Rain falling on the Watershed will turn into a stream in the river, this is because the rainwater is not entirely infiltrated into the soil, the unabsorbed water is called surface runoff. Factors affecting runoff are meteorological elements and drainage elements. This study aims to calculate the surface runoff coefficient using land cover maps 2017 and 2050, slope and soil type as parameters. Cook method divides the watershed characteristics into 4 sections as parameters to calculate the runoff coefficient of topography, soil type, vegetation cover and surface deposit. Each parameter is weighted based on its characteristics to calculate the coefficient of surface runoff symbolized by the letter C. The analysis results show that in the year 2017 obtained the value of C = 0.4734 and for the year 2050 C = 0.4785. There's a difference of 0.0051 coefficient of runoff value between land use map and land cover in 2017 and 2050. The results of this study will be used to calculate the flood discharge design in the object of research in Makassar City.

No abstract

Precipitation is the descent of water from the atmosphere to the surface of the earth which is usually rain, snow, fog, dew and hail, the amount of water falling on the surface of the earth can be measured by rain gauges, the distribution of rain in the space can be known by measuring rain in some locations and areas reviewed. In a variety of human activities, rainfall becomes one of the data needs, especially in the study of water availability for consumption, irrigation building planning and mapping of flooded areas. This study aims to analyze local rainfall data on research objects by utilizing global weather data, the observation period for 15 years i.e., from 2000-2014. This research using Thiessen polygon method based on Geographic Information System (GIS) application, rainfall data sourced from global wheater, accessed on August 28, 2017. The results showed that the distribution of rainfall in the research object is represented by 2 rainfall stations, namely station p_521194 and station p_521197. The highest maximum daily rainfall occurred in 2002 of 149.80 mm while the lowest occurred in 2008 amounted to 68.76 mm. Rainfall data will be used to analyze flood discharge in Makassar city.

Abstrak: Fenomena perkotaan pesisir berupa pertumbuhan penduduk yang tinggi, perkembangan ekonomi yang pesat dan kontrol laut yang tidak memadai, menyebabkan penggunaan laut dan daerah pantai menjadi lebih intensif dalam beberapa tahun terakhir. Perkembangan ini menyebabkan pemekaran kota makin intensif di pesisir salah satunya dengan reklamasi. Reklamasi telah dilakukan di banyak kota dunia dan juga di Indonesia, namun banyak kendala. Penelitian tentang model Reklamasi yang berkelanjutan masih langka. Tujuan penulisan ini adalah untuk merumuskan suatu model reklamasi yang dapat diterapkan pada kawasan pesisir dengan menggunakan indeks keberlanjutan. Penelitian ini dimulai dengan studi literatur indeks keberlanjutan yang telah dikembangkan sebelumnya yang berfokus pada keberlanjutan kawasan pesisir yang diseleksi dengan analytic hierarchy process (AHP) dan expert choices. Indeks keberlanjutan reklamasi lalu digunakan sebagai alat menyusun model reklamasi yang berkelanjutan. Model ini, akan membantu memproyeksikan aktifitas reklamasi dan hubungannya dengan langkah-langkah yang cocok untuk mengelola pelaksanaan reklamasi yang berkelanjutan. Perumusan model dilakukan melalui analisis Structural Equatian Model (SEM) pada pesisir pantai Makassar kemudian diuji kelayakan hingga ditemukan model reklamasi yang sesuai. Kata Kunci: model, reklamasi pantai, Indeks Keberlanjutan Reklamasi, Structural Equatian Model (SEM)Abstract: Coastal urban phenomenon in the form of high population growth, rapid economic development and inadequate control of the sea, resulting in the use of the sea and coastal regions become more intensive in the last few years. This development led to the expansion of the city was further intensified by the coastal reclamation. Reclamation has been performed in many cities of the world and also in Indonesia, but many constraints. Research on model of sustainable Reclamation is still rare. The purpose of this paper is to formulate a model that could be applied on a coastal reclamation area using an index of sustainability. This research began with literature study of previous researches of developing sustainability index that not focusing yet on coastal reclamation area with the analytic hierarchy process (AHP) and expert choices. Reclamation sustainability index is used to as a tool to develop a sustainable reclamation model. This model will help project of reclamation activities and its relationship with suitable measures to manage the implementation of a sustainable reclamation. Formulation of the model is done by analysis of Structural Equatian Model (SEM) on the Makassar coastal zone and then tested the feasibility to found the appropriate reclamation model.

Salah satu daerah di Indonesia yang rawan banjir pada waktu musim penghujan adalah Kabupaten Wajo Provinsi Sulawesi Selatan. Banjir yang  terjadi disebabkan oleh meluapnya air dari Danau Tempe akibat Sungai Walanae, Sungai Bila, Sungai Belokka, Sungai Batu-batu dan Sungai Lawo yang membawa sedimentasi dari daerah hulu kemudian bermuara di Danau Tempe. Banjir yang hampir terjadi setiap tahunnya tersebut, menyebabkan kerugian materil maupun non-materil bagi masyarakat utamanya yang berada di wilayah sekitar Danau Tempe. Selain itu, belum adanya pemetaan secara menyeluruh terkait mitigasi bencana banjir di Pesisir Danau Tempe. Tujuan dari penelitian ini adalah pemetaan daerah rawan banjir di Pesisir Danau Tempe Kabupaten Wajo berbasis sistem informasi geografis. Metode pencapaian target luaran disusun berdasarkan proses perencanaan konsep dan arahan. Perencanaan dijabarkan/implementasikan pada konsep-kosep kemitigasi-bencanaan sehingga menghasilkan sebuah arahan atau kebijakan untuk mitigasi bencana banjir di pesisir Danau Tempe Kabupaten Wajo. Konsep perencanaan ini di hasilkan dari proses penelitian dimulai dari identifikasi masalah, survei baik secara primer dan sekunder, kegiatan analisis data - kajian teori, dan keluaran berupa arahan kebijakan