engineers and other interested parties to estimate the peak discharge for watershed up to 100,000 km2, especially for ungauged watersheds.

This paper is aimed at investigating and improving material removal rate (MRR) and surface quality in wire electrical discharge machining (WEDM) based on specific discharge energy and magnetic-assisted method. A set of a single-factor experiment is implemented to analyze the effects of carbon content and discharge parameters on machining characteristics. The concept of specific discharge energy (SDE) is proposed to reveal the fundamental influence of workpiece material properties on material removal rate and to obtain the optimal machining feed rate. The mathematical model between SDE and the physical properties of workpiece material is also fitted out. Additionally, it can be found that, in subsurface material, the recast layer is with the maximal hardness followed by bulk material and heat-affected zone. Ra and RLT firstly increase and then decrease with the increase of carbon content, and they have a positive correlation with discharge peak current and pulse-on time. Finally, verified experiment shows that, comparing with other machining feed rates, the method of optimal machining feed rate according to SDE can simultaneously achieve the fastest actual machining speed and the lowest surface roughness. In addition, the method of magnetic-assisted trim cutting can almost eliminate recast layer and reduce heat-affected zone to less than 20 μm.

In this work, V2O5 hollow spheres synthesized via a solvothermal method for high performance cathode of aqueous rechargeable zinc ion batteries (ARZIBs) is reported. The as-prepared V2O5 sample comprises of hollow spheres particles with diameter of 0.7–1.6 μm, which shows a larger specific area than commercial V2O5. When served as cathode of ARZIBs, V2O5 hollow spheres deliver better cycle stability and more excellent rate performance than commercial V2O5. More specifically, V2O5 hollow spheres display a high specific discharge capacity of 132 mA h g−1 with capacity retention of 82.5% after 6200 cycles at the current density of 10 A g−1. And the discharge capacity of V2O5 hollow spheres electrode can reach to 280, 250, 225, 213, 204, 165, 147 and 108 mA h g−1 at current densities of 0.2, 0.3, 0.5, 0.8, 1, 3, 5 and 10 A g−1, respectively. Further, the Zn V2O5 batteries with V2O5 hollow spheres cathode reveal a promising potential for practical application.

Background Hospitalized infants often need fortified human milk and formulas for growth in the neonatal intensive care unit and postdischarge. Parents must learn how to properly mix infant feedings.At the initial Children's Hospital Colorado follow-up visit, baseline data revealed a 50% rate of mixing inaccuracy of discharge feeding recipes and identified the readmission of 2 infants with life-threatening hypernatremia. A gap in discharge teaching was identified. A quality improvement project was implemented at 2 affiliated neonatal intensive care units. Purpose/aim The aim of this study was to improve parental comfort and efficacy in infant feeding preparation during hospitalization, reduce mixing inaccuracy postdischarge, and prevent readmission. The primary aim was to improve the accuracy rate at follow-up to 75% within 12 months and the sustain mixing accuracy rate at follow-up to above 95% for an additional 24 months. Methods/interventions A literature review was conducted; potential barriers were identified and strategies developed to recognize the relationships between the aim and the changes to be tested. Implementation of standardized teaching focused on the teach-back technique. Education included mixing demonstration and written instructions. Parents were expected to correctly mix the recipe 3 times before discharge. Results Mixing accuracy at the initial clinic follow-up visit improved to 97%. No readmissions were reported from inaccurately prepared feedings. Implications for practice Collaborative quality improvement project with standardized teaching provided improved feeding safety and parental comfort with accuracy of discharge instructions. Primary care providers need to be aware of the importance of accurate formula or fortified human milk preparation and verify accuracy of the specific discharge recipes at the initial visit.

An approach is presented to determine groundwater flow in unconsolidated aquifers with a heat pulse response test using a heating cable and a fiber-optic cable. The cables are installed together using direct push so that the cables are in direct contact with the aquifer. The temperature response is measured for multiple days along the fiber-optic cable with Distributed Temperature Sensing (DTS). The new approach fits a two-dimensional analytical solution to the temperature measurements, so that the specific discharge can be estimated without knowledge of the position of the fiber-optic cable relative to the heating cable. Two case studies are presented. The first case study is at a managed aquifer recharge system where fiber-optic cables are inserted 15 m deep at various locations to test the fitting procedure. Similar and relatively large specific discharges are found at the different locations with little vertical variation (0.4–0.6 m/day). The second case study is at a polder, where the water level is maintained 2 m below the surrounding lakes, resulting in significant groundwater flow. The heating and fiber-optic cables are inserted to a depth of 45 m. The specific discharge varies 0.07–0.1 m/day and is significantly larger in a thin layer at 30-m depth. It is shown with numerical experiments that the estimated specific discharge is smoother than in reality due to vertical conduction, but the peak specific discharge is estimated correctly for layers thicker than ∼1.5 m.

