scholarly journals Benthic macroinvertebrates as bioindicators of water quality in Billings Reservoir fishing sites (SP, Brazil)

2016 ◽  
Vol 28 (0) ◽  
Author(s):  
José Ricardo Baroldi Ciqueto Gargiulo ◽  
Cacilda Thais Janson Mercante ◽  
Ana Lucia Brandimarte ◽  
Luciana Carvalho Bezerra de Menezes
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Environmental Conditions ◽  
Benthic Community ◽  
Diversity Index ◽  
Metropolitan Region ◽  
Total Density ◽  
Artisanal Fishing ◽  
Fishing Activity ◽  
Temperature Conductivity

Abastract: Aim The Billings Reservoir is the largest reservoir in the metropolitan region of São Paulo and has multiple uses, including artisanal fishing. Its surroundings present intense occupation, resulting in various environmental impacts. Although the water is degraded, affecting the composition and quality of the fish, this reservoir supports artisanal fishermen who survive through this activity. This study aimed to analyze the water quality in the main sites of artisanal fishing activity, with an emphasis on the benthic community as a bioindicator. Methods Three sampling sites were selected, in which water and zoobenthos samples were collected monthly from April 2012 to March 2013. Water analyses consisted of the determination of pH, temperature, conductivity, turbidity, total dissolved solids, dissolved oxygen, total nitrogen, total phosphorus, and trophic state as well as a principal components analysis. The zoobenthos analysis consisted of determining the relative abundance and total density of taxa, the Shannon-Weaver diversity index, taxa richness, uniformity, Simpson’s dominance index, and the benthic community index and conducting a canonical correspondence analysis. The non-parametric Kruskal-Wallis test followed by the Student-Newman-Keuls test were used to investigate the existence of significant differences in the abiotic and biotic variables among the sites. Results The studied sites showed a high degree of eutrophication, with nitrogen and phosphorus totals levels above the limits defined by current Brazilian legislation. Taquacetuba (P1) showed the best environmental conditions for the development of fishing activity, with the presence of sensitive organisms (Polymitarcyidae) and higher levels of dissolved oxygen. Alvarenga (P2) had the worst water quality, with a predominance of tolerant organisms (Oligochaeta) and lower levels of dissolved oxygen. Conclusion In conclusion, the benthic community in association with abiotic metrics proved to be a useful tool as a bioindicator of environmental conditions, indicating that fishing activity at Alvarenga is not recommended due to the degradation of water quality.

scholarly journals Economic evaluation of the impacts of water quality on fishery production in the Estuary Complex of Santos, São Vicente and Bertioga cities, in southeastern coast of Brazil

2020 ◽  
Vol 56 (1) ◽  
pp. 99-110
Author(s):  
Victor Carrozza Barcellini ◽  
Ângela Tavares Paes ◽  
Simone Georges El Khouri Miraglia
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Total Phosphorus ◽  
Linear Models ◽  
Quality Parameters ◽  
Sao Paulo ◽  
Water Quality Parameters ◽  
São Paulo ◽  
Fishing Activity ◽  
Monetary Loss

The present study proposes a diagnosis of water quality and fishery production in the Estuarine Complex of Santos, São Vicente, and Bertioga Cities as a requirement for economic valuation of water pollution impacts on fishing production. In the study period (2009–2014), three water quality parameters were identified (dissolved oxygen, total phosphorus, and nitrate), which occurred more frequently in non-conformity with Brazilian water standards, according to reports released by the Environmental Company of São Paulo State (Companhia Ambiental do Estado de São Paulo — CETESB). For data collection of fishery production, data from the monitoring of Institute of Fisheries of Santos City (Instituto de Pesca de Santos) were used, and 15 species were identified with higher occurrence in the study area. The relation between water quality parameters and fishery production was analyzed with mixed linear models, in which significant values for dissolved oxygen parameters, total phosphorus (positive relation), and nitrate (negative relation) were found. Environmental valuation considered only the direct use values (DUV) component of the valuation of fishery production variation in relation to water quality variation. For this purpose, the Marginal Productivity Method (MPM) of the dose-response function was used, which resulted in a range of monetary loss between US$ 24,760,550.22 and US$ 60,635,978.78. The obtained values represent only a portion of the valuation of economic and environmental loss in the fishing activity (part of DUV). Therefore, economic value calculated is conservative, and although it did not reached the total amount corresponding to all the impacts caused by poor water quality, given the limitations of methods and study period, the obtained values represent the minimum environmental monetary loss.

