Rainfall

FMJ[BSEP-PSRVF

4. Rainfall

‘Žȱ ŠŸŽ›ŠŽȱ ›Š’—Š••ȱ ŠŠȱ ™›˜Ÿ’Žȱ ‹¢ȱ ‘Žȱ ›˜ŽȮ Ȭȱ

ŽŠ‘Ž›ȱ Š’˜—ȱ ’—ȱ ž–Š—Šœǰȱ •˜’•˜ȱ ’••žœ›ŠŽȱ ‘Žȱ ›Ž—ȱ ˜ȱ

™›ŽŒ’™’Š’˜—ȱ˜›ȱ‘Žȱ™Ž›’˜ȱ™›’•ȱŘŖŖşȱ˜ȱŠ›Œ‘ȱŘŖŗŖȱǻ’ž›ŽȱŞǼǯȱ’‘ȱ

™›ŽŒ’™’Š’˜—ȱ Šœȱ›ŽŒ˜›Žȱ‹Ž ŽŽ—ȱ–˜—‘œȱ˜ȱž•¢ȱ˜ȱžžœȱŘŖŖşȱ  ‘Ž—ȱ›˜™’ŒŠ•ȱœ˜›–œȱœŠ›Žȱ˜ȱ˜ŒŒž›ȱ˜ȱ’—Œ•žŽȱ‘ŽȱŠ›ŽŠȱ ‘Ž›Žȱ‘’œȱ

œž¢ȱ ŠœȱŒ˜—žŒŽǯȱȱ

ž›‘Ž›–˜›ŽǰȱŠ’•¢ȱ™›ŽŒ’™’Š’˜—ȱ Šœȱ›ŽŒ˜›Žȱ˜›ȱ‘Žȱ™Ž›’˜ȱ ‘Ž—ȱ

‘Žȱœž¢ȱ ŠœȱŒ˜—žŒŽȱǻ’ž›ŽœȱşȱŠ—ȱŗŖǼǯȱ‘ŽȱŠŠȱ Ž›Žȱ˜‹Š’—Žȱ

›˜–ȱ •˜’•˜ȱ ŠŽȱ ˜••ŽŽȱ ˜ȱ ’œ‘Ž›’Žœȱ ǻǼȱ Šȱ ‘Ž’›ȱ ž˜–Š’Œȱ

ŽŠ‘Ž›ȱ¢›˜–ŽŽ›ȱŠ’˜—ȱ’—ȱŠ—ȱ—›’šžŽǰȱ•˜’•˜ǯȱ’–’•Š›•¢ǰȱ‘’‘ȱ

Figure 8. Average rainfall data collected daily for the period covering April 2009 to March 2010 by the AgroMet-PAG-ASA Weather Station in Dumangas, Iloilo.

N.V. GOLEZ, I.G. BORLONGAN, F. LORQUE

176

Figure 9. Daily rainfall data collected by ISCOF at their Automatic Weather Hydrometer Station in San Enrique, Iloilo for the wet season, period covering April to September 2010.

Figure 10. Daily rainfall data collected by ISCOF at their Automatic WeatherHydrometer Station in San Enrique, Iloilo for the dry season, period covering October 2009 to March 2010.

HYDROLOGICAL ASSESSMENT OF JALAUR RIVER

177

›ŠŽȱŠ—ȱŸ˜•ž–Žȱ˜ȱ›Š’—ȱ˜˜”ȱ™•ŠŒŽȱ’—ȱ‘ŽȱœŽŒ˜—ȱ‘Š•ȱ˜ȱž•¢ȱ˜ Š›œȱ

‘ŽȱŽ—ȱ˜ȱžžœǯȱ—ȱ‘Žȱ˜‘Ž›ȱ‘Š—ǰȱ›Š’—Š••ȱœŽŽ–’—•¢ȱ›Ž ȱŒ•˜œŽ›ȱ

˜ȱ Š—ȱ Ž—ȱ ’—ȱ ‘Žȱ •Šœȱ šžŠ›Ž›ȱ ˜ȱ ˜ŸŽ–‹Ž›ȱ ŘŖŖşȱ  ‘Ž—ȱ ‘Žȱ •ȱ ’Û˜ȱ

™‘Ž—˜–Ž—˜—ȱŒŠ–ŽȱŠ‹˜žȱŽŠ›•’Ž›ȱ‘Š—ȱ˜›ŽŒŠœǰȱ™˜œœ’‹•¢ȱ’—’ŒŠ’—ȱ‘Žȱ  ˜›œŽ—’—ȱœ’žŠ’˜—ȱ˜ȱŒ•’–ŠŽȱŒ‘Š—Žǯ

