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"Tingkat sedimentasi di danau rawapening cukup tinggi 778,93 ton / tahun , yang disebabkan oleh kondisi lingkungan di sekitar tangkapan. Penelitian ini bertujuan untuk mengetahui hubungan karakteristik spasial danau dengan kondisi lingkungan sekitarnya. Parameter yang diamati adalah Muatan padat tersuspensi di danau, erosi dari masing-masing daerah tangkapan, dan keluarnya setiap sungai. Muatan Padat Tersuspensi dipantau menggunakan penginderaan jauh 0,5-0,6?m panjang gelombang tahun 2017, debit sungai dihitung menggunakan metode Rasional, dan erosi ditentukan menggunakan metode Hazarika. Hasil penelitian menunjukkan debit sungai berbanding terbalik dengan muatan padatan tersuspensi, sedangkan besarnya erosi berkorelasi positif dengan muatan padatan tersuspensi.

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Sedimentation rate in rawapening lake is fairly high 778.93 tons year , which is caused by the environmental conditions surrounding the catchment. This study is aimed to determine the relation of spatial characteristics of the lake with surrounding environmental condition. The parameters observed were suspended solid load in the lake, erosion from each catchment area, and the discharge of each river suroundings. Suspended solid load was monitored using remote sensing 0.5 0.6 m wavelength of 2017, river discharge was calculated using Rational method, and erosion was determined using Hazarika method. The results show river discharge wasinversely proportional to suspended solid load, while the magnitude of erosion positively correlates with the suspended solid load. "

"Teluk Kendari merupakan salah satu kawasan yang berdekatan dengan pusat kegiatan masyarakat. Kondisi seperti ini akan menyebabkan terjadinya ancaman di sekitar teluk berupa sedimentasi. Sedimentasi yang tinggi pada perairan mengakibatkan meningkatnya konsentrasi total padatan tersuspensi yang berdampak pada terhambatnya penetrasi cahaya pada perairan akibat terhalang oleh partikel sedimen. Sebagai konsekuensinya, tingginya konsentrasi TSS dapat menurunkan tingkat fotosintesis dan akan menurunkan kandungan klorofil-a dalam perairan tersebut. Penelitian ini bertujuan untuk, menganalisis karakteristik sedimen (ukuran butir), menganalisis sebaran total padatan tersuspensi dan klorofil-a serta mensintesa hubungan antara total padatan tersuspensi dengan kandungan klorofil-a. Penelitian ini dilakukan pada bulan januari sampai maret 2018. Metode yang digunakan dalam penelitian ini adalah metode survey dengan mengumpulkan data primer berupa data karakteristik ukuran butir sedimen, konsentrasi total padatan tersuspensi dan kandungan klorofil-a, serta data skunder berupa TSS dan Klorofil-a pada tahun 2010, 2015 dan 2018 yang diambil dari citra satelit Landsat 5 TM dan Landsat 8 OLI. Hasil penelitian ini menunjukkan karakteristik sedimen dengan ukuran butir yang paling halus berada pada wilyah tengah teluk yang dimana pada wilayah itu merupakan wilayah dengan kandungan TSS tertinggi sedangkan yang lebih besar berada pada mulut teluk. Total spadatan tersuspensi berpengaruh terhadap kandungan klorofil-a perairan yang ditunjukkan dengan nilai koefisien determinasi (R2) sebesar 0.79 yang berarti sebesar 79% variable TSS mempengaruhi kandungan klorofil-a.

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Kendari Bay is one of areas adjacent to the center of community activities at Southeast Sulawesi. Such conditions will cause a threat around the bay in the form of sedimentation. High sedimentation in the waters resulted in increas of total suspended solid (TSS) concentration. As a light light penetration in the will be low. TSS usually consist of < 2 I¼m. High TSS concentrations can reduce photosynthesis levels and the chlorophyll-a content in waters. This study was aimed to analyse the sediment grain size, the distribution patterns of total suspended solids and chlorophyll-a and tosynthesize the correlations between total suspended solids and chlorophyll-a content. This research was conducted in January to March 2018. The method used in this study was the survey method by collecting primary data such as sediment grain size, total suspended solid concentration and chlorophyll-a content, and secondary data such as TSS and chlorophyll-a in 2010, 2015 and 2018 taken from the image Landsat 5 TM and Landsat 8 OLI satellites. The results of this study indicated that the characteristics of sediments with the finest grain size was in the middle of the bay while the larger ones were at the mouth of the bay which is the region with the highest TSS content. TSS affected the chlorophyll-a content of waters as shown by the coefficient of determination (R2) of 0.79 which means that 79% of the TSS variable affects the chlorophyll-a content."

