scholarly journals Determination of toxicity assays, trophic state index, and physicochemical parameters on Piracicaba River and Itapeva Stream

2015 ◽  
Vol 10 (2) ◽  
Author(s):  
Nádia Hortense Torres ◽  
Larissa De Assunção Rodrigues ◽  
Valdemar Luiz Tornisielo ◽  
Luiz Fernando Romanholo Ferreira ◽  
Lucineide Aparecida Maranho
Keyword(s):  
Physicochemical Parameters ◽  
Trophic State ◽  
Trophic State Index ◽  
State Index ◽  
Piracicaba River

scholarly journals Zooplanktonic community of six reservoirs in northeast Brazil

2009 ◽  
Vol 69 (1) ◽  
pp. 57-65 ◽  
Author(s):  
VLS. Almeida ◽  
ÊW. Dantas ◽  
M. Melo-Júnior ◽  
MC. Bittencourt-Oliveira ◽  
AN. Moura
Keyword(s):  
Trophic State ◽  
Zooplankton Community ◽  
Trophic State Index ◽  
Northeast Brazil ◽  
Composition And Structure ◽  
State Index ◽  
Abiotic Variables ◽  
Quantitative Importance

The aim of the present study was to investigate the zooplankton community at six reservoirs in the state of Pernambuco (Brazil). Zooplankton assemblages were identified using current literature and quantitatively analysed under a microscope and stereomicroscope. Concurrently to the sampling of zooplanktonic and phytoplanktonic communities, in situ measurements of abiotic variables, such as water temperature, dissolved oxygen and pH, were determined using field probes and transparency was determined with a Secchi disk. Total phosphorus concentrations were used for the determination of the Trophic State Index. The reservoirs were classified between eutrophic and hypertrophic, oxygenated, with pH varying from slightly acid to alkaline, high temperatures and low water transparency. A total of 27 zooplankton taxa were identified. Phytoplankton was represented by Cyanophyta, Chlorophyta, Baccilariophyta and phytoflagellates. The highest richness of species was observed for Rotifera (17), followed by Crustacea (8), Protozoa (1) and Insecta (1). Rotifers shared quantitative importance with Crustacea, which were mainly represented by juvenile forms. Jazigo Reservoir presented the highest diversity and equitability. Lowest diversity and equitability were recorded at the Poço da Cruz and Mundaú reservoirs, respectively. Dissimilarity was detected between the environments studied regarding zooplankton composition and structure.

scholarly journals ANALISIS TROPHIC STATE INDEX CARLSON AIR MUARA SUNGAI BANJIR KANAL TIMUR, SEMARANG

2018 ◽  
Vol 6 (1) ◽  
pp. 17-25
Author(s):  
Andro Khasani ◽  
Norma Afiati ◽  
Bambang Sulardiono
Keyword(s):  
Water Quality ◽  
Trophic State ◽  
Trophic State Index ◽  
Total N ◽  
Water Quality Status ◽  
State Index ◽  
The Republic ◽  
The City ◽  
Quality Status