’‘Žœȱ™›ŽŒ’™’Š’˜—ȱ˜ȱřŗŝǯŘŚȱ––ȱ’—ȱ ŽȱœŽŠœ˜—ȱŠ—ȱ‹Š›Ž•¢ȱśǯŘȱ

––ȱž›’—ȱ›¢ȱœŽŠœ˜—ȱ Šœȱ›ŽŒ˜›Žǯ

Š’—Š••ȱŠ•œ˜ȱŠěŽŒœȱœ˜’•ȱ™ǯȱŠŽ›ȱ™Šœœ’—ȱ‘›˜ž‘ȱ‘Žȱœ˜’•ȱ•ŽŠŒ‘Žœȱ

‹Šœ’Œȱ—ž›’Ž—œȱœžŒ‘ȱŠœȱŒŠ•Œ’ž–ȱŠ—ȱ–Š—Žœ’ž–ȱ›˜–ȱ‘Žȱœ˜’•ǯȱ‘Ž¢ȱ

Š›Žȱ›Ž™•ŠŒŽȱ‹¢ȱŠŒ’’ŒȱŽ•Ž–Ž—œȱœžŒ‘ȱŠœȱŠ•ž–’—ž–ȱŠ—ȱ’›˜—ǯȱ˜›ȱ‘’œȱ

›ŽŠœ˜—ǰȱœ˜’•œȱ˜›–Žȱž—Ž›ȱ‘’‘ȱ›Š’—Š••ȱŒ˜—’’˜—œȱŠ›Žȱ–˜›ŽȱŠŒ’’Œȱ

‘Š—ȱ‘˜œŽȱ˜›–Žȱž—Ž›ȱŠ›’ȱǻ›¢ǼȱŒ˜—’’˜—œǯȱž•™‘ŠŽœȱ˜ȱ’›˜—ȱŠ—ȱ

Š––˜—’ž–ǰȱŽ•Ž–Ž—Š•ȱœž•™‘ž›ȱŠ—ȱ˜›Š—’Œȱ–ŠĴŽ›ȱŠ›ŽȱžœŽȱ˜ȱ•˜ Ž›ȱ

‘Žȱ™ȱǻ’—Œ›ŽŠœŽȱŠŒ’’¢Ǽȱ˜ȱ‘Žȱœ˜’•ȱǻŠ—’Ž•ǰȱŠ›˜—ǰȱǭȱŠŽĴŽǰȱŗşşŝǼǯ 5. Bottom Sediments

˜’•ȱŽ¡ž›Žȱ‘Ž•™œȱžœȱ˜ȱž—Ž›œŠ—ȱ‘˜ ȱŠȱœ˜’•ȱ ’••ȱ™Ž›˜›–ǯȱ‘žœǰȱŠȱ

‹ŽĴŽ›ȱž—Ž›œŠ—’—ȱ˜ȱœ˜’•ȱ™‘¢œ’ŒŠ•ȱ™›˜™Ž›’ŽœȱŒŠ—ȱ‹Ž—ŽęȱœŽŸŽ›Š•ȱ

œŽŒ˜›œȱ ˜ȱ œ˜Œ’Ž¢ȱ ›˜–ȱ Œ˜––˜—ȱ •Š¢™Ž›œ˜—œȱ ˜ȱ œŒ’Ž—’œœǯȱ ‘’œȱ ¢™Žȱ

˜ȱ ”—˜ •ŽŽȱ ’œȱ Œ›žŒ’Š•ȱ  ‘Ž—ȱ ŽŸŠ•žŠ’—ȱ œ˜’•œǯȱ ˜›ȱ Ž¡Š–™•Žǰȱ Šȱ œ˜’•ȱ

‘Šȱ’œȱ‘’‘ȱ’—ȱœ’•ȱŠ—ȱŒ•Š¢ȱ ’••ȱ™ŠŒ”ȱ’‘Ž›ȱŠ—ȱ›Š’—ȱœ•˜ Ž›ȱ‘Š—ȱŠȱ

œŠ—¢ȱœ˜’•ǯȱ˜—œŽšžŽ—•¢ȱŠȱꗎȱŽ¡ž›Žȱœ˜’•ȱ–Š¢ȱ‹Žȱ‘’‘•¢ȱŽœ’›Š‹•Žȱ

˜›ȱŠ—ȱŽ–‹Š—”–Ž—ȱ‹žȱ—˜ȱŠœȱŠȱ˜˜ȱŠœȱŠ›’Œž•ž›Š•ȱœ˜’•ǯȱȱœ’–™•Žȱ

