The Sand 2015 Sub Indo

[Rell Jette]

Weare now transitioning all ordering of Neptune Systems, EcoTech Marine, AquaIllumination, Bulk Reef Supply Wholesale, and all of our Aperture Exclusive Distribution Brands to the new Aperture Business website (aperturebusiness.com).

Caribsea's Arag-Alive! Live Reef Sand is a great choice for new aquarists and new reef tank setups. Arag-Alive sands clear quickly and contain millions of live bacteria, speeding up your tanks cycle and leading to less nuisance algae.

What kind of inhabitants will you be keeping?

Many species do require particular types of sand, like gobies, jawfish, and wrasses. Fish and invertebrates that like to burrow or sift through the sand will do best with smaller particle sizes.

Will it be for a refugium or deep sandbed?

Sand that will be used for filtration or refugium, we suggest using smaller particles that will give bacteria more surface area to grow and thrive on.

Below is a table of common tank sizes and how many pounds of Indo-Pacific Black sand is required to achieve a certain depth. Results may vary depending on the aquascaping in your tank, overflow styles, and the specific tank manufacturer. We always recommend getting a little extra sand to make sure you have enough on hand when you are filling your tank.

Susan said dredging deposited sand from the sea would likely deteriorate ocean health, particularly in terms of changing currents and subsequently affecting waves and increasing the potential for coastal abrasion.

She added that sand-dredging activities already taking place across Indonesia have often caused harm to fishing and coastal communities. One prominent case in South Sulawesi province has sparked fierce resistance by fishers against a dredging in their waters. The fishing community says the dredging activity has disrupted traditional fishing grounds, leading to a decline in catches of up to two-thirds since dredging began in February 2021.

The fisheries ministry will form a study team with officials from the energy ministry and the environment ministry, as well as academics and independent environmental groups to scout potential sites for dredging. They will then determine whether the sea sand there comprises deposits due to natural occurrences, and then allocate that sand for either domestic or export needs. Once the locations and volumes allowed to be dredged have been determined, the government will issue permits to paying companies with the capability to dredge sea sand, the ministry said.

Data from Indonesian environmental NGO Auriga Nusantara show the government has issued 141 marine dredging concessions to 118 businesses, covering a total area of 131,157 hectares (324,096 acres), or twice the size of Jakarta. KIARA noted the country also has reclamation projects with a total size of 3.5 million hectares (8.6 million acres). The fisheries government estimated in 2021 that 1.87 million cubic meters (66 million cubic feet) of sand would be needed to supply reclamation projects throughout the country.

Precision milled and smooth sanded with a square edge or micro-beveled face, to showcase the subtle beauty of the wood grain. Ready for installation and site sanding and finishing. Our exclusive flooring offers the authentic beauty of 18th and 19th century planks reclaimed into very special engineered flooring. With an incredibly durable surface from years of weathering, this Sand floor is available in smooth, wire-brush or patina textures. Indoteak Wire Brush texturing naturally removes the softest parts of the hardwood-aging the appearance and leaving a naturally distressed, and incredibly durable surface.

Colors:

Ranges from Light Browns to Tans and Golden and Red hues. Specially formulated, our Sand finish is meant to give the appearance of natural teak, but with a durable and long lasting protection.

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

A reliable irrigation system is essential for a country to implement a robust and significant national food system1,2. Irrigation is a technique to supply, manage, and release water to benefit the agricultural sector3. The benefits of irrigation are generally used to widely meet the water needs for agriculture, including livestock and fisheries4,5. Irrigation needs for rice plants still dominate the overall irrigation requirements in Indonesia, and it is delivered through a surface irrigation network6. The irrigation network is typically equipped with a sand trap-a device behind the irrigation intake-to deposit sediment carried from the river before it enters the primary irrigation channel7,8. Sand traps are commonly employed to enhance the efficacy of irrigation systems and have an important function for preventing or controlling canal sedimentation9. Immediately downstream of the irrigation intake is a sand trap fitted with a flushing gate10,11; its typical layout is shown in Fig. 1. The sediment deposited in the sand trap is cleaned on a frequent basis through manual or hydraulic techniques9,10,12. Sand trap is the initial barrier preventing sediment from the river before entering the irrigation network8,9,10. Therefore, insufficient sand trap performance might lead to sedimentation in the irrigation system. It will naturally reduce the irrigation conveyance efficiency13 and over the long term, this might represent a threat to agricultural productivity14. Around the world, irrigated areas contribute around 40% of agricultural production and 60% of crop yields14,15,16,17.

