Spatial analysis of water quality parameters in Hilo Bay, Hawai'i, using a combination of interpolated surfaces and hot spot analysis

2021 ◽  
Vol 193 (3) ◽  
Author(s):  
Gina A. Badlowski ◽  
Jason E. Adolf ◽  
Geoffrey Fouad
Keyword(s):  
Water Quality ◽  
Spatial Analysis ◽  
Hot Spot ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Hot Spot Analysis ◽  
Spot Analysis

scholarly journals A Spatial Analysis to Define Data Requirements for Hydrological and Water Quality Models in Data-Limited Regions

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 267 ◽  
Author(s):  
Ersilia D’Ambrosio ◽  
Anna De Girolamo ◽  
Marinella Spanò ◽  
Vera Corbelli ◽  
Gennaro Capasso ◽  
...  
Keyword(s):  
Water Quality ◽  
Spatial Analysis ◽  
Surface Water ◽  
Source Parameters ◽  
Quality Parameters ◽  
Point Sources ◽  
Water Quality Parameters ◽  
Limited Area ◽  
Climatic Data ◽  
Basin Scale

The objective of the present work is a spatial analysis aimed at supporting hydrological and water quality model applications in the Canale d’Aiedda basin (Puglia, Italy), a data-limited area. The basin is part of the sensitive environmental area of Taranto that requires remediation of the soil, subsoil, surface water, and groundwater. A monitoring plan was defined to record the streamflow and water quality parameters needed for calibrating and validating models, and a database archived in a GIS environment was built, which includes climatic data, soil hydraulic parameters, groundwater data, surface water quality parameters, point-source parameters, and information on agricultural practices. Based on a one-year monitoring of activities, the average annual loads of N-NO3 and P-PO4 delivered to the Mar Piccolo amounted to about 42 t year−1, and 2 t year−1, respectively. Knowledge uncertainty in monthly load estimation was found to be up to 25% for N-NO3 and 40% for P-PO4. The contributions of point sources in terms of N-NO3 and P-PO4 were estimated at 45% and 77%, respectively. This study defines a procedure for supporting modelling activities at the basin scale for data-limited regions.

scholarly journals Evaluation of Water Quality Parameters in Shatt AL-Arab, Southern Iraq, Using Spatial Analysis

Hydrology ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 79 ◽  
Author(s):  
Zahraa Q. Lateef ◽  
Abdul-Sahib T. Al-Madhhachi ◽  
Dawood E. Sachit
Keyword(s):  
Water Quality ◽  
Spatial Analysis ◽  
Arabian Gulf ◽  
Total Dissolved Solids ◽  
Quality Parameters ◽  
Data Availability ◽  
Water Quality Parameters ◽  
Total Hardness ◽  
Dissolved Solids ◽  
Southern Iraq

The present work illustrates the potential application of techniques of spatial analysis via geographic information systems (GIS) to categorize the distribution of temporal and spatial of water prediction characteristics to determine the water quality parameters of the Shatt Al-Arab River (SAA), southern Iraq. Eight main water quality parameters and three heavy metals were measured from December 2018 to October 2019. The total dissolved solids, chloride, sulfate, and total hardness were compared with previous data that were measured from 2014 to 2018 based on data availability. The geochemical characteristics were also investigated to analyze water quality parameters. The study was performed by selecting eleven stations according to the nature areas of SAA. Water samples were acquired from the eleven stations for four seasons (winter of 2018 through autumn of 2019). Results revealed that total dissolved solids ranged between 950 to 8500 mg/L, total hardness varied from 400 to 2394 mg/L as calcium carbonate (CaCO3), the sulfate ranged from 149 to 1602 mg/L, and chloride ranged from 330 to 3687 mg/L. The results showed that SAA had high salinity with a low hazard of sodicity. The SAA waters mainly fall below the Dolomite-Magnesite tie-lines which indicated the dissolution of carbonate rocks. This research also found that the study area confined from Al-Maqal station to Abu Flus port station where the salty marine water coming from the Arabian Gulf remains for longer periods. The SAA is not suitable for drinking and irrigation water according to Iraqi and World Health Organization (WHO) standards. This study suggested building a blocking dam downstream of the SAA to prevent salty water from coming back from Arabian Gulf.