Š™™›˜ŠŒ‘ȱ˜ȱŽŽ›–’—’—ȱŽ¡ž›Žȱ ’••ȱ—˜ȱ ˜›”ȱ’ȱ‘Žȱœ˜’•ȱŒ˜—Š’—œȱŠȱ

•˜ȱ˜ȱ¢™œž–ȱ ‘’Œ‘ȱ’œȱ—˜›–Š••¢ȱ™’—”’œ‘ȱ ‘’Žȱ’—ȱŒ˜•˜›ǯȱ

˜Ĵ˜–ȱ œŽ’–Ž—œȱ  Ž›Žȱ œž‹“ŽŒŽȱ ˜ȱ –ŽŒ‘Š—’ŒŠ•ȱ œ’£Žȱ Š—Š•¢œ’œǯȱ

Žœž•ȱ ˜ȱ ‘Žȱ ™Š›’Œ•Žȱ œ’£Žǰȱ ’œ›’‹ž’˜—ǰȱ ȱ Š—ȱ œ˜’•ȱ Ž¡ž›Žȱ Š—Š•¢œ’œȱ

œ‘˜ Žȱ‘Šȱ‘ŽȱœŽ’–Ž—œȱ’—ȱž™œ›ŽŠ–ȱœŠ’˜—ȱ ŠœȱœŠ—¢ȱ ‘’•Žȱ‘˜œŽȱ

œŽ’–Ž—œȱŠ”Ž—ȱ›˜–ȱ‘Žȱ–’œ›ŽŠ–ȱŠ—ȱ˜ —œ›ŽŠ–ȱœŠ’˜—œȱ Ž›Žȱ

˜ž—ȱ˜ȱ‹ŽȱœŠ—¢ȱ•˜Š–ȱ˜ȱœ’•¢ȱ•˜Š–ǰȱ›Žœ™ŽŒ’ŸŽ•¢ȱǻŠ‹•ŽȱŘǼǯ

˜’•ȱŽ¡ž›Žǰȱ’—ȱ‘’œȱŒŠœŽȱŒ•Š¢ȱŒ˜—Ž—ǰȱŽ¡Ž›œȱŠȱ–Š“˜›ȱŒ˜—›˜•ȱ˜—ȱ

‘ŽȱŠ–˜ž—ȱ˜ȱœ•˜ ȱ–˜Ÿ’—ȱœŽ’–Ž—œȱŠ—ȱ‘Ž›Ž˜›Žȱ’—ĚžŽ—ŒŽœȱ‘Žȱ

œ˜›ŠŽȱŠ—ȱŽ™˜œ’’˜—ȱ˜ȱ‘ŽŠŸ¢ȱœŠ—ȱŠ—ȱœ’•ȱ ‘’•ŽȱŽŒ›ŽŠœ’—ȱ‘Žȱ

¢—Š–’Œȱ̘ ȱ˜ȱ‘Žȱ›’ŸŽ›ȱ ŠŽ›ǯȱŽ›¢ȱŒ˜Š›œŽȱœŠ—ȱŠ—ȱ–Ž’ž–ȱœŠ—ȱ

˜–’—ŠŽȱ‘Žȱž™œ›ŽŠ–ȱœŠ’˜—ȱ ‘’•ŽȱŠȱ‘’‘Ž›ȱ™Ž›ŒŽ—ŠŽȱ˜ȱ–’¡Žȱ ꗎȱœŠ—ǰȱœ’•ȱŠ—ȱŒ•Š¢ȱŒ˜–™›’œŽȱ‘Žȱœ˜’•ȱœ›žŒž›Žȱ˜ȱœŽ’–Ž—œȱ’—ȱ‘Žȱ

–’œ›ŽŠ–ȱŠ—ȱ˜ —œ›ŽŠ–ȱœŠ’˜—œǯȱ‘Š—Žœȱ’—ȱœŽŠœ˜—ȱž›’—ȱ‘Žȱ

Œ˜ž›œŽȱ˜ȱ‘ŽȱŽ¡™Ž›’–Ž—ȱ‹Š›Ž•¢ȱ‹›˜ž‘ȱŠ•Ž›Š’˜—œǰȱŠ—ȱ—Ž’‘Ž›ȱ’ȱ

‘Ž¢ȱŒŠžœŽȱ›Š—œ˜›–Š’˜—œȱ˜—ȱ‘Žȱœ›žŒž›ŽȱŠ—ȱŽ¡ž›Žȱ˜ȱœŽ’–Ž—œȱ

Ž¡Š–’—Žǯȱ ’•ȱ Š—ȱ Œ•Š¢ȱ Ž™˜œ’’˜—ȱ ’—ȱ ‘Žȱ ˜ —œ›ŽŠ–ȱ ǻŠ‹’ŠœŠ—ǰȱ N.V. GOLEZ, I.G. BORLONGAN, F. LORQUE