scholarly journals Características de um Rio Cárstico na Bacia do São Francisco (Characteristics of a Cárstico River in the São Francisco Basin)

2017 ◽  
Vol 10 (5) ◽  
pp. 1576
Author(s):  
José Henrique Izidoro Apezteguia Martinez
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
River Basin ◽  
High Sensitivity ◽  
Minas Gerais ◽  
Annual Rainfall ◽  
Flow Temperature ◽  
Temperature Conductivity ◽  
Western State ◽  
The Mean

Este trabalho teve como objeto de estudo o Córrego do Barreado localizado na mesorregião do oeste do estado de Minas Gerais, que tem sua bacia contida na região da bacia do Alto São Francisco sobre relevo cárstico. A Bacia do São Francisco abastece 14,2 milhões de habitantes em 6 estados, sendo assim importante o conhecimento de suas características limnológicas. Para se avaliar as águas do Córrego do Barreado foi efetuado um monitoramento hidrológico mensal de um ano, entre outubro de 2014 e setembro de 2015, os parâmetros avaliados foram: precipitação, vazão, temperatura, condutividade, oxigênio dissolvido, pH, turbidez, nitrito, nitrato, ortofosfato e amônia. O acumulado de chuva anual entre outubro de 2014 e setembro de 2015 foi 1464,8 mm, as médias de cada parâmetro para todo o Córrego do Barreado foram respectivamente: oxigênio dissolvido (OD) – 2,83 mg/l, pH – 7,25, turbidez – 53,6, nitrito – 0,03 mg/l de NO2, nitrato – 0,14 mg/l de NO3, ortofosfato – 0,05 mg/l de P, amônia – 0,16 mg/l NH3. Conclui se que a combinação da impropriedade da qualidade das águas, ocupação do solo e alta sensibilidade dos aquíferos cársticos amplificam efeitos poluidores no Córrego do Barreado, que alteram suas características com efeito percebido principalmente nos valores de oxigênio dissolvido.Palavras-chave: água, relevo cárstico, monitoramento hidrológico, usos da água.A B S T R A C TThis study object was the Córrego do Barreado located in the mesoregion of the western state of Minas Gerais, which has its basin inserted in the region of the Upper São Francisco basin on karst relief. The São Francisco River Basin supplies 14.2 million inhabitants in 6 states, so it is important to know its limnological characteristics. The following parameters were evaluated: rainfall, flow, temperature, conductivity, dissolved oxygen, pH, turbidity, nitrite, precipitation, precipitation, nitrate, orthophosphate and ammonia. The annual rainfall accumulated between October 2014 and September 2015 was 1464.8 mm, the mean of each parameter for the entire Barreado Stream were: OD - 2.83 mg / l, pH - 7.25, turbidity - 53.6, nitrite – 0.03 mg/l de NO2, nitrate - 0.14 mg/l de NO3, orthophosphate - 0.05 mg/l de P, ammonia - 0.16 0,16 mg/l NH3. It is concluded that the combination of water quality improperness, soil occupation and high sensitivity of the karstic aquifers amplify polluting effects in the Barreado Stream, which alter their characteristics with a perceived effect mainly on the values of dissolved oxygen.Keywords: water, carstic relief, hidrologic monitoring, warer uses. 

