Livestock Water Research Articles

Farm dam accounting for healthy and safe agricultural catchments

ABSTRACT Farm dams are essential infrastructure for many farming operations, including livestock watering and crop irrigation. With demand for food increasing, many farmers are looking to capture, store and use more runoff to achieve higher yields under worsening climate extremes. The aim of this article is to advance understanding of farm dams in catchments and the current tools for accounting for them, providing an opportunity to consider a new runoff storage accounting framework to support integrated policy. The Australian dam management setting is provided for context. A longitudinal cohort survey of 254 South Australian farmers provides a snapshot of farmer perceptions of dams and dam management behaviours. Farmers express increasing concern about the future availability of water, how much is allocated to the environment and how this is accounted for. Whilst the field of IWRM and others have integrated disciplines for improved water decision-making, so far there has been limited attention to how to incentivise improved farm dam management through links to farm accounting and business. This study proposes a preliminary framework for assisting dam decision-making across scales to support the health and safety of environments and communities.

Assessment of surface water resource and allocation optimization for diverse demands in Ethiopia's upper Bilate Watershed

Water planning and management is very crucial for all computing sectors for water uses to maximize the scarce and allocated water uses based on their demands sustainably in Ethiopia's upper Bilate watershed. The shortage of surface water, especially during dry months, has become a major point of contention between upstream and downstream water users in the upper Bilate River. Therefore, the key objectives of the study are to evaluate the surface water resources and determine the best distribution for a range of requirements in the watershed. The historical climatic and stream flow daily data for the period of 2010–2019 have been used for the analysis. Hydrologic Engineering Center Hydrologic Modeling System-Geospatial Hydrologic Modeling Extension with the Hydrologic Engineering Center Hydrologic Modeling System was used for rainfall-runoff analysis. The model output further represents that the yearly overall surface water of the watershed is 502 MC M. Estimated annual environmental requirement is 75.32MCM which is 15% of the average annual available flow in watershed. Current annual irrigation, livestock, and domestic water demand were estimated to be 19.34 MC M, 12.39 MC M, and 79.4 MC M, respectively. The net amount of water delivered was 19.25 MC M, 79.28 MC M, and 12.36 MC M for irrigation, domestic, and Livestock demands, respectively, in the reference scenario. In the currently available (reference) scenario, 99.8% of the water supply need had been fulfilled, yet only 0.2% of the requirements for water were unmet. Average annual water demand of 111.13 MC M in the current scenario growth to 176.08 MC M when the future growth scenario. In contrast, for the future irrigation development and population projections scenario, 69.8% of the supply-demand became acquainted, and 30.2% of the demand for water remained unfulfilled in 2035. Therefore, to realize good water availability for productive use and allocate water optimal manner constructing a hydraulic structure (dam) upstream of the watershed was recommended.

Global Burden of Lumpy Skin Disease, Outbreaks, and Future Challenges.

Lumpy skin disease (LSD), a current global concern, causes economic devastation in livestock industries, with cattle and water buffalo reported to have higher morbidity and lower mortality rates. LSD is caused by lumpy skin disease virus (LSDV), a member of the Poxviridae family. It is an enzootic, rapidly explorative and sometimes fatal infection, characterized by multiple raised nodules on the skin of infected animals. It was first reported in Zambia in 1929 and is considered endemic in Africa south of the Sahara desert. It has gradually spread beyond Africa into the Middle East, with periodic occurrences in Asian and East European countries. Recently, it has been spreading in most Asian countries including far East Asia and threatens incursion to LSD-free countries. Rapid and accurate diagnostic capabilities, virus identification, vaccine development, vector control, regional and international collaborations and effective biosecurity policies are important for the control, prevention, and eradication of LSD infections. This review critically evaluates the global burden of LSD, the chronological historical outbreaks of LSD, and future directions for collaborative global actions.