scholarly journals SPATIAL ANALYSIS OF CRIME HOT-SPOT IN THE NORTHEAST PENANG ISLAND DISTRICT AND KUCHING DISTRICT, MALAYSIA

2021 ◽  
Vol 19 ◽  
Author(s):  
Tarmiji Masron ◽  
Mohd Norashad Nordin ◽  
Nur Faziera Yaakub ◽  
Norita Jubit
Keyword(s):  
Spatial Analysis ◽  
Drug Abuse ◽  
Hot Spots ◽  
Hot Spot ◽  
Hot Spot Analysis ◽  
Police Station ◽  
Points Of View ◽  
Spatial Analysis Of Crime ◽  
Over Time ◽  
Spot Analysis

Over time, the relation between criminal acts with drug abuse cases has been discussed pedantically. From social and spatial points of view, this paper aims to determine the hot spot areas of burglary cases in the Northeast Penang Island District and Kuching District. The gained results of burglary cases are then being correlated with the presence of drug abuse cases. Both study areas came with location coordinates of the incident based on police stations boundaries and police station sector boundaries from the year 2015. The type of analysis used for this research is Optimized Hot Spot Analysis. Results for burglary cases of both areas are divided into two (2) which are daytime and nighttime. The spatial analysis revealed that there are five (5) sectors identified as hot spots for the Northeast Penang Island District which involve Jelutong Police Station boundary and Ayer Itam Police Station boundary, while none of the areas identified as hot spot areas in Kuching District.

scholarly journals SUITABILITY ANALYSIS OF FLOATING CAGE CULTURE OF GROUPER FISH USING GIS IN RINGGUNG WATERS OF LAMPUNG

2017 ◽  
Vol 9 (1) ◽  
pp. 151-159
Author(s):  
Indah Febry Hastari ◽  
Rahmat Kurnia ◽  
M. Mukhlis Kamal
Keyword(s):  
Water Quality ◽  
Spatial Analysis ◽  
Dissolved Oxygen ◽  
Current Velocity ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Water Transparency ◽  
Suitability Analysis ◽  
Cage Culture ◽  
Velocity Water

The study aims to determine suitability of floating cage (KJA) culture of grouper fish in Ringgung waters of Lampung. Data were analysed using GIS for spatial analysis at five stations.  There were 10 water quality parameters measured, such as bathimetry, current velocity, water transparency, temperature, salinity, pH, dissolved oxygen, nitrate, ammonia, and phosphate. Three suitability criteria, i.e very suitable, suitable, and not suitable were used to determine the suitability of floating cage culture of grouper fish. The results show that from 99.168,5 ha of the total area used for floating cage culture of grouper fish, about 85,94% covering 8522,16 ha were classified as very suitable, 5,64% covering 559,69 ha classified as suitable, and  8,42% covering 835 ha classified as not suitable.                                     Keywords : grouper culture, suitability, Ringgung waters, Lampung Province, GIS

scholarly journals IDENTIFIKASI POTENSI KESESUAIAN PERAIRAN UNTUK BUDIDAYA RUMPUT LAUT DI TELUK MULUT SERIBU, ROTE NDAO, NUSA TENGGARA TIMUR

2018 ◽  
Vol 13 (2) ◽  
pp. 99
Author(s):  
Ariani Andayani ◽  
Amin Pamungkas
Keyword(s):  
Water Quality ◽  
Spatial Analysis ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Ex Situ ◽  
Seaweed Cultivation ◽  
Seaweed Aquaculture ◽  
Weighted Arithmetic ◽  
Culture Cycle ◽  
A Site