Changes in physicochemical, heavy metals and air quality in life episode of Aplocheilus panchax along Mahanadi industrial belt of India as a function of social lockdowns

2020 ◽  
Author(s):  
Biswaranjan Paital ◽  
Pawan Agrawal
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Air Quality ◽  
Dissolved Oxygen ◽  
Environmental Audit ◽  
Temperature Conductivity ◽  
Mahanadi River ◽  
Positive Effects ◽  
Environmental Status ◽  
First Time

Abstract The COVID-19 induced lockdowns have many positive effects on the environment. However, a preplanned experiment explaining the impacts of such lockdowns on environmental markers and appearance of fish species is lacking. We hypothesize that spotting the fish Aplocheilus panchax along the industrial belt of Mahanadi River near Cuttack in a never seen manner could be due to the regenerated environment. Heavy metals, water quality and air qualities along with spotting A. panchax in up, mid and down stations in Mahanadi River at Jagatpur industrial basins were analysed at pre-lockdown (end of March 2020) and after 60 days of lockdown (last week of May 2020). Here we show that an overall reduction of 45, 61, 79, 100, 97 and 90% of Fe, Cu, Ni, Cd, Pb and Zn, respectively, was recorded in the studied area after lockdowns. Similarly, dissolved oxygen and pH was elevated by 26 and 7%, respectively. Water temperature, conductivity and total dissolved solute levels were reduced by 7, 46 and 15%, respectively. Air NO2, SO2, NH3, PM2.5, PM10 and CO levels were alleviated by 58.75, 80.33, 72.22, 76.28, 77.33 and 80.15%, respectively. Finally, for the first time we documented about 12 numbers of the A. panchax per 100 m shore line in the area. The observed lockdown induced environmental healing at the studied area could contribute to this and therefore a stringent environmental audit is suggested during post-COVID-19 periods to make the regenerated environmental status long lasting at several places of the planet.

scholarly journals Succession of phytoplankton in a shallow lake under the alternating influence of runoff and reverse water transfer

2020 ◽  
Vol 51 (5) ◽  
pp. 1077-1090
Author(s):  
Qing Li ◽  
Guoqiang Wang ◽  
Zhongxin Tan ◽  
Hongqi Wang
Keyword(s):  
Water Quality ◽  
Phytoplankton Community ◽  
Diversity Index ◽  
Oxygen Demand ◽  
Aquatic Organisms ◽  
Water Transfer ◽  
Water Diversion ◽  
Clear Understanding ◽  
Total Density ◽  
The Impact

Abstract Both runoff and water diversion can interfere with the physical and chemical environment of a lake and affect aquatic organisms. In this study, previously obtained data were used to analyze the phytoplankton community, water quality, water level, and temperature in Dongping Lake (DPH) before, during, and after the water diversion caused by the South-to-North Water Transfer Project. The results showed that the total density and diversity index of phytoplankton decreased in the water transfer period, and was related to low temperature. Temperature also affected the recovery of phytoplankton community structure when the water transfer period ended. In a water transfer cycle, changes in dominant genera were more drastic than that of a whole phytoplankton community, and dominant genera were sensitive to total phosphorus (TP) and total nitrogen (TN) changes. Water transfer alleviated the deterioration of water quality in DPH, but water transfer process increased the risk of water pollution. Runoff from Dawen River carried TN, TP, and chemical oxygen demand (COD) into DPH in the rainy season, which indirectly affected phytoplankton, while it also carried phytoplankton directly into DPH. Overall, these findings provide a clear understanding of the impact of water transfer projects on ecology in shallow lakes.

scholarly journals Hubungan parameter fisika-kimia perairan dengan kelimpahan plankton di Samudera Hindia bagian Barat Daya

DEPIK ◽  
2016 ◽  
Vol 5 (2) ◽  
Author(s):  
Rani Novia ◽  
Adnan . ◽  
Irwan Ramadhan Ritonga
Keyword(s):  
Water Quality ◽  
Indian Ocean ◽  
Dissolved Oxygen ◽  
Water Samples ◽  
Diversity Index ◽  
Quality Parameters ◽  
Descriptive Research ◽  
Bivariate Correlation ◽  
Quantitative Descriptive ◽  
Temperature Depth