Demonstration of Rhodes grass (Chloris gayana Kunth) varieties at selected highland and midland agro-ecologies of Guji zone, Oromia, Ethiopia

Guji zone has different agro-ecologies suitable for livestock production. However, grazing land was shrinking for the production of feed which is the most pre-request for livestock production. As a result, farmers used pasture and crop residues which are insufficient and not available during the dry season. Hence, there was a feed shortage at different agroecologies. Rhodes grass is used as livestock feed, soil, and water conservation but improved Rhodes grass varieties were not intensively produced by farmers and hence feed shortage is affecting the supply of livestock products for household consumption. Improved Rhodes grass is the possible solution for feed shortage due to it is intensively harvested throughout the year and ensures feed availability for livestock. Therefore, a demonstration of Rhodes grass is needed on a farmer’s field. The objective of this study was to evaluate the performance of Rhodes grass on farmers’ plots. Adola Rede (midland agroecology) and Ana Sora (highland agroecology) were selected based on their livestock and Rhodes grass production potential. Masaba and ILRI-7384 Rhodes grass varieties were demonstrated on a 50 m2 plot area. Descriptive statistics were used to analyze the data. Accordingly, the Masaba variety was highly performed in plant height (108.6 cm), fresh biomass (4.24t/ha), and survival rate (83.4%) than ILRI-7384 accession at both agroecologies. Except in seed yield at the highland area in all traits, the Masaba variety was well performed than ILRI-7384. The result of one-way ANOVA revealed that across agroecology fresh biomass yield and survival rate of Masaba was a statistically significant difference at 10% and 5% respectively. Farmers liked to produce Rhode grass varieties. Fresh biomass and survival rate was important trait obtained from the Masaba variety in both agro-ecologies. Thus, the Masaba variety was recommended for livestock feed at highland and midland agro-ecologies of the Guji zone.

Foresight study on dairy farming systems in Central Kenya and north of Senegal

Dairy farming activities play important roles in nutrition and health, livelihoods and employment, and culture, in Kenya and Senegal. Faced with various challenges such as climate change, increased populations, insecurity, and conflicts over (water, land, feed) resources, dairy production systems will have to undergo changes in the future that allow them to adapt. This study used a qualitative foresight approach that is mainly based on interviews with technical experts and key stakeholders, including dairy cattle herders, to identify the main evolution trends to be observed in dairy farming in Central Kenya and north of Senegal. It found that (semi)-intensification of production systems and increased settlement of herders who are nomad pastoralists are the prevailing trends. These trends are likely to persist into the future. For both countries, the key drivers of change and their potential environmental and socio-economic impacts were investigated. As dairy systems continue to confront challenges related to livestock feed and water availability, milk quality and safety, production costs, and market access, strategies are needed that can improve resilience of the systems while attaining the right balance between productivity and sustainability.

Experimental prosopis management practices and grassland restoration in three Eastern African countries

Woody species have been introduced in many parts of the world to provide economic benefits, but some of those species are now among the worst invaders, causing widespread economic and environmental damage. Management of woody species to restore original ecosystem services, such as biodiverse grassland that can provide fodder and sequester carbon, are needed to limit the impacts of alien species. However, the best management methods, i.e., the most economically efficient and effective way to remove trees and the most effective way to restore or rehabilitate the cleared land, are not developed for many species. In Eastern Africa, prosopis (Prosopis julifora) has invaded large areas of savanna and grassland, thereby affecting, among other things, fodder and water for livestock, access to dry season grazing lands and ultimately pastoral livelihoods. We tested three prosopis treatments (manual uprooting and cut stump and basal bark herbicide application) in combination with three incremental restoration interventions (divots, divots + mulching, divots + mulching + grass seed sowing). The three-year study was replicated in Ethiopia (Afar National Regional State), Kenya (Baringo county) and Tanzania (Moshi district). Prosopis survival and vegetation development, both diversity and biomass, were recorded. The prosopis treatments were all highly effective (between 85 and 100% tree mortality in almost all cases), but the two treatments that involved the complete removal of the aboveground biomass (manual and cut stump) yielded a more productive and more diverse vegetation than the treatment that killed the trees standing (basal bark). Compared to the effect of prosopis removal, the effect of restoration interventions on vegetation composition was small, indicating that most species re-established from the soil seed bank. The results show that it is possible to restore land previously invaded by prosopis. Despite the different rates of vegetation establishment and variation in species composition, the restoration interventions resulted in vegetation that in some cases contained a substantial fraction of perennial grasses. The method chosen to control prosopis depends on the availability of resources, including herbicides, and the need to remove rootstocks if the intention is to plant crops.