"Kapasitas Dead Storage waduk pada suatu bendungan selama ini didesain berdasarkan nilai erosi lahan pada Daerah Tangkapan Air (DTA) waduk per tahun tanpa memperhitungkan perubahan tata guna lahan dan dinamika curah hujan pada DTA, serta tidak mempertimbangkan distribusi angkutan sedimen yang tersebar di dasar waduk. Pengembangan protokol prediksi sedimentasi waduk dibutuhkan untuk menghasilkan prediksi sedimentasi waduk yang lebih akurat sesuai dengan kondisi lapangan dan dapat mengakomodasi keterbatasan data hidrolik pada waduk-waduk yang ada di Indonesia. Implementasi dari pengembangan protokol prediksi sedimentasi waduk dapat memberikan perspektif yang lebih baik di bidang perencanaan, pengoperasian dan pemeliharaan waduk. Protokol ini terdiri dari prediksi erosi lahan jangka panjang, pemodelan debit angkutan sedimen jangka panjang, pemodelan angkutan sedimen waduk secara spasial dan temporal, dan prediksi sedimentasi waduk pada masa mendatang. Studi kasus pada penelitian ini adalah Waduk Wonogiri di Indonesia. Simulasi protokol ini dimulai dengan memprediksi erosi lahan tahunan di DTA Waduk Wonogiri untuk jangka waktu yang panjang dari tahun1993 sampai dengan 2019. Debit angkutan sedimen dimodelkan dari prediksi erosi lahan tahunan dan hidrograf yang dimodelkan menggunakan metode FJ Mock dan divalidasi dengan hasil pengukuran sedimen waduk di lapangan. Angkutan sedimen waduk dimodelkan secara spasial dan temporal menggunakan perangkat lunak MIKE. Simulasi ini menghasilkan volume sedimen waduk setiap satuan waktu, terindikasi dari perubahan elevasi dasar waduk, tervalidasi dengan batimetri di lapangan. Prediksi sedimentasi waduk di masa mendatang menggunakan metode regresi secara modular. Hasil prediksi sedimentasi waduk adalah volume sedimen sebesar 146 juta m³ untuk 50 tahun mendatang. Protokol ini memperkenalkan secara luas model matematis angkutan sedimen waduk secara spasial serta memprediksi volume dan sebaran sedimen di dasar waduk pada masa mendatang dengan menggunakan metode regresi secara modular yang hasilnya lebih akurat dari peneletian terdahulu.

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The dead storage capacity of a reservoir is usually designed based on the soil erosion rate of the catchment area for a certain year, without considering the land use and precipitation dynamics in the catchment, as well as sedimentation distribution analysis at the bottom of the reservoir. Development of a protocol is needed for a more accurate prediction of reservoir sediment transport to describe the real condition and accommodate data limitations. It will give a good perspective on reservoir design, operation, and maintenance strategy. The proposed protocol consists of long-term soil erosion prediction, modeling long-term sediment discharge, modeling spatial-temporal reservoir sediment transport, and predicting reservoir sediment volume and distribution in the future. The case study is in Wonogiri reservoir, Indonesia. Simulation of the proposed protocol in the case study began by obtaining long-term soil erosion prediction from 1993 – 2019. Sediment discharge was modeled from soil erosion and long-term hydrographs model using the FJ Mock method and validated with sediment rate measured directly in the field. The reservoir sediment transport model was using MIKE software. The simulation gives the volume and distribution of sedimentation validated by the bathymetry result of the reservoir. Prediction of future sedimentation was using the modular regression method. The prediction result of reservoir sediment volume in 2069 is 146.7 million m³. This protocol promotes spatial reservoir sediment transport model and sedimentation prediction by modular regression. The result is more accurate than previous studies."

