scholarly journals The Corrosivity Level of Rawa Pening Downstream Surface Water in the Dry and Rainy Season

2020 ◽  
Vol 17 (3) ◽  
pp. 215-222
Author(s):  
Purwono Purwono ◽  
Wiharyanto Oktiawan ◽  
Titik Istirokhatun ◽  
Agus Nurfaiz
Keyword(s):  
Surface Water ◽  
Rainy Season ◽  
Agricultural Land ◽  
Ph Value ◽  
Dry Season ◽  
Hydroelectric Power ◽  
Geological Material ◽  
Measurement Results ◽  
Microbiological Parameters

Corrosion is an important factor that can affect the quality of air used by humans. This has an impact on health and economic factors, damage to air distribution equipment. The level of corrosivity of surface water as raw water for drinking water is important to be examined before the water enters the processing process or other uses such as hydroelectric power (PLTA). This study aims to measure the level of water corrosivity on the surface of the Pening swamp during the dry and rainy seasons in 2018. Taking air samples on the surface of the Pening swamp, then carrying out laboratory tests on the parameters of air corrosivity. The results showed that the downstream surface of the Pening swamp was not corrosive in terms of pH, temperature, TDS, and chloride parameters. The pH value in the dry season (J1) is 7.00, while in the rainy (J2) it is 7.77 and is non-corrosive. The temperature values are 28.6oC and 29.3oC in the rainy and dry seasons, respectively. The TDS measurement results in the dry season are lower than the rainy season by a difference of 12 mg / l. In the dry season it is 141 mg / l and the rainy season is 153 mg / l. This increase probably came from geological material (geological material) such as rocks and soil around the Pening Swamp Lake. Other sources of TDS include urban land, road workers, agricultural land and pasture. Human activities also increase in the increase of TDS in water including domestic activities (bathing and washing), trade, and industry. Chloride levels were 2.19 mg / l and 3.19 mg / l. This research has implications for the users of Sungai Pening Swamp. The corrosivity of air measurement is also by microbiological parameters which need to be investigated further.

scholarly journals Heavy Metals Assessment of Abattoir Effluent on Surface Water Quality of River Katsina-Ala of Benue State, Nigeria

2015 ◽  
Vol 49 ◽  
pp. 90-98 ◽  
Author(s):  
Addy Jose Vershima ◽  
Kabough Jonathan Terkimbi ◽  
Azua Terese ◽  
Aliyu Ibrahim
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Heavy Metal ◽  
Surface Water ◽  
Rainy Season ◽  
Metal Content ◽  
Surface Water Quality ◽  
Dry Season ◽  
Heavy Metal Content

Water samples of six sampling sites (two downstream, two abattoir sites and two upstream sites) were analyzed using standard methods to determined and assessed heavy metal content of abattoir effluent on surface water quality of River Katsina-Ala, Benue State, Nigeria for rainy and dry seasons. Rainy season heavy metals results were; Cr6+ (0.032+0.06mg/l); Mn2+ (0.16+0.034mg/l); Cu2+ (0.86 +0.46mg/l); Pb2+(0.006+0.002mg/;Cd2+(0.0023+0.004mg/l) and the dry season results were: Cr6+(0.028+0.007mg/l); Mn2+(0.07+0.05mg/l); Cu2+(0.85+0.16mg/l); Pb2+(0.0030+0.014mg/l); Cd2+(0.0021+0.012mg/). Most heavy metals for both seasons were within the maximum permissible limit set by Federal Ministry of Environment, Nigeria (1991). The mean concentrations of Zn2+(1.70+0.29 mg/l) for rainy season and Zn2+(1.33+0.23mg/l) dry season were above the control and standard safe limits of < 1mg/l FMEnv (1991) for surface water quality. There was no significance difference (p<0.05) between the means from upstream and downstream sites for both seasons; though significance difference (p<0.05) existed at the abattoir sites. River Katsina –ala is slightly polluted. Heavy metal content from effluents from abattoir contributed to upset the physicochemical balance of the river. Bioaccumulation and bio-magnification of heavy metals may occur from prolong usage of the river water for drinking. It is suggested that the abattoir effluent be treated before discharge into the river to reduce environmental and health hazards.

