The Batang Agam Hydroelectric Power Plant is the oldest Hydroelectric Power Plant in West Sumatera, which is located in the district of Lima Puluh Kota. The Hydroelectric Power Plant started operating in 1976 with a Nett power is 10.5 MW. In its operation so far the turbine of the Batang Agam Hydroelectric Power Plant decrease in the performance compared to the initial commissioning. The impact of decreasing turbine efficiency of Batang Agam Hydroelectric Power Plant lead use of water to convert its energy electricity be wasteful. Therefore it is necessary to research so that the turbine can effectively use the river water that has been dammed in the Kolam Tando more efficient. From the results of analysis obtained the conclusion that the efficiency of the turbine Batang Agam Hydroelectric Power Plant at 3.5 MW from the highest to the lowest; Unit 1 with 86.7% efficiency, Unit 3 with 83.9% efficiency and Unit 2 with 79.2% efficiency. Compared with commissioning data unit-units in the turbine of Batang Agam Hydroelectric Power Plant has decreased efficiency of the amount; Unit 1 of 0.32%, Unit 2 of 7.80% and Unit 3 is 3.05%.

Tumbuhan eceng gondok yang menyebar hampir ke seluruh embung atau perairan Kayu Tanduak mengakibatkan para petani di masyarakat sepenulisr kekurangan atau kehilangan air, sehingga eceng gondok menghambat aliran irigasi sawah dan ladang. Masalah pertumbuhan eceng gondok yang pesat ini  memberikan dampak langsung kepada pendapatan hasil panen baik ladang atau sawah yang berkurang. Program Pengabdian bagi Masyarakat ini mempunyai tujuan untuk meningkatkan pengetahuan dan keterampilan masyarakat sasaran  tentang pengolahan eceng gondok menjadi biogas. Masyarakat yang menjadi sasaran pada kegiatan ini adalah Ibu-Ibu PKK Jorong Kayu Tanduak pada khususnya dan masyarakat sepenulisr Jorong Kayu Tanduak. Metode yang digunakan dalam melakukan pengabdian ini adalah (1) sosialisasi tentang pengolahan eceng gondok menjadi biogas, (2) pelatihan pembuatan alat biogas dari eceng gondok, (3) melakukan penyebaran kuisioner sebelum dan sesudah pelatihan tentang pengetahuan tentang pembuatan alat biogas dari eceng gondok. Kegiatan ini memberikan dampak positif kepada Ibu-Ibu PKK ini antara lain : (1) Peningkatan pengetahuan dan keterampilan tentang pengolahan eceng gondok menjadi biogas yang diketahui dari hasil penyebaran angket sebelum dan sesudah pelatihan, (2) tersebarnya informasi tentang pemanfaatan eceng gondok menjadi biogas dari jorong Kayu Tanduak Kabupaten Tanah Datar. Kata kunci: Eceng Gondok, Biogas, Jorong Kayu Tanduak ABSTRACT The plant of water hyacinth which spread throughout reservoir or water pool in Kayu Tanduk has made the farmers surrounding become lack or loss of water. Water hyacinth has also affected the flow of irrigation for rice fields and fields.  The rapid growth problem of water hyacinth gives direct impact to the farmers harvest income in the rice fileds and fields. This community service program (PKM) is purposed to increase the knowledge and craftsmanship for villagers and society about how to process water hyacinth into biogas.The main target community in this program is the mothers of empowering family welfare group (PKK) at Kayu Tanduak and the society of its surrounding. The methods used in this program are 1) socialization to society how to process it,2) giving training to society how to make biogas tools,3) distributing the questionnaires to society in order to see how far their undesrstanding about the water hyacinth process into biogas before training and after training.This activity give positive impacts to the mothers of empowering family welfare (PKK), they are: 1) there is an increasing of their knowledge and craftsmanship about how to process water hyacinth into biogas. It can be seen from the result of the questionnaires before and after training. 2) The spread information to society about the utilizing water hyacinth process into biogas is increased especially in the village of Kayu Tanduk Tanah Datar. Keywords: Biogas, Water hyacinth, The village of Kayu Tanduk

The phenomenon of flow in a pipe is one of the experiments carried out in the Mechanical Phenomenon Practicum in bachellor of Mechanical Engineering. In this paper, we will describe the experimental results of the tool that was made in mechanical engineering prgram, west sumatera muhammadiyah university for the first time. The pump used is large enough to 1.0 HP, it is expected that the pressure will be high enough and cause turbulent flow. Measuring instruments installed are Pressure Gauge, Stopwatch, and Water Meter. Water is pumped from the source (reservoir) in the form of a tub to a network of pipes with diameters of ¾ ", ½" and 5/8 "by installing pressure sensors at the pump output and each of pipe. The water meter is useful for measuring the rate of water, resulting in greater flow losses. At the greater the flow velocity, resulting in a large Reynolds Number, while the velocity, at this time, namely by measuring the output capacity of 5 ml which is then measured the time needed using a stopwatch. The variation of the water flow rate is made by distinguishing the valve openings, namely 4/4 total openings then ¾, ½ and ¼. The experimental results show that the smaller the valve opening than the smaller the flow rateflow friction loss has not so effect because of the flow is in turbulent conditions. The design of this experimental tool is in compliance with the friction theory of fluid flow in pipes, closed flow, for the next stage it is necessary to develop a tool by entering the length per diameter factor (parameter)of the circulation pipe, further for laminar flow where the sensitivity of the Reynolds number has more effect on friction losses so need the precision measurement tools.