Development of spatial similarity-based modelling to improve integrated lake water quality management in Malaysia

2018 ◽  
Vol 23 (1) ◽  
pp. 24-33
Author(s):  
Bashirah Fazli ◽  
Aziz Shafie ◽  
Azuhan Mohamed ◽  
Mohd F. Mohamad ◽  
Nasehir K. E. M. Yahaya ◽  
...  
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Lake Water ◽  
Water Quality Management ◽  
Lake Water Quality ◽  
Spatial Similarity

scholarly journals Assessment of Lake Water Quality and Eutrophication Risk in an Agricultural Irrigation Area: A Case Study of the Chagan Lake in Northeast China

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2380 ◽  
Author(s):  
Xuemei Liu ◽  
Guangxin Zhang ◽  
Guangzhi Sun ◽  
Yao Wu ◽  
Yueqing Chen
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Lake Water ◽  
Northeast China ◽  
Water Quality Management ◽  
Chemical Properties ◽  
Principal Component ◽  
Trophic State Index ◽  
Lake Water Quality ◽  
Chagan Lake

Water quality safety is the key factor to maintain the ecosystem service functions of lakes. Field investigations and statistical analyses were carried out to study the water quality of a large, agriculture-stressed lakes (e.g., Chagan Lake) in Northeast China. The hydro-chemical properties of the Chagan Lake are HCO3·CO3-Na. Nutrient (N and P) and non-nutrient (pH and F−) were found to be the major factors that threaten water quality safety of the lake. The concentration of total nitrogen (TN) and total phosphorus (TP) was found to vary seasonally and at different locations. The overall lake water had mean TN and TP values of 2.19 mg/L and 0.49 mg/L, respectively, in summer. TN was the major factor for water quality deterioration in the western region of the lake, while TP was the principal factor in the other regions, as determined by a principal component analysis (PCA). Fluoride (F−) concentration in the lake water were related to the values of total dissolved solid (TDS), pH, and electrical conductivity (EC). In addition, eutrophication is a fundamental index that has been affecting the ecological evaluation of water quality. The results showed that trophic level index (TLI), trophic state index (TSI), and eutrophication index (EI) were evaluated to quantify the risk of eutrophication. However, TLI and TSI can better describe the purification effect of the wetland. These indices showed that the lake water was hyper-eutrophic in summer, with TLI, TSI, and EI values of 60.1, 63.0, and 66.6, respectively. Disparities in water quality were observed among whole areas of the lake. Overall, this study revealed that controlling agriculture drainage is crucial for lake water quality management. The study generated critical data for making water quality management plans to control the risk.

A WIND–PHYTOPLANKTON MODEL FOR LAKE WATER QUALITY MANAGEMENT

1986 ◽  
Vol 2 (1) ◽  
pp. 220-224 ◽  
Author(s):  
Sally L. Marquis ◽  
Brian W. Mar ◽  
Eugene B. Welch
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Lake Water ◽  
Water Quality Management ◽  
Lake Water Quality

scholarly journals Economic Instruments for Lake Water Quality Management in Japan.

1997 ◽  
Vol 25 ◽  
pp. 623-628 ◽  
Author(s):  
Thomas Ballatore ◽  
Masahisa Nakamura ◽  
Tomonori Matsuo
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Lake Water ◽  
Water Quality Management ◽  
Economic Instruments ◽  
Lake Water Quality

scholarly journals Modelling Water Quality Improvements in a South Korean Inter-Basin Water Transfer System

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3173
Author(s):  
Hye Won Lee ◽  
Bo-Min Yeom ◽  
Jung Hyun Choi
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Constructed Wetlands ◽  
Management Practices ◽  
Water Quality Management ◽  
Quality Data ◽  
Watershed Model ◽  
Selective Withdrawal ◽  
Lake Water Quality ◽  
Water Quality Data

