scholarly journals Management Options to Improve Water Quality in Lake Peipsi: Insights from Large Scale Models and Remote Sensing

2018 ◽  
Vol 34 (7) ◽  
pp. 2241-2254 ◽  
Author(s):  
Gabriel Fink ◽  
Sophia Burke ◽  
Stefan G. H. Simis ◽  
Külli Kangur ◽  
Tiit Kutser ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Water Quality ◽  
Large Scale ◽  
Lake Peipsi ◽  
Management Options ◽  
Scale Models ◽  
Improve Water Quality

scholarly journals Automatic calibration of a large-scale sediment model using suspended sediment concentration, water quality, and remote sensing data

RBRH ◽  
2019 ◽  
Vol 24 ◽  
Author(s):  
Hugo de Oliveira Fagundes ◽  
Fernando Mainardi Fan ◽  
Rodrigo Cauduro Dias de Paiva
Keyword(s):  
Remote Sensing ◽  
Water Quality ◽  
Suspended Sediment ◽  
Large Scale ◽  
Suspended Sediment Concentration ◽  
Remote Sensing Data ◽  
Sediment Concentration ◽  
Spatial Discretization ◽  
Calibration And Validation ◽  
Sediment Model

ABSTRACT Calibration and validation are two important steps in the application of sediment models requiring observed data. This study aims to investigate the potential use of suspended sediment concentration (SSC), water quality and remote sensing data to calibrate and validate a large-scale sediment model. Observed data from across 108 stations located in the Doce River basin was used for the period between 1997-2010. Ten calibration and validation experiments using the MOCOM-UA optimization algorithm coupled with the MGB-SED model were carried out, which, over the same period of time, resulted in 37 calibration and 111 validation tests. The experiments were performed by modifying metrics, spatial discretization, observed data and parameters of the MOCOM-UA algorithm. Results generally demonstrated that the values of correlation presented slight variations and were superior in the calibration step. Additionally, increasing spatial discretization or establishing a background concentration for the model allowed for improved results. In a station with high quantity of SSC data, calibration improved the ENS coefficient from -0.44 to 0.44. The experiments showed that the spectral surface reflectance, total suspended solids and turbidity data have the potential to enhance the performance of sediment models.

scholarly journals PENEBARAN IKAN BANDENG DI WADUK JATILUHUR: Analisis Dampak dan Kebijakan Pengembangan

2020 ◽  
Vol 1 (1) ◽  
pp. 1 ◽  
Author(s):  
Sonny Koeshendrajana ◽  
Tenny Apriliani ◽  
Maulana Firdaus ◽  
Zahri Nasution ◽  
Amula Nurfiarin
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Population Dynamic ◽  
Economic Conditions ◽  
Fish Stock ◽  
Management Options ◽  
Aquatic Resources ◽  
Improve Water Quality ◽  
The Impact ◽  
Research Show

Penebaran ikan bandeng merupakan salah satu opsi pengelolaan yang dilakukan untuk memperbaiki kualitas perairan yang semakin menurun di Waduk Jatiluhur. Penebaran ikan bandeng ke perairan waduk Jatiluhur secara sistematis telah dilakukan sejak tahun 2008, namun demikian, manfaat yang dapat dirasakan belum banyak mendapat perhatian. Penelitian bertujuan untuk mengevaluasi secara sosial ekonomi dampak penebaran ikan bandeng di perairan Waduk Jatiluhur sebagai basis pengembangan di masa mendatang telah dilakukan. Penelitian di lapang menunjukkan bahwa penebaran bandeng memberikan dampak bagi kualitas sumberdaya perairan serta kondisi sosial ekonomi masyarakat. Berdasarkan pertimbangan-pertimbangan tersebut maka beberapa rumusan kebijakan yang perlu ditindak lanjuti adalah: (i) mengkaji dampak penebaran ikan bandeng terhadap pertumbuhan ikan budidaya dalam karamba; (ii) melakukan ujicoba penebaran dengan jenis ikan lainnya yang mampu bereproduksi secara alamiah di perairan waduk dan tidak menganggu kestabilan dinamika populasi ikan; (iii) penguatan kelembagaan penebaran ikan, serta; (iv) melakukan sosialisasi lebih intensif mengenai perlunya kesadaran masyarakat untuk menjaga kelestarian sumber daya perairan.Title: Introducing Milkfish in the Jatiluhur Reservoir: Analysis of Impacts and Policies Development.Introducing milkfish is considered one of management options to improve water quality in the Jatiluhur reservoir. This activity has been systematically carried out since 2008; however, tangible benefits from this activity are less coverage. This research aimed to evaluate socio-economic impacts of milkfish stocking in the Jatiluhur reservoir that can be used as a basis for future fisheries development in this reservoir. Results of this research show that milkfish-stocking in the Jatiluhur reservoir contributed to the improvement of its aquatic resources environment and socio-economic conditions of the society. Based on these findings, several policies recommendation should be followed up and implemented, namely (i) immediately assess the impact of milkfish stocking to the growth of fish cultured in the cage; (ii) stocking different fish species that enable to reproduce naturally in the reservoir waters without disturbing population dynamic of fish stock; (iii) strengthening institution of the fish stocking program, and (iv) intensify dissemination and people awareness to conserve aquatic resources.

Monitoring land use change in the Lake Taupo catchment between 1975, 1990 and 2002 using satellite remote sensing data

2007 ◽  
pp. 17-22
Author(s):  
H. Lilienthal ◽  
A. Brauer ◽  
K. Betteridge ◽  
E. Schnug
Keyword(s):  
Remote Sensing ◽  
Water Quality ◽  
Land Use ◽  
Land Use Change ◽  
Satellite Remote Sensing ◽  
Remote Sensing Data ◽  
Native Vegetation ◽  
Lake Water Quality ◽  
Livestock Farming ◽  
Slow Decline

Conversion of native vegetation into farmed grassland in the Lake Taupo catchment commenced in the late 1950s. The lake's iconic value is being threatened by the slow decline in lake water quality that has become apparent since the 1970s. Keywords: satellite remote sensing, nitrate leaching, land use change, livestock farming, land management

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