scholarly journals KEMADIRIAN PAKAN BERBASIS HIJAUAN LOKAL UNTUK KERBAU DI PROVINSI BANTEN

Pastura ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 83
Author(s):  
Prihantoro I. ◽  
Aryanto A.T. ◽  
Karti P.D.M.H.
Keyword(s):  
Carrying Capacity ◽  
Agricultural Land ◽  
Smallholder Farmers ◽  
Dry Season ◽  
Botanical Composition ◽  
Smallholder Farms ◽  
Feed Resources ◽  
Self Sufficiency ◽  
Natural Grassland

Forage is the main feed of buffalo in smallholder farms. The need of forage will increase along to the increased demand of buffalo population. Buffaloes are kept as semi-intensive in natural grassland, house yard and integrated with agricultural land. Forages availability for buffalos are low in the dry season. The aim of this research is to measure the potential forage and the strategy for self-sufficiency of forage for buffalo in Province of Banten. The research was conducted in buffalo pasture (natural and integrated with paddy fields) managed by smallholder farmers in Lebak and Serang Regencies, Banten Province. Parameters measured include: (1) botanical composition of forage, (2) forage carrying capacity, (3) types of feed crops in buffalo pastures, (4) quality of silage and hay products from buffalo pasture. The results showed that botanical composition was varied with predominant vegetation dominance was grasses (56.55-95.94%), low and varied carrying capacity (0.29 ± 0.17 - 0.98 ± 0.39 AU/ha), 24 types of forage plant were found which are potential as buffalo feed. Silage and hay from buffalo grassland were potential as feed resources in the dry season. Keywords: buffalo, natural grassland, self-sufficient feed, smallholder

scholarly journals Hydrogeological, hydrochemical, and natural isotopes evaluation of groundwater and surface water interactions in the alluvial plain, tropical region of southeastern Brazil

2021 ◽  
Author(s):  
Waldilene Correa ◽  
Sueli Pereira ◽  
Joaquim Ernesto Bernardes ◽  
Paulo Ricardo Pereira
Keyword(s):  
Surface Water ◽  
Groundwater Flow ◽  
Rainy Season ◽  
Dry Season ◽  
Alluvial Plain ◽  
Morphological Features ◽  
Southeastern Brazil ◽  
Wet Season ◽  
Natural Isotopes ◽  
Abandoned Meanders

Groundwater-Surface water interactions in alluvial plains facing morphological features are the subject of the study. Considered transitions zones, alluvial plains have different morphological features interfering with groundwater flow and hydrochemistry. The alluvial plain of Mogi Guaçu river (southeastern Brazil) presented topography-controlled groundwater flow, nevertheless, natural levees, wet fields, oxbow lakes, and abandoned meanders can control local flow and interfere in discharges points of the main river. Two sampling water campaigns were done in the dry and wet season for physicochemical and natural isotopes analysis, collecting in total 44 groundwaters samples from monitoring wells and eight water samples from the river, creek, and lake. The groundwaters in wet fields and terraces, and surface waters from creek and lake presented low mineralization (EC from 8 to 37 μS.cm), pH acidic (4.98 to 5.8), and essentially Ca and Na-HCO composition. River waters samples presented pH between 5.92 e 7.69 (acidic in the rainy season and basic in the dry season), and EC from 24.2 and 181.1 μS/cm (lower values in the wet season), Na-HCO and Na-HCO-SO (dry season) and Ca-HCO and Na-HCO (rainy season) compositions. In dry season groundwaters composition showed evolution from sodium mixed (SO – HCO) to bicarbonate waters and higher mineralization; in wet season waters varied from Ca to Na-HCO composition and low mineralization, denoting dilution due to rainwater infiltration. Closer to the river margins, in abandoned meanders and oxbows, the groundwaters have increased values of EC and major ions indicating GW-SW mixtures, and effluent-influent changes (descendent and ascendent flux) in wet and dry seasons, respectively. Natural isotopes in groundwaters imply meteoric origin, without evaporation during recharge and high d-excess can be influenced by continental air masses and Amazonia Basin low-level jet. Shallow water table, permeable silty-sand material of vadose zone, flat terrain, and pristine conditions can contribute to direct infiltration of rainwaters, recharging the shallow aquifer.

