Volume 20 No. 2, Desember 2006
http://hdl.handle.net/11617/256
2024-03-29T02:37:51ZPERUBAHAN KUALITAS AIRTANAH DI SEKITAR SUMBER PENCEMAR AKIBAT BENCANA GEMPA BUMI
http://hdl.handle.net/11617/263
PERUBAHAN KUALITAS AIRTANAH DI SEKITAR SUMBER PENCEMAR AKIBAT BENCANA GEMPA BUMI
Sudarmadji
Groundwater is the main domestic water supply of the population of the Yogyakarta Special Region, both in
the urban and as well as in the rural area due to its quantity and quality advantages. The rapid population growth has
caused an increase of groundwater demand, consequently it is facing some problems to the sustainability of groundwater
supply. Lowering of groundwater level has been observed in some places, as well as the degradation of groundwater quality.
Earthquake which stroke Yogyakarta on 27 May 2006, damaged buildings and other infrastructures in the area,
including roads and bridges. It might also damage the underground structures such as septic tanks, and pipes underneath
the earth surface. It might cause cracking of the geologic structures. Furthermore, the damage of underneath infrastructures
might create groundwater quality changes in the area. Some complains of local community on lowering and increasing
groundwater level and groundwater quality changes were noted. Field observation and investigation were conducted, including
collection of groundwater samples close to (the) pollution sources. Laboratory analyses indicated that some parameters
increased to exceed the drinking water quality standards. The high content of Coli form bacteria possibly was caused by
contamination of nearby septic tanks or other pollution sources to the observed groundwater in the dug well.
2006-12-01T00:00:00ZMODEL KONSERVASI AIRTANAH DI DATARAN PANTAI KOTA SEMARANG
http://hdl.handle.net/11617/262
MODEL KONSERVASI AIRTANAH DI DATARAN PANTAI KOTA SEMARANG
Purnama, Setyawan; Kurniawan, Andri; Sudaryatno
There are three objectives of this research. First, to build the model of groundwater usage and conservation
in the research area. Second, to identify the behaviour of model in various usages and conservations. Third, to formulate
the policy of groundwater resources management that suitable with the region caracteristic.
As a result, show that the programme Powersim 2.5c can be used dan applied in hydrologis, especially in building
groundwater conservation model. The conservation model that significantly suitable are to decrease the usage of water in
domestic and industrial sector. Relationship by the third objectives, the some policies that can be carried out to conservations,
namely decreasing water usage, restricting industrial growth, restricting settlement growth (especially in recharge area)
and increasing the capacity of PDAM production.
2006-12-01T00:00:00ZINVENTARISASI DAN PEMETAAN RAWAN LONGSOR KOTA MANADO – SULAWESI UTARA
http://hdl.handle.net/11617/261
INVENTARISASI DAN PEMETAAN RAWAN LONGSOR KOTA MANADO – SULAWESI UTARA
Kumajas, Mithel
Landslide constitutes a frequent problem occurs in Manado. It happens for many times from year to year and brings
both material disadvantage and casualty. The way and hilly topography of Manado, unstabel geological condition, high rainfall,
and the improper land use are assumed to be the trigger for the problem. The objective of this study is to inventory and map
landslide potential area as well as to design the preventive plan. Mapping method employs spatial approach by using land unit
as the analysis unit. The technique of analysis applies the assistance of GIS with its ArcView soft ware.
The result of mapping shows that the level landslide potential from potential until very potential category in
Manado is 1.815,72 Ha; potential is 1282,10 ha and very potential category is 533,62 ha. The faktors cause the
landslide comprise of rocky declivity, high rainfall, and the condition of stone as well as the unstabel and porous soil. The
existence of Cesar zone extends to the center of the city and the use of settlement land located in improper zone become
the trigger that quicken the occurrence of landslide.
The strategy implemented to manage the landslide potential area can be carried out through 1) law enforcement
in relation to city lay out, 2) landslide prevention through civil and vegetative technique, 3) the improvement of social
consciousness of the danger of landslide disaster and the attempt for social empowerment, and 4) the provision of the
landslide potential danger map as the ground for policy making in the effort to manage the landslide disaster.
2006-12-01T00:00:00ZHYDROMORPHOLOGY OF THE UNCONFINED GROUNDWATER IN THE SOUTH OF KLATEN DISTRICT (Data before Earthquake Mei 27th 2006)
http://hdl.handle.net/11617/260
HYDROMORPHOLOGY OF THE UNCONFINED GROUNDWATER IN THE SOUTH OF KLATEN DISTRICT (Data before Earthquake Mei 27th 2006)
Santosa, Langgeng Wahyu
There are some characteristics and distributions of unconfined groundwater variation in the research area.
Those are related to a system of water supply and consumptive use for drinking water. Variation of the groundwater
characteristic depends on variation of morphology. Therefore, it is needed to delineate hydromorphology units of the
regions as a base on groundwater resources management, especially for drinking water.
The aims of the research are: (1) to study of the characteristic and distribution of unconfined groundwater
variations base on landform units, (2) to study the factors that affect such variations, and (3) to establish the
hydromorphology units of the regions for groundwater resources management, especially for drinking water. The method
used in this research is landform approach and field survey. The sampling method is stratified sampling, based on
landform as the analysis approach.
Result of the research shows that there are some variations of groundwater characteristic at each landform. Landforms
which have good groundwater characteristic are Hydromorphology Unit of Fluvio Volcanic Plain of Young Merapi
(except Bayat region) and Hydromorphology Unit of Volcanic Foot Plain of Young Merapi. At those units, there are
good quality of groundwater, bicarbonate water (hydrochemical type I), having low electric conductivity, shallow of water
table, low in fluctuation, and middle to fast class in aquifer permeability. Those units are the most potential unconfined
groundwater resources management for drinking water. The units which have poor groundwater characteristic are
Hidromorphology Unit in Bayat Region, including Undulating Alluvial Plain, Fluvio Volcanic Plain of Young Merapi,
and Swamp Alluvial Plain. Generally, the groundwater quality is medium to poor, the hydrochemical type is Va (initiation
process of connate water) and type III (evaporate water), shallow up to medium of water table, and low to middle class of
aquifer permeability. The taste of groundwater is brackish to saline with high concentration of chloride.
2006-12-01T00:00:00Z