178

Table 2. Soil texture and composition of sediments taken from sampling sites along the Jalaur River during the duration of experiment (July 2009ȮMarch 2010). Sampling Site Wet Season Dry Season (July—September) (January—March) ȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱŽ›ŒŽ—ȱȱ•Šœœ’ęŒŠ’˜—ȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱŽ›ŒŽ—ȱȱ•Šœœ’ęŒŠ’˜— SandSiltClayTextureSandSiltClayTexture Š—‹Š—ȱŽšžŽÛ˜ǰȱŠ•’—˜ȱȱŞşǯŘŚȱŝǯŜşȱřǯŖŝȱŠ—ȱȱŞşǯŞŖȱŝǯŗŚȱřǯŖŜȱŠ— –‹Š—ȱŽšžŽÛ˜ǰȱŠ—ȱ—›’šžŽȱȱşŖǯŝŖȱŞǯŗŚȱŗǯŗŜȱŠ—ȱȱŞřǯŗŖȱŚǯŖŞȱŘǯŞŘȱŠ— ’ŒžŠ—ǰȱ’—•ŽȱȱȱśŜǯŖŞȱŚŖǯśŚȱřǯřŞȱŠ—¢ȱ˜Š–ȱŞŝǯşŚȱŗŗǯśŜȱŖǯśŖȱŠ—¢ȱ˜Š– ˜›˜‹˜›˜ǰȱ’—•ŽȱȱȱřşǯŖŝȱśŞǯşŚȱŗǯşşȱ’•¢ȱ˜Š–ȱŗŗǯŖŜȱŞŚǯřřȱŚǯŜŗȱ’•¢ȱ˜Š– Š‹’ŠœŠ—ǰȱŽŠ—ŽœȱȱȱřŞǯŗŘȱŜŖǯŖŖȱŗǯŞŞȱ’•¢ȱ˜Š–ȱřŜǯŚşȱŜŗǯŖŖȱŘǯśŗȱ’•¢ȱ˜Š–