scholarly journals ĐẶC ĐIỂM PHÂN BỐ CÁC MUỐI DINH DƯỠNG TRONG NƯỚC ĐẦM Ô LOAN, TỈNH PHÚ YÊN (2012-2014)

2019 ◽  
Vol 19 (1) ◽  
pp. 57-66
Author(s):  
Le Thi Vinh ◽  
Nguyen Hong Thu ◽  
Pham Huu Tam ◽  
Le Trong Dung
Keyword(s):  
Water Quality ◽  
Rainy Season ◽  
Average Concentration ◽  
Dry Season ◽  
Increasing Trend

The results of three surveys in the O Loan lagoon in the dry season (April 2013) and the rainy season (December 2012 and December 2014) showed that in the rainy season the average concentrations of nutrients in waters (ammonium: 76.8 μgN/l, nitrite: 13.9 μgN/l, nitrate: 55 μgN/l and silicate: 4021 μgSi/l) tended to be higher than those in the dry season (ammonium: 6.0 μgN/l, nitrite: 2.6 μgN/L, nitrate: 35 μgN/l and silicate: 1973 μgSi/l) while phosphate concentraiton did not differ between the two seasons with an average concentration of 66.8 μgP/l in rainy season and 60 μgP/L in dry season. By space, the concentrations of nutrients except nitrate in the lagoon, especially in the southern part, were usually higher than those in the canal connected to the sea. At O Loan lagoon waters, only ammonium (mainly in the southern part of the lagoon) and nitrate (mainly in the canal and southern part of the lagoon) concentrations were higher than the criteria values in the rainy season (December 2014) with pollution coefficient of about 1.2. However, the water quality of O Loan lagoon regarding nutrients always still needs to be monitored because from 1992 to the surveyed time, the concentrations of nutrients containing nitrogen and phosphate had the increasing trend in both seasons.

scholarly journals Limnological Quality: Seasonality Assessment and Potential for Contamination of the Pindaré River Watershed, Pre-Amazon Region, Brazil

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 851
Author(s):  
Jamilly N. Muniz ◽  
Klinger G. Duarte ◽  
Fábio H. Ramos Braga ◽  
Neuriane S. Lima ◽  
Darlan F. Silva ◽  
...  
Keyword(s):  
Rainy Season ◽  
Principal Component ◽  
Dry Season ◽  
Water Drainage ◽  
Multivariate Statistical ◽  
Data Set ◽  
E Coli ◽  
Sampling Points ◽  
Microbiological Parameters ◽  
Nitrite Nitrate

Watersheds are defined as a set of lands where water drainage occurs through rivers and their tributaries. A large quantity of water resources exist in the state of Maranhão, Brazil, where rivers and their basins must meet environmental quality standards defined by the limits set out in national environmental council (CONAMA) legislation 357/05 for physicochemical and microbiological parameters, including parasites. Multivariate statistical techniques were applied to study the temporal and spatial variations in water quality of a segment of the Pindaré River. The data set included nine parameters for three sampling points over eleven months. Principal component analysis grouped the monitored sampling points into four clusters and identified electrical conductivity, temperature, total dissolved solids (TDS), pH, salinity, and Escherichia coli as being associated with the dry season and nitrite, nitrate, and turbidity as being associated with the rainy season. Three principal components explained 83.80% of the data variance during the rainy and dry seasons. The evaluated correlations indicated that during the rainy season, nitrite (~0.18 mg L−1) and turbidity (~46.00 NTU) levels were the highest, but pH was at its lowest (~6.61). During the dry season, TDS (~155.00 mg L−1) and pH (~8.10) were highest, and E. coli bacteria was more abundant.

