The purpose of the research is the determinationof Irrigation water requirement based on primer datas collectingand analysis factors of land preparation, plant growth,determination of water loss due to percolation. Irrigation waterrequirement depends from various factors in the preparation ofthe land, plant growth, determination of water loss due topercolation, the determination of the replacement of water andrain layer effectively. The availability of irrigation water iscalculated based on discharge data retrieval on the TaroangSecondary channel. which then processed to obtain the finalresult of the availability of water in the channel. Results of thestudy shown that needs water to irrigate an area of secondarychannels Taroang covering an area of 2,140 Ha as much 39.11m3/s. While the availability of water that goes into the secondarychannel taroang where discharge a minimum of 0.12 m3/s and themaximum discharge of 0.31 m3/s.

For the first time, this experimental research analyzed the efficacy of rice straw fiber as soil cover in controlling slope erosion using a physical model. Three variations of rainfall intensity, soil slope degree, and rice straw fiber were conducted in this research. The results showed that rice straw fiber in the physical model had reduced the amount of erosion significantly. In general, a higher erosion rate was obtained with the increases of rainfall intensity and soil slope degree. The experiment was conducted with the percentage 30%, 60%, and 90% of soil cover using rice fiber straw, reducing erosion rates by 92.09%, 95.55%, and 98.21 %, respectively. Therefore, the higher the percentage of rice straw fiber used as soil cover, the smaller the ground will be affected by erosion. The ratio from the soil affected by erosion was 7.91%, 4.45%, and 1.79%, respectively. The result reveals that there is a significant decrease in erosion due to the increase of fiber used in the experiments. Meanwhile, the amount of erosion in the physical model without soil cover was 98.21% for the same rainfall severity and soil slope degree. This research showed that the application of rice straw fiber as a soil surface shield is highly effective in controlling slope erosion.

The tools and methods used in the measurement of water flow velocity are now very diverse, such as by using Venturi Meter, Orifice, Current Meter, Pitot Tube, and so forth. To learn more about water flow velocity measurement method, in order to improve professionalism in the field of water resources can be done research at Hydraulics Laboratory by researching Water Flow Analysis by Using Pitot Tubes. The research process will be carried out using three varied channel basis samples: reviewing the velocity of the water flow at the bottom of the channel with slippery base, reviewing the flow rate of the water on the gravel base channel, and reviewing the flow rate of the water on the channel with the decking concrete base. The expected result of this research is knowing the distribution of velocity in a cross section such as drainage channel, irrigation channel and river, so construction of water structure can be adjusted position placement in the open channel section. In addition it can be used as a reference in planning an open channel. One of the benefits to construction cofferdam construction speed distribution is to determine the dewatering system to be carried out during construction.Keywords— Flow Speed, Speed Distribution. Channel Basic Variations

Hydrological data is the data that became the basis of planning activities Water Resources Management (SDA) in the river area, such as irrigation building planning, water building, river management, flood control and others. Therefore, hydrological data needs to be managed into a geographic information system to provide accurate, true and timely SDA information for all interested parties. By knowing the position of climate observation post and rain station along with the climatic and rainy data, which can be observed by the public, it is expected that the control over the implementation of development can be done more openly. The results obtained from this research are digital map position of observation post along with climate data, water level and rainfall along with South Sulawesi Province that can be used by public, government, and educational institution that need location of station position and data recording climate observations, water levels and rainfall in South Sulawesi.