Abstract. The aims of this research was to examine the water quality parameters and plankton abundance and its relationships in the Southwestern of Indian Ocean. This is a quantitative descriptive research. Planktons were sampled using plankton net, and water samples were taken using Conductivity, Temperature, Depth (CTD) where the water samples colleted in the Nansen Bottle No. 1 (surface water) at seven sampling stations. The results showed that there were 25 species of planktons belonging into seven classes, i.e., Bacillariophyceae, Ciliate, Crustacea, Cyanobacteria, Dinophyceae, Flagellata, and Maxillopoda. The highest value of abundance of plankton was found at station 6 with 7255 ind. L-1, the value of diversity index of plankton was at moderate category,  and there was no predominant species was occurred in the community. Bivariate correlation analysis results of Person's showed that the temperature and Dissolved Oxygen (DO) were positively correlated to the plankton abudance, while pH, conductivity, TDS, salinity were negatively correlated with abundances of plankton.Keywords: Abundance of plankton, linkages, water quality, Indian Ocean of Southwestern Abstrak. Penelitian ini bertujuan untuk mengetahui jenis dan kelimpahan plankton dan kualitas air serta hubungan antara kelimpahan plankton dengan parameter fisika-kimia perairan di Samudera Hindia bagian Barat Daya. Penelitian ini merupakan penelitian deskriptif kuantitatif, pengambilan sampel plankton menggunakan plankton net, dan sampel air menggunakan CTD (Conductivity, Temperature Depth) dimana sampel air yang diambil pada botol nansen No. 1 (sampel air permukaan) pada 7 titik stasiun. Hasil penelitian ditemukan 25 spesies plankton yang termasuk ke dalam 7 kelas, yaitu Bacillariophyceae, Ciliata, Crustacea, Cyanobacteria, Dinophyceae, Flagellata, dan Maxillopoda. Kelimpahan plankton tertinggi terdapat pada  stasiun 6 dengan 7255 ind/L, indeks keragaman plankton pada kondisi sedang, dan tidak terjadi dominasi spesies dalam komunitas. Hasil analisis korelasi Bivariate Person’s menunjukkan suhu dan DO (Dissolved Oxygen) berkorelasi positif terhadap kelimpahan plankton, sedangkan pH, konduktifitas, TDS, salinitas berkorelasi negative dengan kelimpahan plankton. Kata kunci: Kelimpahan Plankton, Keterkaitan, Kualitas air, Samudera Hindia bagian Barat Daya

scholarly journals Development and use of the Wetland Fish Index to assess the quality of coastal wetlands in the Laurentian Great Lakes

2006 ◽  
Vol 63 (2) ◽  
pp. 354-366 ◽  
Author(s):  
T S Seilheimer ◽  
P Chow-Fraser
Keyword(s):  
Water Quality ◽  
Great Lakes ◽  
Diversity Index ◽  
Environmental Data ◽  
Laurentian Great Lakes ◽  
Green Bay ◽  
Temperature Conductivity ◽  
Wiener Diversity Index ◽  
Fish Index

We use fish and environmental data from 40 wetlands of the Laurentian Great Lakes to develop the Wetland Fish Index (WFI), a tool that can be used to assess the quality of coastal marshes. A partial canonical correspondence analysis was used to ordinate fish species along multidimensional environmental axes that accounted for anthropogenic disturbance based on temperature, conductivity, and the presence of pollutants (e.g., suspended solids and primary nutrients). Compared with other measures of fish habitat quality (e.g., Shannon–Wiener diversity index and species richness), the WFI was the only index that was significantly related to the degree of water quality degradation and wetlands condition, as indicated by an independent index of wetland quality, the Water Quality Index (WQI). WQI ranks sites according to deterioration in water quality and is statistically related to the degree of land-use alteration in wetland watersheds. We demonstrate the usefulness of the WFI for detecting intrawetland variation between two sites in a degraded urban wetland, Frenchman's Bay, Lake Ontario, and to distinguish the heavily impacted wetlands in lower Green Bay from the less-impacted marshes in middle and upper Green Bay, Lake Michigan. This was accomplished by using only published fish data without corresponding environmental variables.