ABSTRAKSungai Banjir Kanal Timur merupakan salah satu sungai besar yang dimiliki Kota Semarang. Sungai ini berfungsi dalam sistem drainase dan pengendalian banjir. Beberapa aliran sungai mengalir ke Sungai Banjir Kanal Timur dan berakhir di muara. Muara merupakan segmen yang akan menampung semua beban yang berasal dari sungai. Oleh karena itu, status trofik perairan di muara, khususnya Sungai Banjir Kanal Timur perlu dievaluasi dalam rangka pengelolaan lingkungan dan pemanfaatan sumberdaya alamnya. Penelitian ini dilaksanakan selama bulan Mei 2016 di muara Sungai Banjir Kanal Timur Semarang. Tujuan penelitian adalah untuk mengetahui kualitas air melalui status kesuburan perairan di muara Sungai Banjir Kanal Timur, berdasarkan metode Trophic State Index (Carlson, 1977) dan metode STORET dalam Kepmen LH No. 115 Tahun 2003 tentang Pedoman Penentuan Status Mutu Air dan PP RI No. 82 Tahun 2001 tentang Pengelolaan Kualitas Air dan Pengendalian Pencemaran Air. Variabel utama yang digunakan pada Analisis TSI Carlson adalah kandungan total N, total P, klorofil-a, dan kecerahan air (angka Secchi disk). Metode penelitian menggunakan metode deskriptif dengan penentuan lokasi sampling bersifat purposive sampling. Hasil yang diperoleh dari analisis TSI (Carlson, 1977) berkisar 53 – 57. Kriteria TSI menunjukkan bahwa TSI TP < TSI SD > TSI CHL dan TSI TP > TSI SD > TSI CHL. Pendugaan interpretasi hubungan tersebut menjelaskan bahwa fosfor membatasi biomasa alga (rasio TN/TP lebih besar dari 33:1), dan nilai TSI Chl yang rendah disebabkan beberapa faktor lain selain fosfor seperti, pemangsaan oleh zooplankton, kandungan nitrogen, dan sebagainya yang sifatnya mengurangi biomasa algae. Di sisi lain, analisis (Indeks STORET) menggunakan Kepmen LH No. 115 Tahun 2003 tentang Pedoman Penentuan Status Mutu Air menghasilkan skor, yaitu -8. Berdasarkan hasil penelitian dapat disimpulkan bahwa kesuburan perairan muara Sungai Banjir Kanal Timur, Semarang menurut TSI (Carlson 1977) berada pada status eutrofik ringan atau (Indeks STORET, Kepmen LH No. 115 / 2003) termasuk kategori perairan tercemar ringan. Kata Kunci : Status Mutu Perairan, Trophic State Index Carlson (1977),  Kepmen  LH No. 115 Tahun 2003, muara Sungai Banjir Kanal Timur Semarang. ABSTRACTEast Banjir Kanal River is one of the largest river owned by the city of Semarang. The river has a main function as drainage system and flood control of the city. Several streams flowing into the East Banjir Kanal River and end at the estuary. As estuary accommodates all loads from the river, therefore, the trophic status of waters in particular for East Banjir Kanal River needs to be evaluated in the context of environmental management and utilization of natural resources. This work was conducted during May 2016 in the estuary of East Banjir Kanal River. The objective was to determine river water quality using Trophic State Index by Carlson (1977) and the STORET method in the Decree of the Minister of Environment of The Republic of Indonesia (Kepmen LH) No. 115/2003 regarding Guideline for the Determination of Water Quality Status and The Government Regulation of The Republic of Indonesia No 81/2001 regarding Water Quality Management and Water Pollution Control. The main variables used in the analysis of Trophic State Index by Carlson, 1977 are total N, total P, chlorophyll-a and water clarity. Descriptive method is used to determine random sampling points. The average results of all stations analysed by means of Trophic State Index (Carlson, 1977) ranged from 53-57. The interpretation showed that TSI TP < TSI SD > TSI CHL and TSI TP > TSI SD > TSI CHL, these mean that phosphorus limit the biomass of algae (the ratio TN/TP larger than 33:1). Furthermore, lower TSI Chl values in all sampling point were due to several factors other than phosphorus, such as predatory zooplankton, nitrogen which worked to reduce algal biomass. The STORET analysis in the Decree of the Minister of Environment of The Republic of Indonesia (Kepmen LH) No. 115/2003 about Guideline for the Determination of Water Quality Status gives an overall score of  minus 8. It is concluded that by applying both methods, the estuary of the East Banjir Kanal, Semarang during the course of the study were on light eutrophic status and categorized as lightly polluted waters. Keywords:  Water Quality Status, Trophic State Index Carlson (1977), Decree of the Minister of Environment of The Republic Indonesia (Kepmen LH) No. 115/2003, Estuary of East Banjir Kanal River Semarang. 

scholarly journals Structure of the phytoplankton in a water supply system in the State of Pernambuco - Brazil

2007 ◽  
Vol 50 (4) ◽  
pp. 645-654 ◽  
Author(s):  
Ariadne do Nascimento Moura ◽  
Ênio Wocyli Dantas ◽  
Maria do Carmo Bittencourt-Oliveira
Keyword(s):  
Water Supply ◽  
Attenuation Coefficient ◽  
Trophic State ◽  
Phytoplankton Community ◽  
Light Attenuation ◽  
Supply System ◽  
Trophic State Index ◽  
Photic Zone ◽  
State Index

The aim of this work was to study the phytoplankton community composition at limnetic environment in Pernambuco, Brazil. Samplings were carried out from April/2001 to March/2002. Samples to analyses the biotic variables were taken using a recipient with a large overture, at the subsurface and with a Van Dorn bottle at the bottom. The rainfall data were recorded and the water transparency was used to calculate the light attenuation coefficient, photic zone and the determination of trophic state index. The concentrations of total phosphorus and total nitrogen were determined in a typical dry and rainy month. Equitability, also the, similarity and diversity indexes and the densities and correlation of total densities among depths were calculated. Forty-five taxa were identified in Chlorophyta (21spp), Cyanophyta (17spp) and Bacillariophyta (7spp), while flagellates were quantified in groups without identification. Cyanophyta presented highest diversity at both the depths and Planktothrix agardhii was the highest density species. Significant differences were not observed between subsurface and bottom densities. Results showed that the reservoir was eutrophicated and presented high densities of Cyanophyta.