HYDROLOGICAL ASSESSMENT OF JALAUR RIVER

179

ŽŠ—ŽœǼȱœ‘˜ Žȱœ˜–Žȱ’쎛Ž—ŒŽœȱ‹žȱ—˜ȱœ˜ȱ›Ž–Š›”Š‹•ŽȱŠŽ›ȱœŽ›’Žœȱ

˜ȱ̘˜’—ȱ¢™‘˜˜—ȱŠ—ȱ˜››Ž—’Š•ȱ›Š’—œǯ

’œŒ‘Š›ŽȬœŽ’–Ž—ȱ Œ˜—ŒŽ—›Š’˜—ȱ ŒŠ—ȱ ‹Žȱ Œ˜››Ž•ŠŽȱ ˜ȱ ‘Žȱ

˜Š•ȱ œžœ™Ž—Žȱ œ˜•’œȱ ǻǼȱ ›Žœž•œȱ ˜ȱ ‘Žȱ  ŠŽ›ȱ œŠ–™•Žœȱ Š”Ž—ȱ

œ’–ž•Š—Ž˜žœ•¢ǯȱ ‘’œȱ œ’žŠ’˜—ȱ ›Žœž•œȱ ›˜–ȱ ‘Žȱ Œ˜–‹’—Š’˜—ȱ ˜ȱ

‘Žȱ ’쎛Ž—ȱ ‘¢›˜•˜’ŒŠ•ȱ ›Ž’–Žœȱ ’—ȱ ‘Žȱ ž™™Ž›ǰȱ –’•Žȱ Š—ȱ •˜ Ž›ȱ

œ›ŽŠ–œȱ˜ȱ‘ŽȱŠ•Šž›ȱ’ŸŽ›ȱ¢œŽ–ǯȱ‘Žȱ›Žœž•œȱ›ŽĚŽŒȱ‘Žȱ’—ĚžŽ—ŒŽȱ

˜ȱ‘Žȱž™™Ž›ȱœ›ŽŠ–ȱ›’‹žŠ›’Žœȱǻ‘’‘ȱ’œŒ‘Š›ŽȱŠ—ȱ‘’‘ȱœ’•ȱŒ˜—Ž—ȱ

ž›’—ȱ›Š’—¢ȱŠ¢œǰȱ ‘Ž›ŽŠœȱ‘Žȱ›¢ȱœŽŠœ˜—ȱœŠ–™•’—ȱ–˜—‘œȱǻŠ—žŠ›¢ȱ

˜ȱŠ›Œ‘Ǽȱœ‘˜ ȱ‘ŽȱŽěŽŒȱ˜ȱŽŠ›•¢ȱ˜—ȬœŽȱ˜ȱ•ȱ’Û˜ȱ˜ŒŒž››Ž—ŒŽȱ˜—ȱ‘Žȱ

›’ŸŽ›ȱœ¢œŽ–Ȃœȱ‘¢›˜•˜’ŒŠ•ȱŒ‘Š›ŠŒŽ›’œ’Œœȱ™Š›’Œž•Š›•¢ȱ ŠŽ›ȱŽ™‘ǰȱ ̘ ȱ›ŠŽǰȱŠ—ȱ›Š—œ™Š›Ž—Œ¢ǯ

˜’•ȱ™ȱ˜›ȱœ˜’•ȱ›ŽŠŒ’˜—ȱ’œȱŠ—ȱ’—’ŒŠ˜›ȱ˜ȱ‘ŽȱŠŒ’’¢ȱ˜›ȱŠ•”Š•’—’¢ȱ

˜ȱœ˜’•ȱŠ—ȱ’œȱ–ŽŠœž›Žȱ’—ȱ™ȱž—’œǯȱ—ȱŠŒ’ȱœ˜•ž’˜—ȱ‘ŠœȱŠȱ™ȱŸŠ•žŽȱ

˜ȱ•Žœœȱ‘Š—ȱŝǯȱ‘’•ŽȱŠȱ‹Šœ’Œȱœ˜•ž’˜—ȱŠ• Š¢œȱ‘ŠœȱŠȱ™ȱ•Š›Ž›ȱ‘Š—ȱŝǰȱ

Š—ȱ Š•”Š•’—Žȱ œ˜•ž’˜—ȱ ǻ’ǯŽǯǰȱ Šȱ œ˜•ž’˜—ȱ  ’‘ȱ ™˜œ’’ŸŽȱ ŠŒ’ȱ —Žž›Š•’£’—ȱ

ŒŠ™ŠŒ’¢ǼǰȱŒŠ—ȱŠ•œ˜ȱ‹ŽȱŽę—ŽȱŠœȱ‘Žȱ—ŽŠ’ŸŽȱ•˜Š›’‘–ȱ˜ȱ‘¢›˜Ž—ȱ

’˜—œȱ ’—ȱ ‘Žȱ œ˜’•ȱ ǻ–’‘ǰȱ Ž˜™•Žœǰȱ ŽŽ›‘’œ’—‘Žǰȱ Š–Žœǰȱ Š›Ž—ǰȱ ǭȱ

ž˜–’ǰȱŗşşŚǼǯȱȱ‘Ž›Ž˜›Žȱ˜Žœȱ—˜ȱ—ŽŒŽœœŠ›’•¢ȱ‘ŠŸŽȱŠȱ™ȱ•Š›Ž›ȱ‘Š—ȱŝǯȱ

˜’•œȱŽ—ȱ˜ȱ‹ŽŒ˜–ŽȱŠŒ’’ŒȱŠœȱŠȱ›Žœž•ȱ˜DZȱǽŗǾȱ›Š’— ŠŽ›ȱ•ŽŠŒ‘’—ȱŠ Š¢ȱ

‹Šœ’Œȱ’˜—œȱǻŒŠ•Œ’ž–ǰȱ–Š—Žœ’ž–ǰȱ™˜Šœœ’ž–ȱŠ—ȱœ˜’ž–ǼǰȱǽŘǾȱŒŠ›‹˜—ȱ

’˜¡’Žȱ ›˜–ȱ ŽŒ˜–™˜œ’—ȱ ˜›Š—’Œȱ –ŠĴŽ›ȱ Š—ȱ ›Š’—ȱ  ŠŽ›ȱ ˜›–’—ȱ  ŽŠ”ȱ˜›Š—’ŒȱŠŒ’œǰȱŠ—ȱǽřǾȱŽŒŠ¢ȱ˜ȱ˜›Š—’Œȱ–ŠĴŽ›ȱŠ—ȱŠ––˜—’ž–ȱ