Rumput laut merupakan salah satu komoditas unggulan sektor perikanan. Salah satu sentra budidaya rumput laut yang akan dikembangkan adalah Kabupaten Rote Ndao, yang memiliki ketersediaan perairan potensial untuk pengembangan budidaya rumput laut. Kajian kesesuaian perairan untuk budidaya rumput laut perlu dilakukan untuk keberlanjutan budidaya. Penelitian ini bertujuan untuk mengkaji karakteristik dan kesesuain perairan untuk pengembangan budidaya rumput laut di Teluk Mulut Seribu, Rote Ndao. Pengambilan data kualitas perairan dilakukan dengan pengukuran langsung dan mengambil sampel untuk dianalisis di laboratorium. Distribusi spasial kualitas perairan di area kajian diinterpolasi menggunakan metode IDW dengan perangkat lunak ArcGIS. Ada 4 parameter yang diperhitungkan dalam analisis spasial, yaitu: kedalaman, kecepatan arus, kecerahan dan alur layar, yang ditumpangsusun tanpa pembobotan untuk mendapatkan peta kesesuaian. Sementara itu beberapa parameter lainnya tidak masuk dalam analisis spasial karena kisaran nilainya sudah sesuai untuk budidaya rumput laut. Hasil penelitian menunjukan bahwa kesesuaian lahan untuk budidaya rumput laut di perairan Mulut Seribu mencapai 56% atau 497,68 hektar dari 879,18 hektar area kajian. Area yang sesuai untuk budidaya rumput laut tersebut memiliki potensi panen hingga 50 ton per siklus.Seaweed is one of the leading commodities in fisheries sector. In Rote Ndao regency, plans to develop seaweed aquaculture centers have been advised considering the regency’s potential coastline areas for seaweed farms. However, a site suitability study is needed to determine if the area is suitable for seaweed aquaculture to ensure its long term sustainability. This study was aimed to examine the characteristics and suitability of Teluk Mulut Seribu waters in Rote Ndao for seaweed cultivation. Data collection on water quality parameters was done via in-situ measurement and samples were collected to be analysed ex-situ in the laboratory. The full extent of spatial distributions of water quality parameters was determined using IDW interpolation tool available in ArcGIS. The four parameters used in the spatial analysis, namely: depth, current velocity, brightness, and sea transportation line were overlaid using non-weighted arithmetic mean operation to create a final composite of suitability map. The other measured parameters were not included in the spatial analysis because the value ranges were considered suitable for seaweed cultivation. The results showed that 56% or 497.68 ha from 879.18 ha of seascape in Teluk Mulut Seribu are suitable for seaweed farming.This study recommends that these suitable areas can be used for seaweed aquaculture with a predicted harvest potential up to 50 ton per culture cycle.

scholarly journals SPATIAL DISTRIBUTION OF SURFACE SALINITY AND TEMPERATURE IN BREBES SEAWATER USING SPATIAL ANALYSIS TOOLS – INVERSE DISTANCE WEIGHTED : ITS EFFECTS ON THE OTHER WATER QUALITY PARAMETERS

GEOMATIKA ◽  
2017 ◽  
Vol 23 (1) ◽  
pp. 9
Author(s):  
Wisnu Arya Gemilang ◽  
Ulung Jantama Wisha
Keyword(s):  
Water Quality ◽  
Spatial Analysis ◽  
Ph Value ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Northern Coast ◽  
Inverse Distance Weighted ◽  
Purposive Sampling ◽  
Distance Weighted ◽  
Inverse Distance