scholarly journals Design and Development of Corrosion Resistance Coating for Pipes in Fire Protection Sprinkler Systems : A Review

2021 ◽  
pp. 87-104
Author(s):  
Jitendra Jangid
Keyword(s):  
Water Quality ◽  
Corrosion Resistance ◽  
Dissolved Oxygen ◽  
Fire Protection ◽  
Environmental Conditions ◽  
Fire Event ◽  
Sprinkler Systems ◽  
The Right ◽  
In Fire ◽  
Fire Sprinkler

Fire pumping systems are often used in most buildings for firefighting, whether they are residential, commercial, industrial or of any other kind. Such systems are responsible for the water flow and pressure necessary for manual or automatic devices designed to build safety. Therefore, ensuring their availability when an unexpected fire event occurs is very critical. But due to the presence of dissolved oxygen in the water-filled in the pipes, corrosion takes place at some point in time. This will lead to several types of failures in the system if the system is not properly designed with the right material for the environmental conditions and water quality, which in turn will render the system ineffective. This paper discusses the reasons for corrosion in the piping of fire sprinkler systems and their mitigation.

scholarly journals The Aquatic Insect Communities of Universiti Malaysia Sabah (UMS), Sabah, Malaysia

2015 ◽  
Vol 3 (1) ◽  
pp. 1-5
Author(s):  
Arman Hadi Mohmad ◽  
Mohd Shafiq Izzat Shafie ◽  
Andrew Wong Bak Hui ◽  
Sahana Harun
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Diversity Index ◽  
Aquatic Insect ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Insect Communities ◽  
Pearson’S Correlation ◽  
Insect Abundance ◽  
Pearson's Correlation

A s tudy was conducted to investigate the aquatic insect communities in Universiti Malaysia Sabah (UMS), Sabah, Malaysia. Two sampling sites were selected: lakes at School of Science and Technology (SST), and another near College E (CE) (student accommodation). Each lake consisted of four sampling stations. Aquatic insects were sampled using dip net from November 2013 to January 2014. Four water quality parameters were measured at each station. Shannon-Weiner’s diversity index and biotic indices (BMWP) were used in this study. Student’s t-test was used for testing the significant difference of water quality parameters, Shannon-Weiner’s diversity index and BMWP between these lakes. Pearson’s correlation was used to investigate relationships between aquatic insect assemblage and water quality parameters. A total of 1987 individuals composed of five orders that representing eleven families were recorded in this study. Baetidae (56.67%) was the dominant family in UMS, where Diptera order had least abundant with only 0.4% of overall sample. Aquatic insect abundance were significantly higher (P<0.05) in CE Lake. Bray-Curtis Similarity index showed 53.75% similarity between these two lakes. Pearson’s correlation showed that aquatic insect abundance and richness had significant relationships with water temperature, dissolved oxygen, salinity and pH (P<0.05 or 0.01), except for salinity with taxa richness. Based on Malaysia’s INWQS, water quality parameters of these two lakes were categorized as Class I, but with dissolved oxygen the CE and SST lakes were classified as Class IIA and III respectively. The BMWP index showed similar results as dissolved oxygen, where SST Lake (score=40) had poor water quality.

scholarly journals Komposisi dan Kelimpahan Ophiuroidea dan Echinoidea di Perairan Pantai Pok Tunggal, Gunung Kidul, Yogyakarta