Š—ȱœž•ž›ȱŒ˜—Ž—œǯȱ‘Žȱ™ȱŸŠ•žŽȱ˜ȱŠȱœ˜’•ȱ’œȱ’—ĚžŽ—ŒŽȱ‹¢ȱ‘Žȱ”’—œȱ

˜ȱ™Š›Ž—ȱ–ŠŽ›’Š•œȱ›˜–ȱ ‘’Œ‘ȱ‘Žȱœ˜’•ȱ Šœȱ˜›–Žȱǻ•’Šœ˜—ǰȱŗşşşǼǯȱ

˜’•œȱ ŽŸŽ•˜™Žȱ ›˜–ȱ ‹Šœ’Œȱ ›˜Œ”œȱ Ž—Ž›Š••¢ȱ ‘ŠŸŽȱ ‘’‘Ž›ȱ ™ȱ ŸŠ•žŽœȱ

‘Š—ȱ‘˜œŽȱ˜›–Žȱ›˜–ȱŠŒ’ȱ›˜Œ”œȱǻ‘Ĵ™DZȦȦ   ǯœ–Š›Š›Ž—’—ǯŒ˜–Ǽȱ

‘Žȱ›Š—Žȱ˜ȱ‘Žȱ™‘¢œ’Œ˜ȬŒ‘Ž–’ŒŠ•ȱŒ‘Š›ŠŒŽ›’œ’Œœȱ˜ȱ‘ŽȱœŽ’–Ž—œȱ

Š”Ž—ȱ›˜–ȱ‘Žȱ’쎛Ž—ȱœŠ–™•’—ȱœ’Žœȱ˜ȱŠ•Šž›ȱ’ŸŽ›ȱǻŠ‹•ŽȱřǼȱœ‘˜ œȱ

œ˜’•ȱ™ȱ Šœȱ—Žž›Š•ȱ˜ȱœ•’‘•¢ȱ‹Šœ’Œǯȱ

‘˜œ™‘˜›žœȱ’œȱ˜—Žȱ˜ȱ‘Žȱ‘›ŽŽȱ—ž›’Ž—œȱŽ—Ž›Š••¢ȱŠŽȱ˜ȱœ˜’•œȱ

’—ȱ Ž›’•’£Ž›œǯȱ ‘Žȱ Œ˜—ŒŽ—›Š’˜—ȱ ˜ȱ ȱ ’œȱ žœžŠ••¢ȱ œžĜŒ’Ž—•¢ȱ •˜ ȱ ’—ȱ

›Žœ‘ȱ ŠŽ›ȱœ˜ȱ‘ŠȱŠ•ŠŽȱ›˜ ‘ȱ’œȱ•’–’Žǯȱ‘Ž—ȱ•Š”ŽœȱŠ—ȱ›’ŸŽ›œȱŠ›Žȱ

™˜••žŽȱ ’‘ȱǰȱŽ¡ŒŽœœ’ŸŽȱ›˜ ‘ȱ˜ȱŠ•ŠŽȱ˜Ž—ȱ›Žœž•œǯȱ’‘ȱ•ŽŸŽ•œȱ

˜ȱŠ•ŠŽȱ›ŽžŒŽȱ ŠŽ›ȱŒ•Š›’¢ȱŠ—ȱŒŠ—ȱ•ŽŠȱ˜ȱŽŒ›ŽŠœŽœȱ’—ȱŠŸŠ’•Š‹•Žȱ

’œœ˜•ŸŽȱ ˜¡¢Ž—ȱ Šœȱ ‘Žȱ Š•ŠŽȱ ŽŒŠ¢œǰȱ Œ˜—’’˜—œȱ ‘Šȱ ŒŠ—ȱ ‹Žȱ ŸŽ›¢ȱ

Ž›’–Ž—Š•ȱ˜ȱŠ–Žȱ꜑ȱ™˜™ž•Š’˜—œǯȱŠ—¢ȱ™‘˜œ™‘ŠŽȱŒ˜–™˜ž—œȱ

Š›Žȱ —˜ȱ ŸŽ›¢ȱ œ˜•ž‹•Žȱ ’—ȱ  ŠŽ›Dzȱ ‘Ž›Ž˜›Žǰȱ –˜œȱ ˜ȱ ‘Žȱ ™‘˜œ™‘ŠŽȱ ’—ȱ

—Šž›Š•ȱœ¢œŽ–œȱŽ¡’œœȱ’—ȱœ˜•’ȱ˜›–ǯȱ˜ ŽŸŽ›ǰȱœ˜’•ȱ ŠŽ›ȱŠ—ȱœž›ŠŒŽȱ  ŠŽ›ȱǻ›’ŸŽ›œȱŠ—ȱ•Š”ŽœǼȱžœžŠ••¢ȱŒ˜—Š’—ȱ›Ž•Š’ŸŽ•¢ȱ•˜ ȱŒ˜—ŒŽ—›Š’˜—œȱ

˜ȱ’œœ˜•ŸŽȱǻ˜›ȱœ˜•ž‹•ŽǼȱ™‘˜œ™‘˜›žœȱǯȱŽ™Ž—’—ȱ˜—ȱ‘Žȱ¢™Žœȱ˜ȱ N.V. GOLEZ, I.G. BORLONGAN, F. LORQUE