Modeling of a stand-alone solar photovoltaic water pumping system for irrigation

Solar photovoltaic water pumping systems have been research topics in recent decades. The purpose was to develop much more profitable and efficient systems to meet the needs of pumping water for livestock and irrigation. This paper describes the design of a stand-alone photovoltaic water pumping system. A Boost converter is used to apply the Maximum Power Point Tracking (MPPT) algorithm. Similarly, a three-phase voltage source converter (VSC) is used to supply the asynchronous motor. The installation must provide a continuous water flow during the irrigation interval. It has been verified that in adverse weather conditions (cloud transits or partly cloudy) it is necessary to incorporate a decentralized-hybrid energy storage system (based on batteries or ultracapacitors), or excessively oversize the standalone photovoltaic system, to supply the water pump. The model has been simulated in Matlab-Simulink. In this way, different simulations have been developed to verify the basic characteristics of the proposed system. The results of the simulated model and the conclusions obtained are also presented in this paper.

Analysis of Drinking Water Quality in Honakere Hobli

Abstract: Water is the most essential and valuable natural gift to mankind as well as the producer and consumer of this planet. Without water there would have been no life, hence it is a matrix of life.It is vital for many aspects of economic and social development. To analyse water quality, different approaches like statistical analyses of individual parameters, multi-stressors water quality indices. Rivers are the lifeline of living beings and constitute an integral part of both rural and urban communities as a source of drinking and cooking purposes. Water used by the public must be free from disease-causing bacteria, toxic chemicals, and excessive amounts of minerals and organic matter. It is important to test the suitability of water quality for its intended purpose, whether it is livestock watering, irrigation, spraying, or drinking water. The purpose of this section is to provide water quality testing information for the village of Nagamangala Taluk that will assist residents using a water supply. It provides information on the importance of water quality monitoring. Out of 20 villages, 8 villages’ water samples are not ideal for drinking purposes because of the higher concentration of TDS, TH, Cl, Ca, SO4, Fe, alkalinity, Mg, and Cd is more in that water samples. And other village water samples are suitable for drinking purposes. Since most of the families from the economically weaker sections of the society directlyconsume the tap water supplied by the village water supply system without any treatment.However, it is important to monitor the quality of drinking water regularly in rural areas where there is more population growth.

Water Consumption by Livestock Systems from 2002–2020 and Predictions for 2030–2050 under Climate Changes in the Czech Republic

The livestock system in Europe relies on a complex holistic equilibrium that is the outcome of an interplay of demand, market, crop production, livestock production, land use, water availability, and other factors. When modeling future scenarios of water consumption by livestock systems, the most suitable tools result from the interconnectivity of growth models, economic models, and climate models. We integrated the Environmental Policy Integrated Climate growth model (EPIC), animal-level model (RUMINANT), economic model (Global Biosphere Management Model, GLOBIOM), EURO-CORDEX climate models, and regression models. This study developed novel livestock production scenarios for individual regions of the Czech Republic with estimations of the categories of livestock that have been bred during the last 20 years and will be bred in the future and what their water consumption will be, both throughout the year and in particular seasons. First, the numbers of farm animals, namely, cattle, pigs, sheep, horses, goats, and poultry in 2002–2020 were evaluated, and their numbers were predicted for the following years until 2050. Second, livestock water consumption per region was determined based on the number of livestock individuals. Third, changes in the amount of water consumed by livestock per year in individual regions in 2050 compared to 2005 were estimated.