2020 ◽  
Vol 9 (2) ◽  
pp. 109-118
Author(s):  
Herlina Lestari Pakpahan ◽  
Irwani Irwani ◽  
Ita Widowati
Keyword(s):  
Water Quality ◽  
Community Structure ◽  
Data Analysis ◽  
Coral Reefs ◽  
Environmental Conditions ◽  
Diversity Index ◽  
Species Abundance ◽  
Temperature Data ◽  
Dominance Index ◽  
Index Value

ABSTRAK: Echinodermata merupakan salah satu komponen penting dalam keaneka ragaman fauna di ekosistem pantai. Habitat utama echinodermata adalah terumbu karang, hal ini karena terumbu karang berperan sebagai tempat berlindung dan mencari makan bagi fauna echinodermata. Salah satu penyebaran biota ini adalah di perairan rataan terumbu karang pantai selatan di pantai Pok Tunggal, Gunung Kidul, Yogyakarta. Tujuan penelitian ini adalah untuk mengetahui jenis dan struktur komunitas echinodermata di pantai Pok Tunggal,  kabupaten Gunung Kidul, Yogyakarta. Penelitian ini dilaksanakan pada bulan Juli 2019 di pantai Pok Tunggal. Metode pengambilan data kelimpahan menggunakan metode transek kuadrat berukuran 1x1 m, parameter kualitas perairan yang diukur adalah salinitas, DO, pH, serta suhu. Analisis  data meliputi identifikasi spesies, kelimpahan jenis (ind/m2), indeks keanekaragaman, indeks keseragaman dan indeks dominansi. Hasil pengamatan ditemukan beberapa spesies, dari 2 kelas filum echinodermata, antara lain 2 species dari kelas Ophiuroidea yaitu Ophiocoma erinaceus dan Ophiocoma dentata, 3 species dari kelas Echinoidea yaitu Echinometra oblonga, Echinometra mathei dan Echinothrix diadema. Hasil penelitian menunjukkan kelimpahan individu tertinggi adalah Echinometra oblonga (16,6 ind/m2) dan terendah adalah Echinothrix diadema (0,4 ind/m2). Parameter lingkungan perairan di pantai Pok Tunggal pada setiap stasiun masih menunjang kehidupan Echinodermata. Struktur komunitas echinodermata yaitu nilai indeks keanekaragaman (H‟) berkisar antara 0,667-1,198, nilai indeks keseragaman (E) berkisar antara 0,744 - 0,999 dan nilai indeks dominansi (C) berkisar berkisar 0,308 - 0,525. ABSTRACT: Echinoderms are one of important component of fauna diversity in coastal ecosystems. The main habitat of Echinoderms is coral reefs, because coral reefs act as a shelter and food for echinoderms fauna. This species distributed in the flat waters of the coral reefs of the south coast at Pok Tunggal beach, Gunung Kidul, Yogyakarta. The aim of this study was to determine the species and Community Structure of echinoderms on the Pok Tunggal beach, Gunung Kidul Regency, Yogyakarta. This research was conducted in July 2018 at Pok Tunggal Beach. Sampling was done by using transect quadrant measuring 1x1 m. Parameter of water quality was salinity, DO, pH, and temperature. Data analysis includes species abundance (ind/m2), diversity index, uniformity index and dominance index. The result showed that several species of Echinodermal phylum classes, including 2 species of Ophiuroidea class namely Ophiocoma erinaceus and Ophiocoma dentata, 3 species of Echinoidea class namely Echinometra oblonga, Echinometra mathei and Echinothrix diadema. The highest individual abundance was Echinometra oblonga (16,6 ind/m2) and the lowest was Echinothrix diadema (0,4 ind/m2). The environmental conditions of the waters at the Pok Tunggal beach at each station can support the life of echinoderms. Echinoderms community structure, namely diversity index (H ') ranges from 0,667-1,198, uniformity index (E) ranges from 0,744-0,999 and dominance index value ranges (C) ranges from 0,308-0,525.

scholarly journals KEANEKARAGAMAN MOLLUSCA SEBAGAI BIOINDIKATOR KUALITAS PERAIRAN DI KAWASAN TPA KEBON KONGOK LOMBOK BARAT

