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"Ketersediaan air di DAS Lusi Kabupaten Blora - Provinsi Jawa Tengah saat ini dalam pengelolaannya akan dimanfaatkan sebagai stunber air baku dan irigasi.Analisis pemanfaatan kebutuhan air di DAS Lusi Kabupaten Blora - Provinsi Jawa Tengah meliputi : air domestik, pertanian, dan industri, total kebutuhan air Lmtuk domestik, pertanian dan industri di selumh SWS Lusi adalah sebesar 5.302.537.000 m3. Proyeksi kebutuhan air sampai dengan tahun 2031 di SWS Lusi mengacu terhadap Tata Guna Lahan SWS Lusi di Kabupaten Blora yang tertuang di dalam Rencana Tata Ruang Wilayah Kabupaten Blora tahun 2011 - 2031.Hasil analisis sampai tahun 2031 kebutuhan air 9.358.240.000 m?, sedangkan ketersediaan air hujan rata - rata 259.858.589.580 m3 ini menunjukkan bahwa ketersediaan air tiap tahunnya kondisinya surplus. Kualitas air SWS Lusi di Kabupaten Blora saat ini masih memenuhi parameter kualitas air Kelas II sesuai dengan PP No.82 Tahtm 2001 dimana ada beberapa parameter kimia yang tidak memenuhj syarat.Berdasarkan prediksi dengan mengacu terhadap parameter BOD, COD pada tahun 2031 maka apabila tidak dilakukan beberapa pencegahan maka kualitas air Sungai Lusi akan mengalami penurunan kualitas kelas air. Peninjauan kualitas lingkimgan dapat dilakukan dengan menggunakan metode invertebrata walauptm sebetulnya metode ini hanya bertujuan mengetahui kualitas lingkungan dengan metode cepat, dari penelitian yang dilakukan di SWS Lusi di Kabupaten Blora saat ini menunjukan skor 5,6 ini berarti kualitas lingkungan di SWS Lusi berkulitas sedang. Sebagai rekomendasi untuk memanfaatkan potensi aliran air yang terbuang di SWS Lusi dapat dilakukan dengan meningkatkan tampungan air di SWS Lusi yaitu membangun situ atau embimg sesuai dengan kebutuhan serta dapat juga melakukan pengelolaan WS Lusi, dengan cara mengatur penggunaan lahan dan melakukan tindakan konservasi tanah dan air sehingga dapat menahan aliran yang terbuang. Untuk mengurangi penurunan kualitas air dan lingkungan di Wilayah Sungai Lusi maka dapat dilakukan pengendalian kualitas di lingkungan masing - masing dan dapat dilakukan sosialisasi kepada masyarakat di Wilayah Sungai Lusi mengenai pentingnya menjaga kualitas air dan lingkimgan di SWS Lusi.

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Availability of water in the watershed Lusi Blora District - Central Java Province is currently in its management will be utilized as a source of raw water and irigasi. Analysis utilization of water needs in watershed Lusi Blora Regency - Central Java province include: domestic water, agriculture, and industry, total water demand for domestic, agricultural and industries around the SWS Lusi is at 5.302.537.000 m3.

Water demand projections until the year 2031 in the SWS Lusi Land Use refers to the SWS Lusi in Blora district that contained in the Regional Spatial planning Blora district in 2011 - 203l.The analysis of water needs until the year 2031 was 9.358.240.000 m3. Availability Precipitation average is 259.858.589.580 m3.

Water quality in the District Blora SWS Lusi currently meet Class II water quality parameters in accordance with Regulation No.82 of 2001 where there are several chemical parameters that do not meet syarat.Based prediction by referring to the parameters of BOD, COD in the year 2031 then, if not done some precautions the Lusi River water quality will decrease the quality of the water class.

A review of environmental quality can be done using the method of invertebrates, although this method is only really aimed at knowing the quality of the environment with rapid methods, from research conducted in SWS Lusi Blora District cturently shows the mean quality score of 5.6 in SWS Lusi enviromnent of very moderate.

As a recommendation to utilize the potential flow of water is wasted in the SWS Lusi can be done by increasing the volume of water in the SWS Lusi situ or ponds are built in accordance with the requirements and can also manage WS Lusi, by regulating land use and conduct soil and water conservation measures so it can withstand the waste stream.

To reduce the environmental and water quality degradation in the Lusi River Region can do quality control on their enviromnent - each and can be disseminated to the public at Lusi River Region on the importance of maintaining water quality and the enviromnent in SWS Lusi."

"ABSTRAK Many soil foundation of dams failed due to the formi g of ipe-shaped discharge channels known as piping between the soil layer and foundation . These failures may be due to subsurface or internal erosion starting near downstream toe along the base of the structure or another bulding plane"

"One of the attempts to optimize the usage of water resources particularly in creating the enrgy is through optimizing the maintenance of the dam. Optimation policy can be conducted by estimating water volume of the dam in terms of the time and space function that can give highest usage value. One of the optimation techniques that can be implemented is Bellman Dynamic Program. This technique simplifies the operational problem of the dam by divided into step by step solution. The optimation result of the maintenance of Saguling Dam with Bellman Dynamic Program brings more profit which is 20.6% higher than maintenance with constant debit. The added profit can be achieved under fluctuated electricity rate."

"Tujuan dari penelitian ini adalah mengaplikasikan metode perhitungan daya dukung sumber daya air untuk kasus daerah perkotaan padat penduduk dan daerah pedesaan. Metode daya dukung sumber daya air yang digunakan adalah metode rasional dan metode kesetimbangan air. Status daya dukung sumber daya air ditentukkan dengan membandingkan ketersediaan dan kebutuhan sumber daya air.Hasil penelitian menunjukan bahwa status daya dukung sumber daya air berdasarkan kedua metode tersebut menunjukan status defisit pada daerah perkotaan, namun surplus pada daerah perdesaan. Dalam skala yang lebih kecil status ini bervariasi secara spasial. Verivikasi di lapangan menunjukan status daya dukung sumber daya air bertolak belakang dengan hasil perhitungan dengan kedua metode. Daerah perdesaan yang surplus ternyata di lapangan mengalami defisit, dan juga sebaliknya pada daerah perkotaan.

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The purpose of this research is to apply the method of calculation capacity of water resources for cases urban areas high populated and rural areas. This research used rational method and water balance method. Status of capacity of water resources determained by comparing the availability and commodity of water resoources.

The results of the study showed that status of capacity of water resources base on both method showed status the deficit in the urban areas, but there was a surplus for rural areas. On a smaller scale this status varying in spatial. Field verification shown status capacity water resources in contrast with the calculation on with both method. Rural areas that surplus it appeared in the field suffered a deficit, and also in urban areas."