Date of pruning of Guazuma ulmifolia during the rainy season affects the availability, productivity and nutritional quality of forage during the dry season

2013 ◽  
Vol 87 (4) ◽  
pp. 917-927 ◽  
Author(s):  
Eloisa Ortega-Vargas ◽  
Silvia López-Ortiz ◽  
Juan Andrés Burgueño-Ferreira ◽  
W. Bruce Campbell ◽  
Jesús Jarillo-Rodríguez
Keyword(s):  
Rainy Season ◽  
Nutritional Quality ◽  
Dry Season ◽  
Guazuma Ulmifolia

scholarly journals Some Factors Affecting Quality of Crude Palm Oil Sold in Douala, Cameroon

2016 ◽  
Vol 6 (1) ◽  
pp. 50 ◽  
Author(s):  
Fabrice F. D. Dongho ◽  
Inocent Gouado ◽  
Lambert M. Sameza ◽  
Raymond S. Mouokeu ◽  
Adelaïde M. Demasse ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Palm Oil ◽  
Peroxide Value ◽  
Rainy Season ◽  
Dry Season ◽  
Impurity Level ◽  
Crude Palm Oil ◽  
Factors Affecting ◽  
Small Holder

Crude palm oil (CPO) is an essential ingredient of Cameroonian recipes. However, its quality is subject to doubt, considering the very often inadequate conditions of extraction, conditioning, storage, and selling in the fast growing small holder sector or in the market. This work aimed to evaluate the influence of seasons and containers on the microbiologic, physicochemical quality and the carotenoids content of CPO sold in Douala. A total of 194 samples of CPO were randomly collected in seven markets among which: 95 during the rainy season and 99 during dry season; 93 from CPO contained in opened containers and 101 in closed containers. In these samples, aerobic count colony (ACC) load, total yeasts and moulds load, peroxide value (PV), free fatty acids content (FFA), impurity level and carotenoids content were assayed.The samples tested had ACC load of 4.48±1.86x105 CFU/ml, total yeasts and moulds load of 0.30±0.14x105 CFU/ml, PV of 1.81±0.74 meqO2/kg, FFA of 4.30±1.82%, impurity level of 0.34±0.16% and carotenoids content of 756.41±110.67 mg/l. Also, none of these parameters had varied according to the market. Moreover, among these parameters, PV and carotenoids content were not varied whatever CPO is sold during rainy or dry season, in open or closed containers while others parameters analysed were significantly (P<0.05) higher during dry season or when the CPO was contained in open containers. Consequently, traders should make efforts to avoid CPO contamination during the selling. They could package it first and store it in an adequate space particularly during dry season. 

scholarly journals Phytoplankton dynamics in a highly eutrophic estuary in tropical Brazil

2010 ◽  
Vol 58 (3) ◽  
pp. 189-205 ◽  
Author(s):  
Marilene Felipe Santiago ◽  
Maria da Glória Gonçalves da Silva-Cunha ◽  
Sigrid Neumann-Leitão ◽  
Kátia Muniz Pereira da Costa ◽  
Gislayne Cristina Borges Palmeira ◽  
...  
Keyword(s):  
Environmental Quality ◽  
Rainy Season ◽  
Diversity Indices ◽  
Dry Season ◽  
Northeastern Brazil ◽  
Species Diversity Indices ◽  
Negative Impacts ◽  
High Level ◽  
Social Area