Requalification of low-head ramped weirs through the addition of substrates (retrofitting) has attracted attention in recent years. However, few studies are available on how this measure affects the negotiation of ramped weirs by fish. This study aimed to assess the performance of an experimental ramped weir (3.00 m long with 10% slope, 0.30 m head-drop) to enhance the passage of a potamodromous cyprinid species, the Iberian barbel (Luciobarbus bocagei). Attention was given to testing the effects of the addition of a substrate, in this case cobbles, to the ramp (Nature) vs. a smooth bottom (Control), and discharge (Q, 55 L·s−1 and 110 L·s−1 (or specific discharge per unit width, q = 92 L·s−1·m−1 and 183 L·s−1·m−1)) on fish passage performance. Fish physiological responses to stress and fatigue, measured by glucose and lactate concentrations in blood samples, were also analysed. Results showed that the Nature design generally increased fish movements and successful upstream passages, and enhanced fish passage performance by enabling faster negotiations. Fish movements were also affected by increasing discharge, registering reductions with 110 L·s−1. Results of the physiological parameters indicate that both glucose and lactate concentrations were also influenced by discharge. The outcomes from this study present important information about fish passage performance across low-head ramped weirs and could provide data needed to help biologists and engineers to develop more effective structures to alleviate small instream obstacles.

In this paper the results are presented of estimation of T-year specific discharge of several streams in two regions in Slovakia. The Qmax time series used in the study were observed at water gauges from lowland Slovak part of the Morava River basin, and from the mountainous Belá River basin. For estimating the design values, we have studied the use of only one type of probability distribution, namely the Log-Pearson Type III Distribution (LP3 distribution). The use of only one type of distribution brings several benefits, e.g. possibility of the regionalization of the distribution parameters (in this study skew coefficient). In the first step the design values of the specific discharge series qmax (with historical data) were estimated and regional skew coefficients Gr of the LP3 distribution were computed. Regional skewness coefficient Gr was estimated to be 0.38 in the Morava River region, and 0.73 in the Belá River region. In many cases the estimate of the 1000-year specific discharge is two times higher than the value of the 100-year specific discharge. Then we have derived the empirical relations between station skew coefficient G and the elevation of the water gauge. In the second step we have derived the empirical relationships between 1000-years specific discharge q1000 and the elevation of the water gauge for both regions separately. The derived empirical regional equations can be used to estimate the 1000-years specific discharge of other streams in the region.

Based on experiments conducted in stepped spillways, both the flow depths at the inception point of air entrainment and for uniform mixture flow can be developed. These expressions allow to determine the so-called drawdown length and backwater length for the black water and white water portions of stepped spillway flow, respectively. The results indicate a significant effect of specific discharge and spillway slope on all quantities involved in stepped spillway flow.

This work introduces a new unstructured gridding approach relying on feedback from a previous groundwater flow model. All cells in a relatively coarse model using a rectilinear grid are recursively subdivided following a cell wise specific discharge-based indicator to generate quadtree, octree or Voronoi grids. This technique leverages the full potential of the latest MODFLOW engines. The suitability of this approach is demonstrated on challenging single and multilayered heterogeneous formations. The proposed method is straightforward to implement in existing software packages. It supports iterative updating of groundwater flow models from the legacy rectilinear to unstructured grids.