In this study, we investigated the feasibility of using constructed wetlands for non-point source pollution reduction. The effect of constructed wetlands in reducing suspended solids (SS) was analyzed using an integrated modeling system of watershed model (HSPF), reservoir model (CE-QUAL-W2), and stream model (EFDC) to investigate the behavior and accumulation of the pollution sources based on 2017 water quality data. The constructed wetlands significantly reduced the SS concentration by approximately 30%, and the other in-lake management practices (e.g., artificial floating islands and sedimentation basins) contributed an additional decrease of approximately 7%. Selective withdrawal decreased in the average SS concentration in the influents by ~10%; however, the effluents passing through the constructed wetlands showed only a slight difference of 1.9% in the average SS concentration. In order to meet the water quality standards, it was necessary to combine the constructed wetlands, in-lake water quality management, and selective withdrawal practices. Hence, it was determined that the model proposed herein is useful for estimating the quantitative effects of water quality management practices such as constructed wetlands, which provided practical guidelines for the application of further water quality management policies.

scholarly journals Water quality management for aquaculture at Lake Tutud, North Sulawesi

2016 ◽  
Vol 4 (2) ◽  
pp. 130
Author(s):  
Suzanne L. Undap ◽  
Reiny A. Tumbol
Keyword(s):  
Water Quality ◽  
Quality Management ◽  
Community Service ◽  
Science And Technology ◽  
Water Quality Management ◽  
Fish Farming ◽  
Fish Feed ◽  
Lake Water Quality ◽  
Feeding Method ◽  
Service Activity