The port of Recife in northeastern Brazil is an important ecological and social area but little is known about its environmental quality. Observations, sampling and measurements of phytoplankton were performed during spring and neap tides in the dry (January-February, 2005) and rainy (June, 2005) seasons to assess the environmental quality of the port of Recife. The area had chlorophyll-a concentrations ranging from 3.30 to 54.40 mg m-3, the highest values occurring at low tide during the dry season. A total of 129 species were identified: 53 of them in the dry season and 97 in the rainy season. Diatoms were the most diverse group and comprised 75.47% of the phytoplankton collected in the dry season and 60.82% of those collected in the rainy season. The dry season was characterized by Coscinodiscus sp. and Helicotheca tamesis; the rainy season by Oscillatoria sp. and Coscinodiscus centralis. Species diversity indices varied from 1.06 to 3.74 bits cel-1. Low indices were related to the dominance of Helicotheca tamesis, Coscinodiscus centralis, Coscinodiscus sp. and Aulacoseira granulata. Seasonal forcing, rather than the estuarine flux, determined the phytoplankton community structure. The area is exposed to seasonally varying negative impacts due to metropolitan degradation and the high level of eutrophication.

scholarly journals Distribution Characteristics and Seasonal Variation of Soil Nutrients in the Mun River Basin, Thailand

2018 ◽  
Vol 15 (9) ◽  
pp. 1818 ◽  
Author(s):  
Zhonghe Zhao ◽  
Gaohuan Liu ◽  
Qingsheng Liu ◽  
Chong Huang ◽  
He Li ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
River Basin ◽  
Soil Nutrients ◽  
Rainy Season ◽  
Ph Value ◽  
Soil Nutrient ◽  
Nutrient Content ◽  
Dry Season ◽  
Strong Variation ◽  
Geostatistical Methods

Based on soil sampling data from the dry season and the rainy season, the spatial heterogeneity and spatial pattern of soil nutrients in the Mun River Basin, Thailand, were studied and the seasonal variation in soil nutrients was analyzed using classical statistical methods and geostatistical methods. The soil nutrient content in the Mun Basin showed moderate and strong variations, and the descending order of soil variability was as follows: available phosphorous (AP) > electric conductivity (EC) > soil organic matter (SOM) > total nitrogen (TN) > pH value in the dry season, with AP showing strong variation, and EC > AP > SOM > TN > pH in the rainy season, with EC showing strong variation. Different soil nutrients and different soil properties had different spatial variation characteristics, and their corresponding best-fitting models were also different. Based on the nugget (C0), sill (C0 + C), and range (A), spatial analysis was performed for the soil nutrients, pH, and EC in the dry season and in the rainy season. Analysis based on kriging spatial interpolation data showed that pH, SOM, TN, and EC had convex or concave distributions, whereas AP had a patchy distribution. Terrain, vegetation, and human disturbance are the main factors that contribute to the differences in the soil nutrient pattern of the Mun River Basin.

scholarly journals Penyisihan Parameter TSS dan COD Menggunakan Koagulan Nanokitin dan Kitosan pada Pengolahan Air Sungai Cikapundung

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Memey Suhaya Putri ◽  
Etih Hartati ◽  
Djaenudin Djaenudin
Keyword(s):  
River Water ◽  
Government Regulation ◽  
Ph Value ◽  
Negative Impact ◽  
Oxygen Demand ◽  
Quality Standard ◽  
Coagulation And Flocculation ◽  
Measurement Results ◽  
Time Variations

<p>The use of excessive synthetic coagulants and continuously will have a negative impact because of the increasing amount of mud volume can accumulate in the human body. The quality of Cikapundung River water has decreased every year, so it is necessary to treat Cikapundung River water through a process of coagulation and flocculation using coagulants made from nanocytin, chitosan and commercial chitosan. Measurement of these parameters uses the gravimetric and titrimetri method. The dose of coagulant used in the process of coagulation and flocculation is 10 mg / L, by varying the pH value of pH 5, pH 7 and pH 9 and the flocculation time variations of 15 minutes, 20 minutes and 25 minutes. The measurement results showed with a dose of coagulant 10 mg / L, commercial chitosan pH 5 flocculation times of 25 minutes can reduce the TSS concentration of 12 mg / L with 99.38% total suspended allowance. Concentration of Chemical Oxygen Demand 13.12 mg / L with 98.91% allowance. The TSS value has fulfilled the quality standard according to Government Regulation Number 82 of 2001 concerning Management of Water Quality and Water Pollution Control in the first class.</p>

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