Identification of Brush Species and Herbicide Effect Assessment in Southern Texas Using an Unoccupied Aerial System (UAS)

Cultivation and grazing since the mid-nineteenth century in Texas has caused dramatic changes in grassland vegetation. Among these changes is the encroachment of native and introduced brush species. The distribution and quantity of brush can affect livestock production and water holding capacity of soil. Still, at the same time, brush can improve carbon sequestration and enhance agritourism and real estate value. The accurate identification of brush species and their distribution over large land tracts are important in developing brush management plans which may include herbicide application decisions. Near-real-time imaging and analyses of brush using an Unoccupied Aerial System (UAS) is a powerful tool to achieve such tasks. The use of multispectral imagery collected by a UAS to estimate the efficacy of herbicide treatment on noxious brush has not been evaluated previously. There has been no previous comparison of band combinations and pixel- and object-based methods to determine the best methodology for discrimination and classification of noxious brush species with Random Forest (RF) classification. In this study, two rangelands in southern Texas with encroachment of huisache (Vachellia farnesianna [L.] Wight & Arn.) and honey mesquite (Prosopis glandulosa Torr. var. glandulosa) were studied. Two study sites were flown with an eBee X fixed-wing to collect UAS images with four bands (Green, Red, Red-Edge, and Near-infrared) and ground truth data points pre- and post-herbicide application to study the herbicide effect on brush. Post-herbicide data were collected one year after herbicide application. Pixel-based and object-based RF classifications were used to identify brush in orthomosaic images generated from UAS images. The classification had an overall accuracy in the range 83–96%, and object-based classification had better results than pixel-based classification since object-based classification had the highest overall accuracy in both sites at 96%. The UAS image was useful for assessing herbicide efficacy by calculating canopy change after herbicide treatment. Different effects of herbicides and application rates on brush defoliation were measured by comparing canopy change in herbicide treatment zones. UAS-derived multispectral imagery can be used to identify brush species in rangelands and aid in objectively assessing the herbicide effect on brush encroachment.

Climate change and livestock herders wellbeing in Pakistan: Does nexus of risk perception, adaptation and their drivers matter?

Rural people, particularly in developing nations, rely on livestock as a key source of income. In Pakistan, rural people depend profoundly on buffalo, cows, sheep, and goats to earn their livelihood. The systems of agricultural production are at risk because of the negative effects of climate change. It badly affects production and quality of milk and meat, animal health, productivity, breeding, feed, and rangelands of livestock production. Climate change risks assessment and adaptation are required to minimize losses from these effects, which are not just technical but also socioeconomically significant. Hence, based on data collected from 1080 livestock herders using a multistage sampling technique in Punjab, Pakistan this study aims to assess perceived impact of climate change on livestock production and to assess coping strategies. In addition, determinants of adaptation strategies and their effects on livestock production was also estimated. Binary Logistic Regression was used to identify the drivers of adaptation strategies. In addition, Multi Group Analysis (MGA) in Partial Least Squares Path Modelling (PLS-PM) was applied to compare adapter and non-adapter of climate change adaptation strategies. Findings indicated that there are spread of various diseases to livestock due to adverse effects of climatic variability. There was reduction in the availability of the livestock's feed. Moreover, competition of water and land resources of livestock was also increasing. Low production efficiency resulted in decline of milk yield and meat production. Likewise, mortality of livestock, increased in still births, reduction in reproductive performance, decline in animal fertility, longevity, and general fitness, decreased birthing rates, rises in age at foremost calving in beef cattle was also prevailing. There were different adaptation policies used by farmers to handle with climate change and these were influenced by several demographic, socioeconomic, and agronomic aspects. Findings indicated that nexus of risk perception, adaptation plans and their determinants are beneficial to reduce the consequences of climatic variability and it improve the wellbeing of the herders. Risk management system may be created to protect livestock against losses caused by extreme weather events by providing awareness regarding influence of climate change on livestock. Easy and cheaper credit should be provided to the farmers to manage with the vulnerabilities of climate change.

