Water Pollution Index of Batujai Reservoir, Central Lombok Regency-Indonesia

Abstract

Batujai reservoir is located in Central Lombok Regency, Indonesia. The government and local people use it for hydropower generation, drinking water, agricultural irrigation, fish farming, and tourism. The phenomenon of growing population and increasing industrial activities in the catchment area of Batujai reservoir always result in the discharge of various pollutants into the aquatic environment and cause the blooming of water hyacinth over almost 30% of the reservoir area. The aim of this study was to determine the water pollution index of Batujai reservoir. The samples were analysed for the following parameters: pH, temperature, DO, COD, BOD, TSS, and heavy metals. The research was done by using purposive sampling method and determination of water quality status with STORET method based on Government Regulation No. 82/2001. The measurement results show that the physical and chemical parameters of the Batujai reservoir water do not exceed the quality standard are the temperature (29 to 32°C

Estimation of Water Losses Through Evapotranspiration of Water Hyacinth (Eichhornia crassipes)

“…Water is the most important resource on earth, it is essential for human beings, economic development, biodiversity, agricultural, industry and domestic use (Laaboudi et al, 2012;Thamaga and Dube, 2018). One of the sources of water in Central Lombok is the Batujai Reservoir, located in Batujai Village, West Praya, Central Lombok Regency, West Nusa Tenggara Province, built in 1977Province, built in -1982 with a variation of the water depth of 6 -8 m, inundation area of 890 ha (Rahim and Soeprobowati, 2019). Has a gross capacity of 25  Received for publication February 25, 2019 Accepted after corrections April 7, 2019 million m 3 , effective capacity reaches 23.5•10 6 m 3 (Yasa et al, 2018) and minimum capacity reaches 1.4•10 6 m 3 .…”

Pengelolaan Wilayah Pesisir Pantai Olo Yang Disebabkan Limbah Domestik Masyarakat

“…Pencemaran air, sebagai masalah yang kompleks, menunjukkan karakteristik khusus seperti modularitas, desentralisasi, variabilitas, struktur yang buruk, dan prediktabilitas yang lemah [3]. Barubaru ini, metode statistik multivariat seperti analisis klaster, analisis diskriminan, dan analisis faktor dan regresi telah digunakan untuk mengeksplorasi variabilitas spasial dan temporal kualitas air permukaan, kontribusi sumber pencemaran terkait, dan korelasi antara parameter pencemaran dan lingkungan [4].…”

Mechanism of the Rapid Shrinkage of Limboto Lake in Gorontalo, Indonesia

“…This invasion of water hyacinth is predicted to seriously threaten the lake and, in particular, lead to the conversion of lake border areas into land, resulting in further reduction in lake storage capacity. Since the bloom of water hyacinth has accelerated with eutrophication in the lake [39], which itself is caused by urbanization and agricultural development [48][49][50], lake shrinkage is expected to occur ever more rapidly in the future. Moreover, the notable increase in zonal NDVI values can be interpreted as arising from the blooming of water hyacinth, which likely invaded the lake prior to 1991.…”

“…A variety of research studies and projects have recently been conducted at diverse scales ranging from local to watershed levels to mitigate severe lake degradation due to increased sedimentation. These include environmental management strategies, such as sedimentation and sludge management [10,14], aquatic environment management [36], watershed management [37,38], environmental assessments [7,17,32,39], and lake extent monitoring [30,40]. Technical assistance for flood mitigation has been provided in collaboration with international development agencies from, for example, Canada and Japan [7].…”