Sediment yield at irrigation scheme inlets can be used to assess the vulnerability of irrigation sand traps. In general, sediment yield estimation is needed for soil and water conservation studies, including reservoir or irrigation channel sedimentation24,25. In Indonesia, there is limited study on sediment yield estimation in the volcanic river basin. A previous similar study had only examined a small-scale young volcanic catchment using a long-duration field measurement method and had been done 30 years ago26. It was discovered that the rainfed agricultural land contributed nearly half of the soil erosion, contributing to the sediment yield26. Updated research with a broader scope is needed that discusses the sediment yield pattern in the volcanic basin and its integration including the irrigation system. This can contribute to integrated water resource management. Another study recently conducted in 2019 modeled precipitation-runoff and sediment production at the Upper Opak Basin, that is portion of the POS River Basin. It was found that the highest sediment yield of the area from 2004 to 2013 was 147.8 tons/year. There is no further discussion regarding the comparison with other volcanic catchments or how this sediment yield relates to the irrigation system. In addition, there is no study on the vulnerability of irrigation networks based on sediment yield. Several existing studies discuss susceptible watersheds to sediment yield and sediment yield estimation to assess the area's vulnerability to soil erosion27,28,29,30,31,32.

There are several models used to predict soil erosion on a watershed scale, including empirical models, namely the universal soil loss equation (USLE) as well as its revised and modified versions (RUSLE and MUSLE)33; and a physical-based model, namely soil and water assessment tools (SWAT)34. USLE is a simple model with accessible and well-established parameters, so it is widely used in various parts of the world, while its disadvantage is that it cannot measure sedimentation35,36,37. RUSLE is a refinement of the USLE model, and this model will be better if combined with Geographic Information Systems (GIS)25. RUSLE is usually used for estimating annual erosion. The disadvantage of this model is that it cannot measure the amount of sediment produced38. MUSLE is a modified version of RUSLE that includes additional parameters that are not always accessible. The advantage of this model is that it can show the amount of sedimentation39. While SWAT is a complete model, it contains parameters of information about climate, soil properties, topography, plants, and land management contained in the watershed. It has been integrated with computers so that it is efficient to use, but one disadvantage is that the parameters used are quite large and must be filled when the model is operated, even though the desired results do not actually require these parameters40.

The study area: POS Volcanic River Basin, Indonesia. It is a basin comprised of three major watersheds: Progo, Opak, and Serang. This river basin contains Mount Merapi, one of the world's most active volcanoes, as well as other volcanoes, and is therefore known as the volcanic river basin46.

In addition to Mount Merapi, the POS River Basin is home to four more volcanoes: Mount Sindoro (3136 m MSL), Mount Sumbing (3240 m MSL), Mount Merbabu (3142 m MSL), and Mount Telomoyo (1894 m MSL). Nevertheless, these four volcanoes are classified as semi-active. Mount Sumbing last erupted violently in 1730, Mount Merbabu in 1797, and Mount Sindoro in 1910, while Mount Telomoyo has never erupted. This is unlike Merapi, which generally erupts every three to nine years, with the most recent explosive eruption in 2010. Because of its significance, Merapi is one of the world's sixteen volcanoes in the Decade Volcanoes project. The designation given by the International Association of Volcanology and Chemistry of the Earth's Interior to 16 volcanoes is deemed important for scientific study based on the history of large-scale and destructive eruptions and their location close to densely populated settlements. All these reasons make the POS River Basin fascinating to investigate. It can represent 126 other volcanic basins in Indonesia and other tropical regions in studies of sediment yields linked with irrigation systems.

3a8082e126