Using dynamic modelling to enhance the assessment of the beef water footprint

Current water footprint assessment methods make a meaningful assessment of livestock water consumption difficult as they are mainly static, thus poorly adaptable to understanding future water consumption and requirements. They lack the integration of fundamental ruminant nutrition and growth equations within a dynamic context that accounts for short- and long-term behaviour and time delays associated with economically significant beef-producing areas. The current study utilised the System Dynamics methodology to conceptualise a water footprint for beef cattle within a dynamic and mechanistic modelling framework. The problem of assessing the water footprint of beef cattle was articulated, and a dynamic hypothesis was formed to represent the Texas livestock water use system as the initial step in developing the Dynamic Beef Water Footprint model (DWFB). The dynamic hypothesis development resulted in three causal loop diagrams (CLD): cattle population, growth and nutrition, and the livestock water footprint, that captured the daily water footprint of beef (WFB). Simulations and sensitivity analysis from the hypothesised CLD structures indicated that the framework was able to capture the dynamic behaviour of the WFB system. These behaviours included key reinforcing and balancing feedback processes that drive the WFB. It is extremely difficult to identify policy interventions (i.e., management strategies) for complex systems, like the U.S. beef cattle system, because there are many actors (i.e., cow-calf, stocker, feedlot) and interrelated variables that have delayed effects within and across the supply chain. Identification and understanding of feedback processes driving water use over time will help to overcome policy resistance for more sustainable beef production. Thus, the causal loops identified in the current study provide a system-level insight for the drivers of the WFB within and across each major segment of the beef supply chain to address freshwater concerns more adequately. Further, the nutrient scenarios and sensitivity analysis revealed that the high versus low nutrient composition of pasture, hay, and concentrates resulted in a significant difference in the WFB (2 669 L/kg boneless beef, P < 0.05). The WFB was sensitive to changes in nutrient composition and specific water demand (m3/t) for each production phase, not only phases with high levels of concentrate feed use. As models evolve, there is potential for the DWFB to integrate precision livestock data, further improving quantification of the WFB, precision water-efficient strategies, and selection of water-efficient livestock.

Prevention and Safety Training to Improve Community Health

Background and purpose Public health problems are caused by the emergence of environmental pollution and infectious diseases, which have caused concern around the world. The public health threat affects the relationship between people. Population growth and associated pressures increase difficulties associated with effective means of maintaining public health. The diseases transmitted from human and livestock communication, water pollution, air pollution, and environmental pollutants urge us to find new solutions to address these problems. Understanding the environmental and environmental health is a prerequisite for protecting public health. In Iran, like other countries in the world, the issue of environmental protection and its compliance with the first program of economic, social and cultural development of the Islamic Republic has begun and expanded in the future. In this regard, new perspectives are being introduced that will bring about dramatic changes at various levels of planning, processes and specialized sectors such as civil, industrial and educational sectors. The training of engineers in this regard can play a very important role in refining the attitudes of young engineers and using these bases in their specialized activities. One of the important tasks of universities is to provide a suitable platform for such training. In this regard, it is essential that the major industrial universities of the country develop various programs in this field. Materials and methods The present study is a review of the type of validity that is performed through search of authoritative scientific databases such as PubMed and Scopus, Google scholar, PubMed using the key words of building safety and health, HSE, and prevention methods are the latest information. Results Implementing the principles of HSE in various construction, industrial and other projects requires time, because any change that is considered in the system requires a change of attitude, which in turn requires time to adapt and adapt to the new conditions. The conditions for the projects in this research are their current conditions, and the next research, after a while, can determine the percentage of project progress in terms of HSE. Conclusion In order to comply with the principle of HSE cases, there is a need for training. These trainings should be executed at different levels and levels of contracting and monitoring so that the level of awareness of the risks involved in the development of civil operations between the personnel reaches a common frontier.

