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"An analysis done on the extreme ranfall characteristics for rainfall stations in the mud ponds area of Sidoarjo - East Java showed that stations between east and west area have different rain characteristics..."

"The Biology of Lakes and Ponds focuses on the interactions between the abiotic frame, such as turbulence, temperature, pH and nutrients, and the organisms, including interactions with and among organisms at the individual, population and community level. The book fills this niche between traditional limnology and evolutionary ecology by focusing on physiological, morphological and behavioural adaptations among organisms to abiotic and biotic factors and how interactions between biotic processes and abiotic constraints determine the structure and dynamics of lake and pond systems. In addition, the book describes and analyses the causes and consequences of human activities on freshwater organisms and ecosystems and covers longstanding environmental threats, such as eutrophication and acidification, as well as novel threats, such as biodiversity loss, use of everyday chemicals and global climate change. However, also signs of improvement and the possibilities to restore degraded ecosystems are discussed and provide hope for future generations."

"Waduk resapan Universitas Indonesia (UI) telah dibangun sejak 5 tahun yang lalu. Namun kegiatan monitoring dan evaluasinya sangatminim dilakukan. Tujuan dari studi ini adalah untuk mengetahui laju resapan, dan untuk mengevaluasi kondisi kuantitas dan kualitas air waduk resapan selama musim kemarau dan penghujan. Pengukuran kedalaman muka air, intensitas curah hujan dan penguapan dilakukan untuk menentukan ketersediaan air, laju resapan, dan imbangan air waduk. Sejumlah air permukaan diambil dari waduk resapan dan sungai di tiga titik sampling untuk mengetahui kondisi kualitas air eksisting. Hasil studi menunjukkan tidak ada perbedaan yang signifikan antara laju resapan musim kemarau (3,2 mm/hari) dan musim penghujan (6,1 mm/hari). Imbangan air waduk resapan menunjukkan nilai yang berlimpah. Berbagai parameter fisik dan kimia air (kekeruhan, warna, TDS, pH, dan Cl) mempunyai konsentrasi di bawah standarbaku mutu. Temuan dari studi ini antara lain bahwa air permukaan waduk masih layak untuk diimbuhkan ke dalam lapisaquifer sehingga mendukung keberlanjutan gerakan konservasi air, dan ketersediaannya sangat berpotensi untuk dikembangkan sebagai sumber air baku tambahan bagi kebutuhan air domestik di lingkungan Kampus UI Depok.

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AbstractThe UI recharge pond has been constructed 5 years ago. However, monitoring and evaluation activities on its performances are very lack. Aims of this study are to understand the recharge rate, and to evaluate existing quantity and water quality of the pond during dry and rainy season. Measurement of water depth, rainfall intensity, and evaporation is conducted to determine water availability, recharge rate, and water balance of the recharge pond. Amount of surfacewater is collected from recharge pond and river at three sampling point to determine existing water quality of the pond. The results showed that recharge rate of the pond between dry season (3.2 mm/day) and wet season (6.1 mm/day) are considered as insignificant different. The water balance of the recharge pond shows an excessive rate. Various physics and chemical parameters (turbidity, color, TDS, pH, and Cl) are found to have concentration lower than the waterquality standard. The results suggest that the pond surface wateris remain suitable to be recharged into aquifer zone so that sustaining ground water conservation campaign, and it is potential to be utilized as an additional raw water source for domestic water demand of UI Campus Depok. "

"Saat ini wilayah pesisir Karimunjawa menghadapi tantangan berupa peningkatan tambak udang secara intensif. Masalah dalam penelitian ini adalah aktivitas tambak diduga berpotensi menimbulkan dampak pada wilayah pesisir. Pengolahan limbah yang ada tidak cukup baik sehingga menimbulkan kekhawatiran munculnya dampak pada wilayah pesisir. Tujuan penelitian adalah untuk mengetahui dampak pada wilayah pesisir dan menyusun strategi pengendalian tambak udang menggunakan bioindikator makrozoobenthos. Metode yang digunakan adalah metode campuran (mixed method). Hasil penelitian menunjukkan bahwa telah terjadi penurunan kualitas air terutama parameter TSS, nitrat dan fosfat. Indeks keanekaragaman genus makrozoobenthos di Karimunjawa termasuk kategori keanekaragaman sedang, yang menggambarkan kondisi perairan tercemar sedang. Dampak pada wilayah pesisir berupa penurunan populasi Tridacna, konversi ekosistem mangrove menjadi lahan tambak, terjadi konflik sosial/pro-kontra pada masyarakat dan masih sedikitnya pengunaan tenaga kerja lokal. Kesimpulan penelitian ini adalah strategi pengendalian tambak udang vaname menggunakan bioindikator makrozoobenthos yaitu pemantauan kualitas air budidaya tambak udang menggunakan Capitella sebagai bioindikator makrozoobenthos yang dilaksanakan oleh petambak, perbaikan performansi kinerja tambak dengan penebaran benur dan FCR yang sesuai standar serta perbaikan kualitas air tambak sehingga tercapai keberlanjutan tambak udang dan kelestarian wilayah pesisir.