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Athifah Athifah ◽  
Maya Nuansa Putri ◽  
Sahid Imam Wahyudi ◽  
Immy Suci Rohyani
Keyword(s):  
Water Quality ◽  
Key Words ◽  
Environmental Conditions ◽  
Sampling Method ◽  
Diversity Index ◽  
Residential Area ◽  
Purposive Sampling ◽  
Main River ◽  
The Difference ◽  
Tarebia Granifera

Abstract: Research has been done in the area of Kebon Kongok landfill by looking at the diversity of Mollusca as a bioindicator of water quality. This research is important because the river in Kebon Kongok landfill area is utilized by the surrounding community for daily needs. The research was conducted in May-June 2018 at Sungai Ayu River, Gerung District, West Lombok which aims to provide information about the water quality in this area. The research was done by purposive sampling method using cruising technique. There are 3 research stations selected based on the difference of environmental conditions around the waters of  Kebon Kongok landfill. Station 1 is located east of the Kebon Kongok landfill adjacent to the landfill waste pond landfill, station 2 is located in the northwest part of the Kebon Kongok landfill where it is located adjacent to the main river body and station 3 is located in the southwest adjacent to the residential area. There were 13 Mollusca species belonging to 8 families: Lymnaeidae, Ampullaroidae, Thiaridae, Viviparidae, Planorbidae, Ariophantidae, Neritidae and Corbiculidae. The Tarebia granifera of the Thiaridae family is the most common of 127, 92 and 47 in each station. There were Shannon-Wiener (H ') diversity index data where H' each station was 1.3, 1.5 and 1.4 respectively. This data concludes that the water quality around the Kebon Kongok landfill is moderately polluted with moderate diversity criteria (H '= 1.0-2.0). Key words: Kebon Kongok landfill, Indeks Shannon-Wienner, Mollusca, and Bioindicator. Abstrak: Telah dilakukan penelitian di kawasan TPA Kebon Kongok dengan melihat keanekaragaman Mollusca sebagai bioindikator kualitas perairan. Penelitian ini penting dilakukan mengingat sungai di kawasan TPA Kebon Kongok dimanfaatkan oleh masyarakat sekitar untuk kebutuhan sehari-hari. Penelitian telah dilakukan pada bulan Mei-Juni 2018 di sungai Taman Ayu Kecamatan Gerung,  Lombok Barat yang bertujuan untuk memberikan informasi mengenai kualitas perairan di kawasan tersebut. Penelitian dilakukan dengan metode purposive sampling menggunakan teknik jelajah. Ada 3 stasiun penelitian yang dipilih berdasarkan perbedaan kondisi lingkungan di sekitar perairan TPA Kebon Kongok. Stasiun 1 terletak di sebelah timur TPA Kebon Kongok yang bersampingan dengan kolam limbah lindi TPA, stasiun 2 terdapat di bagian barat laut TPA Kebon Kongok dimana letaknya berdekatan dengan badan sungai utama dan stasiun 3 terletak di sebelah barat daya yang berdampingan dengan pemukiman penduduk. Ditemukan 13 spesies Mollusca yang tergabung dalam 8 famili yakni  Lymnaeidae, Ampullaroidae, Thiaridae, Viviparidae, Planorbidae, Ariophantidae, Neritidae dan Corbiculidae. Tarebia granifera dari famili Thiaridae merupakan individu terbanyak yakni 127, 92 dan 47 di masing-masing stasiun. Didapatkan data indeks keanekaragaman Shannon-Wiener (H’) dimana H’ setiap stasiun berturut-turut yakni 1.3, 1.5 dan 1.4. Data ini menyimpulkan bahwa kualitas perairan sekitar TPA Kebon Kongok adalah tercemar sedang dengan kriteria diversitas sedang (H’=1,0-2,0). Kata kunci: TPA Kebon Kongok, Indeks Shannon-Wienner, Mollusca, dan Bioindikator

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