WATER SCARCITY IN BALOCHISTAN AND ITS IMPACT ON ITS AGRICULTURE

The research was conducted to identify water scarcity in Balochistan - a semi arid landmass ; and analyse options that could be utilised to make available water for agriculture and livestock in the province. The paper is in descriptive form based on qualitative and quantitative analysis of primary and secondary sources and information received from government departments and internet; and interviews conducted with persons related to the issue. A case study of a Pakistan Water and Power Authority (WAPDA) project of construction of small/ medium dam, illustrates the economic benefits of such dams for increasing crop intensity and cropped land. Increasing water storage capacity, recharging ground water, better water management by shifting to high efficiency irrigation systems, enhancing capacity of canals to utilise full share of Indus River, shifting to high value crops and standardising livestock would boost agriculture to ensure food security for the present and future needs of growing population. Continuous review of National Water Policy (NWP) while implementing salient features of the policy to realise its objectives.

Borrow pits rehabilitation, a gem for the promotion of livestock and wildlife potentials in asals

This study explored the potential of surface runoff water collection into borrow pits with an aim to promote livestock and wildlife potentials in Laikipia County, where the Rumuruti –Maralal bitumen road passes. Survey data on livestock and wildlife water demands; Cooks method for determination of surface runoff water collection potential, borrow pits locations, and their capacities were determined while area meteorological data and literature review enriched them. The results from the above were computed, which helped to determine the would-be benefits of water collection in the borrow pits. The study has demonstrated the greater potential that borrows pits rehabilitation. Water collected in them can highly support livestock and wildlife production. This study recommends the replication of this practice in other ASALs areas to help exploit their full potential.

Reuse of Produced Water from the Petroleum Industry: Case Studies from the Intermountain-West Region, USA

The produced water (PW) volume in the Intermountain-West (I-WEST) region is about 600 million m3 in 2021. More than one-third of the PW is injected for disposal, which can be a waste of water, considering the water scarcity in the I-WEST region. In this work, we analyzed the potential for the reuse of PW in the I-WEST region. The PW composition and volume in different basins in the I-WEST region were analyzed. The regulations for drinking water, domestic use, irrigation, livestock watering, aquatic, surface water discharge, groundwater discharge, hydraulic fracture, and hydrogen (H2) production were summarized. We identified the appropriate treatments depending on the PW composition and water standards. We also analyzed each PW treatment’s water recovery, energy demand, and cost. We selected the samples of PW from the Raton Basin, San Juan Basin, and Permian Basin to assess the potential reuse of PW in the I-WEST region. The comparison between PW composition and water standards shows that the regulations are not designed for the reuse of PW because the constituents in water regulations do not match the constituents in PW. The low-salinity PW can be treated for agricultural use with relatively low cost and high water recovery, while the high-salinity PW is more suitable for hydraulic fracturing. The treatment cost (including operation, maintenance, energy, labor, and disposal cost) ranges from $0.11/bbl to $1.01/bbl, depending on the PW composition and targeted water standards. The reuse of PW for H2 production is a promising usage purpose. Due to the high demand for fresh water in H2 production, the reuse of PW can alleviate the stress of water scarcity in the I-WEST region. This work provides guidance for the reuse of PW in the I-WEST region.

Water Use Strategies for Livestock by Pastoralists: The Case of Semi-Arid Areas in Monduli District, Arusha Region, Tanzania

The paper explores livestock water use strategies that have been employed to cope with the problem of water shortage in Monduli District, Tanzania. The study employed a cross-sectional research design. Quantitative data were collected by using an interview schedule from 367 respondents who were randomly selected from Moita and Makuyuni Wards. Focus group discussions, key informant interviews, and observations were used to supplement the collected data. The Statistical Package for Social Sciences (SPSS) version 20 was used to analyse quantitative data, while qualitative data were analysed by using content analysis. The study findings show that livestock water scarcity and high-water supply charges caused pastoralists to come up with strategies for accessing water for livestock. These strategies include selling live livestock, engagement in off-farm income generation activities, water supply for livestock schedule, Charco dam rainwater harvesting technology, migration, small ruminant birth control and the use of temporary traditional dug well. Most of the strategies used play multiple roles since they not only enhance access to water for livestock but they play other beneficial roles. For example, selling livestock and birth control serve the problem of land degradation caused by overgrazing and also overcome the conflicts between farmers and pastoralists. It is therefore recommended that such strategies should be promoted for the development of livestock and agriculture sector in general. Other strategies used are traditional, for example, the use of traditional temporary wells, which do not allow pastoralists to access water throughout the year. This calls the need for local government and development partners to come up and promote improved and permanent structures like the Charco dam and other strategies that allow water accessibility throughout the year