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Currently, the coastal of Karimunjawa is facing challenges in the form of an intensive increase in shrimp ponds. The problem in this research is that pond activities are suspected to have the potential to impact coastal areas. The existing waste treatment is not good enough, giving rise to concerns about the impact on coastal areas. The aim of the research was to determine the impact on coastal areas and develop strategies for controlling shrimp ponds using macrozoobenthos bioindicators. The method used is a mixed method (mixed method). The results showed that there has been a decrease in water quality, especially in the TSS, nitrate and phosphate parameters. The diversity index of the macrozoobenthos genus in Karimunjawa is included in the moderate diversity category, which describes the condition of moderately polluted waters. The impact on coastal areas is in the form of a decrease in the Tridacna population, the conversion of mangrove ecosystems into ponds, social conflicts / pros and cons in the community and the use of local workers is still minimal. The conclusion of this study is the strategy for controlling vannamei shrimp ponds using macrozoobenthos bioindicators, namely monitoring the quality of shrimp pond aquaculture water using Capitella as a macrozoobenthos bioindicator carried out by farmers, improving pond performance by stocking fry and FCR according to standards and improving pond water quality so that pond sustainability is achieved. shrimp and sustainability of coastal areas."

"ABSTRACTSitu Rawa Kalong merupakan sumber air utama yang dimanfaatkan oleh masyarakat untuk pembudidayaan ikan air tawar. Namun, situ yang dimanfaatkan ini berada dalam kondisi yang tercemar. Penelitian ini bertujuan untuk mengkaji pengaruh penggunaan lahan terhadap pencemaran di situ ini dan bagaimana zona beban cemarannya. Dengan pengambilan beberapa sampel air di situ ini, maka didapatkan kualitas air dan status mutunya. Status mutu sampel air ini ditentukan dengan menggunakan metode STORET. Hasil dari penelitian ini menunjukkan bahwa penggunaan lahan yang berada di sekitar Situ Rawa Kalong mempengaruhi pencemaran dengan nilai BOD, COD dan Pb yang melebihi baku mutu. Selain itu, hasil penelitian ini juga menunjukkan bahwa zona beban cemaran yang tinggi terakumulasi di bagian situ yang lebih dalam.Situ Rawa Kalong is the main sources of water that is used by the peoples for fresh water fish cultivation. However, the ponds that used to be in contaminated conditions. This study aimed to acknowledge the impact of land use toward contamination and to acknowledge the contaminated zone at it. By taking several samples of water in it, then the water quality and quality status are determined. The quality status of water samples is determined using STORET method. The results of this study indicate that the land use that located around Situ Rawa Kalong affect the value of BOD, COD and Pb exceeding quality standards. In then, the results of this study also indicate that the zone of high contaminant load accumulated in the deeper parts of the pond."

"Saat ini wilayah pesisir Karimunjawa menghadapi tantangan berupa peningkatan tambak udang secara intensif. Masalah dalam penelitian ini adalah aktivitas tambak diduga berpotensi menimbulkan dampak pada wilayah pesisir. Pengolahan limbah yang ada tidak cukup baik sehingga menimbulkan kekhawatiran munculnya dampak pada wilayah pesisir. Tujuan penelitian adalah untuk mengetahui dampak pada wilayah pesisir dan menyusun strategi pengendalian tambak udang menggunakan bioindikator makrozoobenthos. Metode yang digunakan adalah metode campuran (mixed method). Hasil penelitian menunjukkan bahwa telah terjadi penurunan kualitas air terutama parameter TSS, nitrat dan fosfat. Indeks keanekaragaman genus makrozoobenthos di Karimunjawa termasuk kategori keanekaragaman sedang, yang menggambarkan kondisi perairan tercemar sedang. Dampak pada wilayah pesisir berupa penurunan populasi Tridacna, konversi ekosistem mangrove menjadi lahan tambak, terjadi konflik sosial/pro-kontra pada masyarakat dan masih sedikitnya pengunaan tenaga kerja lokal. Kesimpulan penelitian ini adalah strategi pengendalian tambak udang vaname menggunakan bioindikator makrozoobenthos yaitu pemantauan kualitas air budidaya tambak udang menggunakan Capitella sebagai bioindikator makrozoobenthos yang dilaksanakan oleh petambak, perbaikan performansi kinerja tambak dengan penebaran benur dan FCR yang sesuai standar serta perbaikan kualitas air tambak sehingga tercapai keberlanjutan tambak udang dan kelestarian wilayah pesisir.

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Currently, the coastal of Karimunjawa is facing challenges in the form of an intensive increase in shrimp ponds. The problem in this research is that pond activities are suspected to have the potential to impact coastal areas. The existing waste treatment is not good enough, giving rise to concerns about the impact on coastal areas. The aim of the research was to determine the impact on coastal areas and develop strategies for controlling shrimp ponds using macrozoobenthos bioindicators. The method used is a mixed method (mixed method). The results showed that there has been a decrease in water quality, especially in the TSS, nitrate and phosphate parameters. The diversity index of the macrozoobenthos genus in Karimunjawa is included in the moderate diversity category, which describes the condition of moderately polluted waters. The impact on coastal areas is in the form of a decrease in the Tridacna population, the conversion of mangrove ecosystems into ponds, social conflicts / pros and cons in the community and the use of local workers is still minimal. The conclusion of this study is the strategy for controlling vannamei shrimp ponds using macrozoobenthos bioindicators, namely monitoring the quality of shrimp pond aquaculture water using Capitella as a macrozoobenthos bioindicator carried out by farmers, improving pond performance by stocking fry and FCR according to standards and improving pond water quality so that pond sustainability is achieved. shrimp and sustainability of coastal areas."