<p class="judulabsIndo"><strong>ABSTRACT</strong></p><p class="abstrakindo">The coast of Brebes is an important area for fishing activities. Along the coast of Brebes, there are mangrove conservation areas which part of green belt development program of Java Northern Coast. The purpose of this study was to determine the influence of salinity and temperature to the water quality conditions by employing a spatial analysis method. The measurement of water quality conducted by employing <em>purposive sampling method</em>. The sampling data was taken in the same time of 1 tide condition which forecasted before. The data were analyzed statistically and spatially using <em>inverse distance weighted</em> analysis. Temperature values ranged from 29.4 to 31.8 °C, conductivity ranged from 3.53 – 4.71 S.m<sup>-1</sup> with, pH ranged from 8.04 to 8.52, DO ranged from 3.18 to 6.57 mg.L<sup>-1</sup>, salinity ranged between 22.9 – 32.8 ‰, the value of salinity, temperature, and water quality parameters showed that the distribution is not uniform. It is influenced by the physical dynamics of sea water, which has an severe impact on the environment changes. Salinity and temperature have an impact to conductivity and DO variability but they are not affect the pH value. DO and pH value is higher than the previous research in Brebes waters.</p><pre><strong>Keywords: </strong>brebes<strong>, </strong>coastal, spatial analysis, water quality</pre><p class="judulabsINgg"><strong> ABSTRAK</strong></p><p class="abstrakingg">Pesisir Brebes merupakan kawasan yang penting bagi aktivitas perikanan. Disepanjang pantai Brebes terdapat kawasan konservasi mangrove yang merupakan program pembangunan kawasan sabuk hijau Pantai Utara Jawa. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh salinitas dan temperature terhadap kondisi kualitas perairan dengan menggunakan analisis spasial. Pengukuran sampel air dilakukan dengan metode purposive sampling, pengambilan data berdasarkan peramalan pasang surut. Analisa data dilakukan secara statistic dan spasial dengan menggunakan analisa inverse distance weighted. Nilai suhu berkisar antara 29.8 – 31.8°C, konduktivitas berkisar antara 3.53 – 4.71 S.m<sup>-1</sup>, pH berkisar antara 8,52 – 8,04, DO berkisar antara 3.18 – 6.57 mg.L<sup>-1</sup>, salinitas berkisar antara 22.9 – 32.8 ‰. Nilai dari salinitas, temperature dan parameter kualitas perairan menunjukkan bahwa sebaran konsentrasinya tidak merata yang dipengaruhi oleh dinamika fisis air laut dan keberadaan sungai-sungai utama yang berdampak pada perubahan lingkungan. Salinitas dan temperature memiliki dampak terhadap variasi konduktivitas dan DO, namun tidak terlalu berpengaruh terhadap nilai pH. DO dan pH mengalami peningkatan konsentrasi bila dibandingkan dengan penelitian sebelumnya di perairan Brebes.</p><p><strong><em>Kata Kunci:</em></strong><em> analisis spasial, brebes, kualitas air, pesisir, pencemaran </em></p>

Investigation of Some Water Quality Parameters of Pond Water under Mymensingh Municipality

2015 ◽  
Vol 8 (1) ◽  
pp. 85-89
Author(s):  
F Zannat ◽  
MA Ali ◽  
MA Sattar
Keyword(s):  
Water Quality ◽  
Water Samples ◽  
Chemical Properties ◽  
Pond Water ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Urban Region ◽  
Mn Toxicity ◽  
Ph Values ◽  
Drinking Water Standard

A study was conducted to evaluate the water quality parameters of pond water at Mymensingh Urban region. The water samples were collected from 30 ponds located at Mymensingh Urban Region during August to October 2010. The chemical analyses of water samples included pH, EC, Na, K, Ca, S, Mn and As were done by standard methods. The chemical properties in pond water were found pH 6.68 to 7.14, EC 227 to 700 ?Scm-1, Na 15.57 to 36.00 ppm, K 3.83 to 16.16 ppm, Ca 2.01 to 7.29 ppm, S 1.61 to 4.67 ppm, Mn 0.33 to 0.684 ppm and As 0.0011 to 0.0059 ppm. The pH values of water samples revealed that water samples were acidic to slightly alkaline in nature. The EC value revealed that water samples were medium salinity except one sample and also good for irrigation. According to drinking water standard Mn toxicity was detected in pond water. Considering Na, Ca and S ions pond water was safe for irrigation and aquaculture. In case of K ion, all the samples were suitable for irrigation but unsuitable for aquaculture.J. Environ. Sci. & Natural Resources, 8(1): 85-89 2015

Assessement of Water Quality Parameters in Some Potential Pollutant Areas from Romania

2018 ◽  
Vol 69 (8) ◽  
pp. 2045-2049
Author(s):  
Catalina Gabriela Gheorghe ◽  
Andreea Bondarev ◽  
Ion Onutu
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Quality Data ◽  
Chemical Parameters ◽  
Water Quality Data ◽  
Pollutant Sources ◽  
Water Quality Forecasting

Monitoring of environmental factors allows the achievement of some important objectives regarding water quality, forecasting, warning and intervention. The aim of this paper is to investigate water quality parameters in some potential pollutant sources from northern, southern and east-southern areas of Romania. Surface water quality data for some selected chemical parameters were collected and analyzed at different points from March to May 2017.

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