Hydrologic restoration of anthropoentically altered springs in the Sheldon National Wildlife Refuge in the Great Basin, USA

Springbox capped springs divert water for livestock and threaten spring conservation in the Great Basin. Springbox restoration is used to increase water availability at riparian zones and wet meadows. The purpose of our study was to compare six restoration methods used to increase soil moisture. We used a BACI design to compare percent soil moisture before and after restoration at 24 spring sites in Northwestern Nevada, U.S.A. Percent soil moisture was measured at 5-, 15-, 30-, and 45-cm depths during spring and summer months. Year 2017 was wetter than 2016 causing an increase in percent soil moisture in all restoration treatments. Empty springbox cases, cases filled with sand, and caseless gravel-filled springs produced the greatest increase in percent soil moisture at all depths. We recommend sand-filled casings because these funnel water to the surface while sand prevents casing collapse. We recommend sand over gravel because sand is easier to displace as water flows to the surface. The ratio of δ18O/d16O suggests that springs are fed by shallow groundwater derived from recent precipitation. Inter-annual reductions in precipitation driven by climate change may be the ultimate force determining the preservation of Great Basin spring ecosystems.

New methodological approach to calculations for design of energy-saving device for heating water intended for livestock watering

Relevance. The development and use of new tools and technologies aimed at energy saving in agriculture has been and remains an urgent task. The use of non-traditional and renewable energy sources has become very popular. An advanced role in this direction is acquired by the use of heat released by cattle.Methods. It is assumed that due to the free heat, which is directed to the disposal of the livestock premises, heating will occur, for which a new device for heating water has been developed. Based on the results of calculations and observations, it was decided that the device for water heating will be placed in the place where the air temperature in the livestock premises reaches maximum values. There are a number of issues that need to be solved. One of them is an important part of the design of a new heating device — this is the calculation of its constructive parameters.Results. It is necessary to take into account many factors that affect the heat generation of cows, their drinking conditions, possibility of the installation of the heat exchanger to affect the ventilation in premises, its heating capacity. The calculation of these parameters will make it possible to evaluate in real conditions of use of water heating device, working due to the release of heat from cattle. Its use will reduce the consumption of electric energy, which is used to heat water intended for cows.

Water Quality Assessment of Karnaphuli River of Bangladesh Using CCME-WQI Method

Karnaphuli River is one of the largest recipients of industrial effluent among all the rivers in Bangladesh in the last couple of years. The main purpose of this study is to evaluate the suitability of the river water for irrigation, livestock and other uses and to identify the main pollutants affecting the river during its course through the city. Ten Sampling points along with the Karnaphuli river basin was selected for the WQI assessment. The sampling was conducted for a period of one year from May 2021 to April 2022. Canadian Council of Ministers of the Environment (CCME)-(WQI) Water Quality Index was applied for several water quality parameters namely pH, Total Dissolved Solids (TDS), Dissolved Oxygen (DO), Phosphate, Nitrate, Chloride, Total Hardness, Conductivity, Biological Oxygen Demand (BOD), Cd, Cu, Zn, Pb. Irrigation and livestock indices were analyzed based on Canadian Water Quality Guidelines (CWQGs). The study shows that the river water is mostly alkaline and the pH lies between 6.4 -7.8. The DO value varies from 1.8 to 6 ppm and BOD varies from 1.7 to 3.4 ppm. The concentrations of Cu, Cd, Pb and Zn are Cu- (0.108-0.743 ppm), Cd- (0.073-0.281 ppm), Pb- (0.017-0.699 ppm), Zn- (0.012-0.032 ppm) respectively. Based on the index values, the river water quality has been observed as poor and marginal.