"[ ABSTRAK Sedimentasi saat ini merupakan dampak dari permasalahan lingkungan yangdapat menyebabkan kerugian pada ekosistem, perikanan, dan saluran irigasi yangbiasa sering ditemui pada daerah agrikultur atau perkotaan. Sedimentasi dapat terjadisecara alamiah ataupun terjadi karena ulah manusia. Secara global, dilaporkan setiaptahun,jumlah volume permukaan tanah yang ter-erosi mencapai angka 60 milyarton,24 milyar ton diantaranya ditemukan di muara laut dan tercatat hamper 25 milyarton sedimentasi berasal dari daerah agrikultur. Melalui skripsi ini, penulis mencobamencari nilai sediment delivery ratio (SDR), yaitu perbandingan antara erosi yangterjadi dengan nilai potensialnya menggunakan metode Universal Soil Loss Equation(USLE). Pada skripsi ini, daerah yang menjadi fokus penelitian adalah daerah JatiKramat, yang merupakan daerah aliran sungai yang bisa menimbulkan masalahsedimentasi.

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ABSTRACT Sedimentation nowadays becomes an environment impact that harming the

ecosystem, fisheries, or irrigation that can be found in the agricultural land or urban

land use. The sedimentation can happened by the natural process and can be

accelerated by the human activities. From the global point of view, it is reported that

each year, erosion of surface soil from river basins amounts to 60 billion tons,

resulting in 24 billion tons of sediment flux to the oceans in the world and almost 25

billion tons of soil lost from agricultural land. Through this thesis, author try to find

the sediment delivery ratio (SDR) with comparing the sediment yield and erosion

potential estimated using Universal Soil Loss Equation (USLE) method. The focused

objected study area in this thesis is Jati Kramat watershed, which believes this

watershed has a settle water infrastructure that able to transport sediment due to

erosion potential.;Sedimentation nowadays becomes an environment impact that harming the

ecosystem, fisheries, or irrigation that can be found in the agricultural land or urban

land use. The sedimentation can happened by the natural process and can be

accelerated by the human activities. From the global point of view, it is reported that

each year, erosion of surface soil from river basins amounts to 60 billion tons,

resulting in 24 billion tons of sediment flux to the oceans in the world and almost 25

billion tons of soil lost from agricultural land. Through this thesis, author try to find

the sediment delivery ratio (SDR) with comparing the sediment yield and erosion

potential estimated using Universal Soil Loss Equation (USLE) method. The focused

objected study area in this thesis is Jati Kramat watershed, which believes this

watershed has a settle water infrastructure that able to transport sediment due to

erosion potential.;Sedimentation nowadays becomes an environment impact that harming the

ecosystem, fisheries, or irrigation that can be found in the agricultural land or urban

land use. The sedimentation can happened by the natural process and can be

accelerated by the human activities. From the global point of view, it is reported that

each year, erosion of surface soil from river basins amounts to 60 billion tons,

resulting in 24 billion tons of sediment flux to the oceans in the world and almost 25

billion tons of soil lost from agricultural land. Through this thesis, author try to find

the sediment delivery ratio (SDR) with comparing the sediment yield and erosion

potential estimated using Universal Soil Loss Equation (USLE) method. The focused

objected study area in this thesis is Jati Kramat watershed, which believes this

watershed has a settle water infrastructure that able to transport sediment due to

erosion potential., Sedimentation nowadays becomes an environment impact that harming the

ecosystem, fisheries, or irrigation that can be found in the agricultural land or urban

land use. The sedimentation can happened by the natural process and can be

accelerated by the human activities. From the global point of view, it is reported that

each year, erosion of surface soil from river basins amounts to 60 billion tons,

resulting in 24 billion tons of sediment flux to the oceans in the world and almost 25

billion tons of soil lost from agricultural land. Through this thesis, author try to find

the sediment delivery ratio (SDR) with comparing the sediment yield and erosion

potential estimated using Universal Soil Loss Equation (USLE) method. The focused

objected study area in this thesis is Jati Kramat watershed, which believes this

watershed has a settle water infrastructure that able to transport sediment due to

erosion potential.]"