Surface Runoff occurs due to high rainfall that falls in an area that is able to caused flooding. Infiltration Biopori Technology serves to reduce storm water runoff is to increase the water absorbing soil thus reducing surface runoff that often causes floods. This research aim was to get the value of infiltration without biopori infiltration and infiltration with infiltration biopori, as well as obtaining the presentation of discharge runoff can be reduced by 1 piece infiltration biopori on a plot of land with an area of 100 m2. The research methods used quantitative methods. Primary data obtained from testing on-site infiltration studies used Single Tool Infiltrometer Ring with a diameter of 25 cm, were analyzed used the method of Horton Curve. Secondary data, precipitation last 10 years from the year 2006 to 2015 obtained from BMKG Djalaludin Gorontalo Airport consists of three stations that BPP-Tapa, Talumelito, Slamet Djalaludin Gorontalo, then analyzed used rational methods to obtain discharge of the runoff. Analysis of the results obtained, infiltration without absorption biopori was 4.5 cm / hour, once created biopori infiltration infiltration rate rose to 38.1 cm / hour, and 1 absorption biopori on a plot of land with an area of 100 m2 can reduce runoff discharge at 10.82%

Botubarani Beach is a coastal tourist attraction that has activities that can stimulate economic growth for people who are on the coast. Research and identification of the handling of natural phenomena in the shoreline is needed to provide the right handling solution in order to avoid increasing the level of more severe damage. The purpose of this study is to analyze and plan the types and dimensions of the right coastal protection building at Botubarani Beach. Beach buildings are used to protect the coast against damage caused by wave and current attacks. Coastal buildings are classified into three groups according to their function, ie construction constructed on shore and parallel to the shoreline (revetment), constructed on a straight coastal and coastal (groin and jetty) constructions constructed offshore and approximately parallel to the coastline (breakwater). The results of data analysis and calculation found that the building that will be used to handle sedimentation in Botubarani Beach is a break water building with the type of building that is rubble mount. Plate water level elevation is 1,694 m and for selected tetrapod protected layer.

Limbah kaca menyebabkan masalah lingkungan yang kronis karena sangat sulit terurai di dalam tanah. Kaca banyak digunakan dalam kehidupan sehari-hari melalui produk manufaktur seperti kaca lembaran, botol, dan barang pecah belah. Kaca adalah bahan yang berpotensi besar untuk didaur ulang. Penggunaan kaca daur ulang membantu dalam penghematan energi dan perbaikan lingkungan. Meningkatnya kesadaran akan daur ulang kaca mempercepat perubahan penggunaan limbah kaca dengan bentuk berbeda di berbagai bidang. Salah satu kontribusinya yang signifikan adalah pada bidang konstruksi dimana limbah kaca digunakan kembali untuk produksi beton. Sifat-sifat beton yang mengandung limbah kaca sebagai agregat halus diteliti dalam penelitian ini. Limbah kaca digunakan sebagai pengganti sebagian agregat halus pada campuran beton 20%, 40%, 60%, 80% dan 100%. Kuat tekan beton umur 3, 7, 14, 21 dan 28 hari dibandingkan dengan beton yang dibuat dengan agregat halus alami (beton normal). Hasil tersebut membuktikan bahwa kekuatan tertinggi diberikan oleh limbah debu kaca setelah 28 hari. Kuat tekan benda uji dengan variasi limbah kaca 20% dan 40% memiliki kuat tekan melebihi dari kuat tekan rencana (24,95Mpa), masing-masing 26,290Mpa dan 25,602 Mpa atau melebihi 5,4% dan 2,6%. Jika dibandingkan dengan kuat tekan rata-rata beton dan beton karakteristik beton normal, semua variasi limbah kaca mengalami penurunan. Di masa depan, penggunaan limbah kaca dalam beton ramah lingkungan akan memberikan dampak yang baik untuk konservasi sumber daya alam.

Limboto is one of the watersheds in Indonesia that have suffered considerable damage. The degradation of Limboto Watershed was caused by extended land allocation for dry land agriculture that does not regard conservation practices, especially for corn as the main commodity from Gorontalo. Watershed degradation is directly proportional to an increase in critical land affected by various factors, which are land use, slope, and soil erosion. The aim of this research is to assess and to represent the spatial distribution of critical land in the Limboto Watershed based on the Directorate-General of Watershed Management and Forest Protection Regulation Number P.3/PDASHL/SET/KUM.1/7/2018 on the Technical Guidelines for the Drafting Spatial Data on Critical Land. The factors of critical land were collected and processed through a geographic information system (GIS)-based approach. The results of this study indicated that the Limboto Watershed is dominated by land of rather critical class. This provides useful information for decision makers and the local government to take appropriate land management measures in Limboto Watershed.

Research on the use of limboto lake sludge as raw material for bricks by adding sand as a mixture of materials using experimental quantitative research. In the study used limboto lake silt with sand mixture with variations of2%, 5%, 7%, 10% and 15%. Related variables are physical and mechanical properties of bricks. The controlling variable is the materials used.The results showed that bricks with raw material from limboto lake sludge with a mixture of sand with variations of 2%,5%, 7%, 10% and 15% did not produce the right composition to have the same quality of bricks with bricks using raw materials clay. Penelitian pemanfaatan endapan lumpur danau limboto sebagai bahan baku batu bata dengan penambahan pasir sebagai bahan campurnya menggunakan penalitian kuantitatif yang bersifat eksperimen. Dalam penelitian digunakan bahan endapan lumpur danau limboto dengan campuran pasir dengan variasi 2%, 5%, 7%, 10% dan 15%. Variabel terkait berupa sifat fisik dan mekanik batu  bata. Variabel pengendali adalah bahan-bahan yang digunakan. Hasil penelitian menunjukan bahwa batu bata dengan bahan baku endapan lumpur danau limboto dengan campuran pasir dengan variasi 2%, 5%, 7% 10% dan 15% tidak  menghasilkan komposisi yang tepat untuk memiliki kualitas batu bata yang sama dengan batu bata yang menggunakan bahan baku tanah liat.