Southeast Minahasa Regency has potential natural resources, one of them related aquculture in Lake Tutud. Considering the conditions and opportunities for the development of aquaculture in Lake Tutud, improvement efforts and increase the potential for fish production needs to be done. Some of the factors that caused the current problems include declining water level of Lake Tutud drastically in recent years caused by the death of most of spring water coming into the lake causing sedimentation, high content of sulfur from the irrigation run off. All of these problems can be a barrier to tilapia fish culture, so it is necessary to periodically measure the water quality in Lake Tutud in order to improve and enhance the quality of the water before it is used for culture efforts. Referring to the current economic conditions of the community around Lake Tutud of Tombatu 3 Village include community leaders and the fish farmers are also public observers who are interested in this program, through the Program Implementation of science and technology for the Community (IbM) of PNBP UNSRAT given counseling, training and mentoring such as water quality management technology. The methods used in the implementation of science and technology program are education, training, discussion and mentoring. Materials used were proper method of producing fish seeds, the stages of the production process, the use immunostimulatory in fish feed for fish disease management, maintain and improve water quality. With the Community Service Program through the application of science and technology, it is expected that there will be a transferred in science and technology in water quality management of Tutud lake so hopefully their business development, creation of business opportunity, income generation and welfare of the people in this Tombatu 3 village. The results revealed that the implementation of this community service activity in the form of the application of science and technology are: lecture activities, training, discussion and question and answer, including the lake water quality measurements that have been going well with good response of the fish farmers indicated by the presence of participants as much as 80%, show that a). increased production of tilapia fish farmers through water quality management can be implemented, b). tilapia fish farming is feasible and can provide profit if done properly, so it can be an alternative in an effort to help the reduction of unemployment and poverty. Interaction with the community on this community service activity, it is found that there were many people who still do not understand much about the overall material included engineering, water quality management and proper fish feed and feeding method. One of the barriers was the language, so it is necessary for the lectures and trainers to use the local language. It can be recommended in the future to keep on doing this kind of community service considering the inherent of the knowledge and application of water quality management is still a new thing and has a business prospective opportunities in the Tombatu 3 village. Keywords: water quality, community, management. Abstrak Kabupaten Minahasa Tenggara mempunyai potensi sumber daya alam yang banyak salah satunya yang berkaitan dengan bidang Perikanan budi daya air tawar adalah Danau Tutud. Memperhatikan kondisi dan peluang pengembangan pembudidayaan ikan di Danau Tutud maka upaya perbaikan dan peningkatan potensi produksi ikan perlu dilakukan. Budi daya ikan khususnya di Danau Tutud adalah pembudidayaan pembesaran ikan nila di Keramba Jaring Tanjap (KJT). Dalam usaha pengembangan budi daya ikan air tawar harus diimbangi dengan pengelolaan kualitas air danau dan penanganan penyakit ikan yang baik. Oleh sebab itu aspek-aspek yang menjadi factor pembatas dalam hal peningkatan produksi perlu dicari jalan keluarnya yang baik. Beberapa faktor yang menjadi masalah yang dihadapi saat ini antara lain adalah menyusutnya secara drastis permukaan air Danau Tutud dalam beberapa tahun belakangan ini akibat dari matinya sebagian besar mata air yang masuk ke danau sehingga mengalami sedimentasi, selain itu kandungan sulfur atau belerang cukup tinggi dari air irigasi yang berasal dari danau yang mana akan dapat menjadi hambatan usaha pembenihan ikan nila, sehinggan diperlukan adanya pengukuran kualitas air Danau Tutud untuk dapat memperbaiki dan meningkatkan kualitas air sebelum dipergunakan untuk usaha budi daya. Mengacu pada kondisi tersebut maka untuk masyarakat sekitar Danau Tutud di Desa Tombatu 3 antara lain para tokoh masyarakat dan para pembudidaya ikan juga masyarakat pemerhati yang tertarik pada program ini, melalui Program Penerapan Ipteks bagi Masyarakat (IbM) dari PNBP UNSRAT diberikan penyuluhan, pelatihan dan pendampingan berupa teknologi pengelolaan kualitas air. Metode yang digunakan dalam Program Penerapan Ipteks ini adalah penyuluhan, pelatihan, diskusi dan pendampingan. Materi kegiatan pengabdian penerapan Ipteks ini meliputi cara memproduksi benih ikan yang benar dan baik, tahapan-tahapan proses produksi pakan ikan yang diberi imunostimulan untuk penanganan penyakit ikan, tahapan tahapan untuk memelihara dan meningkatkan kualitas air. Dengan Program Pengabdian Kepada Masyarakat melalui penerapan Ipteks ini diharapkan dapat ditransfer ilmu dan teknologi pengelolaan kualitas air Danau Tutud sehingga diharapkan adanya pengembangan usaha, penciptaan peluang berusaha, peningkatan pendapatan dan kesejahteraan masyarakat di Desa Tombatu 3 ini. Hasil pelaksanaan kegiatan pengabdian kepada masyarakat dalam bentuk penerapan ipteks ini adalah: kegiatan ceramah, pelatihan, diskusi dan tanya jawab, termasuk dengan pengukuran kualitas air Danau Tutud telah berjalan dengan baik respon kehadiran peserta sebanyak 80%. Dari hasil pelatihan, diskusi tanya jawab dan prakek dilapangan menunjukkan bahwa a). peningkatan produksi pembudidaya ikan nila melalui pengelolaan kualitas air ini dapat dilaksanakan, b). pembudidayaan ikan nila ini layak dan dapat memberikan profit bila dilaksanakan dengan baik dan benar, sehingga dapat menjadi alternatif lapangan usaha baru untuk membantu program pengentasan penggangguran dan penanggulangan kemiskinan. Dari hasil interaksi dengan masyarakat pada kegiatan pengabdian ini diketahui bahwa banyak masyarakat yang masih belum banyak mengerti tentang keseluruhan materi termasuk pada materi teknik dan proses pengelolaan kualitas air dan pakan ikan yang baik dan benar, salah satu kendala adalah bahasa, sehingga perlu ceramah dan pelatihan yang menggunakan bahasa setempat. Untuk selanjutnya dapat direkomendasikan agar terus digalakkan dan dilakukan pembinaan yang melekat mengingat pengetahuan dan penerapan pengelolaan kualitas air ini masih merupakan hal yang baru dan merupakan peluang usaha yang prospektif di Desa Tombatu 3. Keywords: Kualitas Perairan, Komunitas, Manajemen.

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