APLIKASI CITRA LANDSAT 8 OLI UNTUK IDENTIFIKASI STATUS TROFIK WADUK GAJAH MUNGKUR WONOGIRI, JAWA TENGAH

2017 ◽  
Vol 19 (2) ◽  
pp. 113
Author(s):  
Kusuma Wardani Laksitaningrum ◽  
Wirastuti Widyatmanti
Keyword(s):  
Chlorophyll A ◽  
Total Phosphorus ◽  
Trophic State ◽  
Water Clarity ◽  
Coefficient Of Determination ◽  
Physical Factors ◽  
Landsat 8 ◽  
Trophic State Index ◽  
Landsat 8 Oli ◽  
State Index

<p align="center"><strong>ABSTRAK</strong></p><p class="abstrak">Waduk Gajah Mungkur (WGM) adalah bendungan buatan yang memiliki luas genangan maksimum 8800 ha, terletak di Desa Pokoh Kidul, Kecamatan Wonogiri, Kabupaten Wonogiri. Kondisi perairan WGM dipengaruhi oleh faktor klimatologis, fisik, dan aktivitas manusia yang dapat menyumbang nutrisi sehingga mempengaruhi status trofiknya. Tujuan dari penelitian ini adalah mengkaji kemampuan citra Landsat 8 OLI untuk memperoleh parameter-parameter yang digunakan untuk menilai status trofik, menentukan dan memetakan status trofik yang diperoleh dari citra Landsat 8 OLI, dan mengevaluasi hasil pemetaan dan manfaat citra penginderaan jauh untuk identifikasi status trofik WGM. Identifikasi status trofik dilakukan berdasarkan metode <em>Trophic State Index</em> (TSI) Carlson (1997) menggunakan tiga parameter yaitu kejernihan air, total fosfor, dan klorofil-a. Model yang diperoleh berdasar pada rumus empiris dari hasil uji regresi antara pengukuran di lapangan dan nilai piksel di citra Landsat 8 OLI. Model dipilih berdasarkan nilai koefisien determinasi (R<sup>2</sup>) tertinggi. Hasil penelitian merepresentasikan bahwa nilai R<sup>2</sup> kejernihan air sebesar 0,813, total fosfor sebesar 0,268, dan klorofil-a sebesar 0,584. Apabila nilai R<sup>2 </sup>mendekati 1, maka semakin baik model regresi dapat menjelaskan suatu parameter status trofik. Berdasarkan hasil kalkulasi diperoleh distribusi yang terdiri dari kelas eutrofik ringan, eutrofik sedang, dan eutrofik berat yaitu pada rentang nilai indeks 50,051 – 80,180. Distribusi terbesar adalah eutrofik sedang. Hal tersebut menunjukkan tingkat kesuburan perairan yang tinggi dan dapat membahayakan makhluk hidup lain.</p><p><strong>Kata kunci: </strong>Waduk Gajah Mungkur, citra Landsat 8 OLI, regresi, TSI, status trofik</p><p class="judulABS"><strong>ABSTRACT</strong></p><p class="Abstrakeng">Gajah Mungkur Reservoir is an artificial dam that has a maximum inundated areas of 8800 ha, located in Pokoh Kidul Village, Wonogiri Regency. The reservoir’s water conditions are affected by climatological and physical factors, as well as human activities that can contribute to nutrients that affect its trophic state. This study aimed to assess the Landsat 8 OLI capabilities to obtain parameters that are used to determine its trophic state, identifying and mapping the trophic state based on parameters derived from Landsat 8 OLI, and evaluating the results of the mapping and the benefits of remote sensing imagery for identification of its trophic state. Identification of trophic state is based on Trophic State Index (TSI) Carlson (1997), which uses three parameters there are water clarity, total phosphorus, and chlorophyll-a. The model is based on an empirical formula of regression between measurements in the field and the pixel values in Landsat 8 OLI. Model is selected on the highest value towards coefficient of determination (R<sup>2</sup>). The results represented that R<sup>2</sup> of water clarity is 0.813, total phosphorus is 0.268, and chlorophyll-a is 0.584. If R<sup>2</sup> close to 1, regression model will describe the parameters of the trophic state better. Based on the calculation the distribution consists of mild eutrophic, moderate eutrophic, and heavy eutrophic that has index values from 50.051 to 80.18. The most distribution is moderate eutrophication, and it showed the high level of trophic state and may harm other living beings.</p><p><strong><em>Keywords: </em></strong><em>Gajah Mungkur Reservoir, </em><em>L</em><em>andsat 8 OLI satellite imagery, regression, TSI, trophic state</em></p>

scholarly journals Assessment of Trophic Responses of a Reservoir to Seasonal and Annual Variations in Monsoon