This study periodically rests Li-O2 batteries (for 5–10 min) between each 2–10 min discharge to improve the oxygen transfer within the porous electrode. Periodically resting the battery increases the specific discharge capacity by at least 50% at various current densities (0.1–1.5 mA/cm2). Multistep discharge at decreasing current rates (2.0, 1.5, and 1.0 mA/cm2) is also proposed to increase the overall discharge capacity with a given cutoff voltage. The performance improvement is mainly due to the enhanced O2 diffusion during rest between intermittent discharge. The lyophilic electrode has the highest increase rate of discharge capacity after applying intermittent current while the electrode with mixed wettability achieves the highest specific discharge capacity. The resting and discharging time of electrodes with mixed wettability are then optimized at 1.0 mA/cm2. Cycling tests with 1000 mA h/g and 1500 mAh/g cut-off capacities at 1.0 mA/cm2 are also performed. The batteries completed similar numbers of cycles with a higher cut-off capacity (1500 mAh/g) applying intermittent discharge, compared with applying continuous current (1000 mAh/g cut-off capacity). This study emphasizes the importance of O2 diffusion and provides practical strategies to improve the deep discharge capacity of Li-O2 batteries, especially at high current rates (>1.0 mA/cm2).

The expired waste medicines would result in the waste of the resource and the environment pollution if they were not reasonably disposed. Although the expired medicines are not continuously used for the clinical therapy of the diseases anymore, there still exist the non-medical values within the expired medicines. Therefore, it is urgent to reasonably reutilize the expired medicines. For this purpose, the non-medical values of the expired waste Aspirin as the anode material in lithium-ion battery were exploited for the first time. The microstructure and element component of the expired waste Aspirin powders were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), 1H nuclear magnetic resonance spectroscopy (1H-NMR), and Fourier transform infrared spectroscopy (FTIR); furthermore, the corresponding electrochemical performances were also measured by the methods of galvanostatic charge/discharge and cyclic voltammetry (CV). The results showed that the expired waste Aspirin powders consisted of many rod-like nanoparticles and the effective component remained acetylsalicylic acid. Especially, the expired-Aspirin-based anode delivered the initial specific discharge capacity of 342.9 mAh/g and the reversible specific discharge capacity of 330.3 mAh/g even after 450 cycles. These satisfactory results would shed a new light on the reuse of the expired waste medicines as the energy materials and open a new avenue to the cyclic economy and sustainable development.

Cu-Zn-Co oxide nanoflakes were grown on Ni-foam using a hydrothermal method. FESEM revealed a thin nanoflake-like morphology. The Cu-Zn-Co oxide nanoflakes exhibited a maximum specific capacity of 215 C g−1 at a scan rate of 5 mV s−1 and 178 C g−1 at a specific current of 1 A g−1. When used as a Li-ion battery electrode, the Cu-Zn-Co oxide nanoflakes exhibited a specific discharge capacity of 1117 mA h g−1 in the second cycle with excellent cycling stability. This superior cycling stability of the Cu-Zn-Co oxide nanoflakes was attributed to the direct attachment of Cu-Zn-Co oxide nanoflakes on Ni-foam.

This article reports for the first time ultrafast automatic flame synthesis of high-quality LiCoO2 in open-air conditions as a cathode material for Li-ion batteries. This synthetic method offers the advantages of simplicity, energy, and time saving, as well as low cost with better electrochemical performance than the commercial LiCoO2. The reported method provides the opportunity to develop the scheme, to produce not only LiCoO2 but also commercially available isomorphs of lithium metal oxides as cathode materials beyond laboratory-scale limitations. The entire procedure is completed within 30–50 min, which is the easiest way to obtain LiCoO2 among the reported procedure so far. It can be found that the automatic flame-synthesized LiCoO2 has a better crystal structure and higher specific discharge capacity than the commercial LiCoO2 at all C rates, particularly at higher C rates.

In the modern practice of hydraulic engineering pressure hydrosystems reach H ≥ 200 m. In these conditions the most efficient spillway structure is the vortex shaft spillway. In this paper, the authors consider the conjugation of the swirled flow at the outlet of the discharge conduit with downstreem by thrown jet with a residual twist. In the scheme with jet drop, the residual twist of the flow during the release from the vortex spillway contributes to the expansion of the jet in the air, reducing the specific flow rate, as well as reducing the dynamic loads on the lower bed. The comparison with the jet thrown from the sock of the drainage dam at the same speed parameters (i.e. at the speed of 20-25 m/s on the lip) is carried out. The formula obtained is simple enough to determine the planned outline of the discarded jet. The scheme of conjugation of the jet with the surface of the lower tail water, as well as the calculation scheme to determine the specific discharge of the downward swirling jet.