180

–’—Ž›Š•œȱ’—ȱ‘ŽȱŠ›ŽŠǰȱ‹˜’Žœȱ˜ȱ ŠŽ›ȱžœžŠ••¢ȱŒ˜—Š’—ȱŠ‹˜žȱŗŖȱ™™‹ȱ˜›ȱ

–˜›Žȱ˜ȱ’œœ˜•ŸŽȱȱŠœȱ˜›‘˜™‘˜œ™‘ŠŽǯȱ‘’œȱ’œȱžœžŠ••¢ȱŽœ’–ŠŽȱ‹¢ȱ

ŠȱŒ‘Ž–’ŒŠ•ȱŽœȱ‘Šȱ’œȱŽœ’—Žȱ˜ȱ–ŽŠœž›Žȱ‘Žȱ’œœ˜•ŸŽȱȱŠ—ȱ‘Žȱ

™Š›’Œž•ŠŽȱȱ‘ŠȱŠ›ŽȱŽŠœ’•¢ȱŠŸŠ’•Š‹•ŽȱǻȱŗşŞşǼǯȱ—ȱœ˜’•œǰȱȱ–Š¢ȱ

Ž¡’œȱ’—ȱ–Š—¢ȱ’쎛Ž—ȱ˜›–œǰȱ‘˜ ŽŸŽ›ǰȱȱ’—ȱœ˜’•œȱŒŠ—ȱ‹Žȱ‘˜ž‘ȱ˜ȱ

Ž¡’œ’—ȱ’—ȱřȱȃ™˜˜•œȃDZȱǽŗǾȱœ˜•ž’˜—ȱȱ™˜˜•ǰȱǽŘǾȱŠŒ’ŸŽȱȱ™˜˜•ǰȱŠ—ȱǽřǾȱ ę¡Žȱȱ™˜˜•ǯȱ

‘Žȱœ˜•ž’˜—ȱȱ™˜˜•ȱ’œȱŸŽ›¢ȱœ–Š••ǰȱžœžŠ••¢ȱ’—ȱ‘Žȱ˜›‘˜™‘˜œ™‘ŠŽȱ

˜›–ǯȱ‘ŽȱŠŒ’ŸŽȱȱ™˜˜•ȱ’œȱȱ’—ȱ‘Žȱœ˜•’ȱ™‘ŠœŽȱ ‘’Œ‘ȱ’œȱ›Ž•Š’ŸŽ•¢ȱŽŠœ’•¢ȱ

›Ž•ŽŠœŽȱ˜ȱ‘Žȱœ˜’•ȱœ˜•ž’˜—ǯȱ‘Žȱę¡Žȱȱ™˜˜•ȱ˜ȱ™‘˜œ™‘ŠŽȱ ’••ȱŒ˜—Š’—ȱ

’—˜›Š—’Œȱ™‘˜œ™‘ŠŽȱŒ˜–™˜ž—œȱ‘ŠȱŠ›ŽȱŸŽ›¢ȱ’—œ˜•ž‹•ŽȱŠ—ȱ˜›Š—’Œȱ

Œ˜–™˜ž—œȱ‘ŠȱŠ›Žȱ›Žœ’œŠ—ȱ˜ȱ–’—Ž›Š•’£Š’˜—ȱ‹¢ȱ–’Œ›˜˜›Š—’œ–œȱ’—ȱ

‘Žȱœ˜’•ǯȱ‘˜œ™‘ŠŽȱ’—ȱ‘’œȱ™˜˜•ȱ–Š¢ȱ›Ž–Š’—ȱ’—ȱœ˜’•œȱ˜›ȱ¢ŽŠ›œȱ ’‘˜žȱ

‹Ž’—ȱ–ŠŽȱŠŸŠ’•Š‹•Žȱ˜ȱ™•Š—œȱŠ—ȱ–Š¢ȱ‘ŠŸŽȱŸŽ›¢ȱ•’Ĵ•Žȱ’–™ŠŒȱ˜—ȱ‘Žȱ

Ž›’•’¢ȱ˜ȱŠȱœ˜’•ǯȱ˜–Žȱœ•˜ ȱŒ˜—ŸŽ›œ’˜—ȱ‹Ž ŽŽ—ȱ‘Žȱę¡Žȱȱ™˜˜•ȱŠ—ȱ

‘ŽȱŠŒ’ŸŽȱȱ™˜˜•ȱ˜Žœȱ˜ŒŒž›ȱ’—ȱœ˜’•œȱǻ˜›˜•ȱǭȱŠĴ›Š¢ǰȱŗşşşǼǯȱ