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2117
Author(s):  
Su-mi Kim ◽  
Hyun-su Kim
Keyword(s):  
Water Quality ◽  
Trophic State ◽  
Monsoon Season ◽  
Phytoplankton Growth ◽  
Phosphorus Loading ◽  
Nutrient Concentrations ◽  
Trophic State Index ◽  
Post Monsoon ◽  
Post Monsoon Season ◽  
State Index

The variations in water quality parameters and trophic status of a multipurpose reservoir in response to changing intensity of monsoon rain was investigated by applying a trophic state index deviation (TSID) analysis and an empirical regression model to the data collected in two periods from 2014 to 2017. The reservoir in general maintained mesotrophic conditions, and Carlson’s trophic state index (TSIc) was affected most by TSITP. Nutrient concentrations, particularly phosphorus, did not show strong correlations with precipitation, particularly in the period with weak monsoon, and a significant increase in total phosphorus (TP) was observed in Spring 2015, indicating the possibility of internal phosphorus loading under decreased depth and stability of water body due to a lack of precipitation. TSIChl was higher than TSISD in most data in period 1 when a negligible increase in precipitation was observed in the monsoon season while a significant fraction in period 2 showed the opposite trend. Phytoplankton growth was not limited by nutrient limitation although nutrient ratios (N/P) of most samples were significantly higher than 20, indicating phosphorus-limited condition. TSID and regression analysis indicated that phytoplankton growth was limited by zooplankton grazing in the Spring, and that cell concentrations and community structure in the monsoon and post-monsoon season were controlled by the changing intensity of the monsoon, as evidenced by the positive and negative relationships between community size and cyanobacterial population with the amount of precipitation in the Summer, respectively. The possibility of contribution from internal loading and an increase in cyanobacterial population associated with weak monsoon, in addition to potential for nutrient enrichment in the post-monsoon season, implies a need for the application of more stringent water quality management in the reservoir that can handle all potential scenarios of eutrophication.

scholarly journals Remote Estimation of Trophic State Index for Inland Waters Using Landsat-8 OLI Imagery

2021 ◽  
Vol 13 (10) ◽  
pp. 1988
Author(s):  
Minqi Hu ◽  
Ronghua Ma ◽  
Zhigang Cao ◽  
Junfeng Xiong ◽  
Kun Xue
Keyword(s):  
Yangtze River ◽  
Trophic State ◽  
Inland Waters ◽  
Landsat 8 ◽  
Trophic State Index ◽  
Type I ◽  
Water Type ◽  
Type Ii ◽  
Turbid Water ◽  
State Index

Remote monitoring of trophic state for inland waters is a hotspot of water quality studies worldwide. However, the complex optical properties of inland waters limit the potential of algorithms. This research aims to develop an algorithm to estimate the trophic state in inland waters. First, the turbid water index was applied for the determination of optical water types on each pixel, and water bodies are divided into two categories: algae-dominated water (Type I) and turbid water (Type II). The algal biomass index (ABI) was then established based on water classification to derive the trophic state index (TSI) proposed by Carlson (1977). The results showed a considerable precision in Type I water (R2 = 0.62, N = 282) and Type II water (R2 = 0.57, N = 132). The ABI-derived TSI outperformed several band-ratio algorithms and a machine learning method (RMSE = 4.08, MRE = 5.46%, MAE = 3.14, NSE = 0.64). Such a model was employed to generate the trophic state index of 146 lakes (> 10 km2) in eastern China from 2013 to 2020 using Landsat-8 surface reflectance data. The number of hypertrophic and oligotrophic lakes decreased from 45.89% to 21.92% and 4.11% to 1.37%, respectively, while the number of mesotrophic and eutrophic lakes increased from 12.33% to 23.97% and 37.67% to 52.74%. The annual mean TSI for the lakes in the lower reaches of the Yangtze River basin was higher than that in the middle reaches of the Yangtze River and Huai River basin. The retrieval algorithm illustrated the applicability to other sensors with an overall accuracy of 83.27% for moderate-resolution imaging spectroradiometer (MODIS) and 82.92% for Sentinel-3 OLCI sensor, demonstrating the potential for high-frequency observation and large-scale simulation capability. Our study can provide an effective trophic state assessment and support inland water management.

Sign in / Sign up

Export Citation Format

Share Document