ȱ ‘˜œ™‘˜›žœȱ ’—ȱ œ˜’•œȱ ’œȱ Š•–˜œȱ Ž—’›Ž•¢ȱ Šœœ˜Œ’ŠŽȱ  ’‘ȱ œ˜’•ȱ

™Š›’Œ•Žœǯȱ‘Ž—ȱœ˜’•ȱ™Š›’Œ•ŽœȱŠ›ŽȱŒŠ››’Žȱ˜ȱŠȱ›’ŸŽ›ȱ˜›ȱ•Š”Žǰȱȱ ’••ȱ‹Žȱ

Œ˜—Š’—Žȱ ’—ȱ ‘’œȱ œŽ’–Ž—ǯȱ ‘Ž—ȱ ‘Žȱ œŽ’–Ž—ȱ ›ŽŠŒ‘Žœȱ Šȱ ‹˜¢ȱ ˜ȱ  ŠŽ›ȱ’ȱ–Š¢ȱŠŒȱŠœȱŠȱœ’—”ȱ˜›ȱŠȱœ˜ž›ŒŽȱ˜ȱȱ’—ȱœ˜•ž’˜—ǯȱ—ȱŽ’‘Ž›ȱŒŠœŽǰȱ

’ȱ’œȱŠȱ™˜Ž—’Š•ȱœ˜ž›ŒŽȱ˜ȱȱ‘Šȱ–Š¢ȱŽŸŽ—žŠ••¢ȱ‹Žȱ›Ž•ŽŠœŽȱǻŠž’›Žǰȱ

’–œǰȱ ǭȱ ˜Š•Žǰȱ ŘŖŖŖǼǯȱ ˜œȱ œ˜’•œȱ ‘ŠŸŽȱ Šȱ •Š›Žȱ ŒŠ™ŠŒ’¢ȱ ˜ȱ ›ŽŠ’—ȱ ǯȱ

—Œ›ŽŠœ’—ȱ‘ŽȱŠ–˜ž—œȱ˜ȱ™‘˜œ™‘ŠŽȱ’—ȱœ˜’•œȱ›Žœž•œȱ’—ȱ’—Œ›ŽŠœŽȱ•ŽŸŽ•œȱ

˜ȱ™‘˜œ™‘ŠŽȱ’—ȱœ˜’•ȱœ˜•ž’˜—œǯȱ‘’œȱ ’••ȱŽ—Ž›Š••¢ȱ›Žœž•ȱ’—ȱœ–Š••ȱ‹žȱ

™˜Ž—’Š••¢ȱ’–™˜›Š—ȱ’—Œ›ŽŠœŽœȱ’—ȱ‘ŽȱŠ–˜ž—œȱ˜ȱ™‘˜œ™‘ŠŽȱ’—ȱ ŠŽ›ȱ

‘Šȱ™ŠœœŽœȱ˜ŸŽ›ȱ˜›ȱ‘›˜ž‘ȱœ˜’•œȱǻž’ǰȱ‘˜–™œ˜—ǰȱǭȱ‘Š—ǰȱŗşşşǼǯ ȱ ‘˜œ™‘˜›˜žœȱ ǻǼȱ Ž¡’œœȱ ’—ȱ ŸŠ›’˜žœȱ ˜›–œȱ ’—ȱ –’—Ž›Š•ȱ œ˜’•œǰȱ

‹Ž’—ȱŽšžŠ••¢ȱ’Ÿ’Žȱ‹Ž ŽŽ—ȱ‘Šȱ’—ȱœ˜’•ȱ˜›Š—’Œȱ–ŠĴŽ›ȱŠ—ȱ‘Šȱ’—ȱ

ŸŠ›’˜žœȱ’—˜›Š—’Œȱ˜›–œǯȱ‘Žȱ•ŠĴŽ›ȱȱ˜›–œȱŠ›Žȱ™›’–Š›’•¢ȱ–’¡ž›Žœȱ˜ȱ

Š•ž–’—ž–ǰȱ ’›˜—ǰȱ Š—ȱ ŒŠ•Œ’ž–ȱ ™‘˜œ™‘ŠŽœǯȱ —Ž›ȱ ŠŒ’’Œȱ Œ˜—’’˜—œǰȱ

™‘˜œ™‘ŠŽœȱ Œ˜–‹’—Žȱ  ’‘ȱ ’›˜—ȱ Š—ȱ Š•ž–’—ž–ȱ Š—ȱ ž—Ž›ȱ Š•”Š•’—Žȱ

Œ˜—’’˜—ȱ ’ȱ ’œȱ ™›ŽœŽ—ȱ Šœȱ ŒŠ•Œ’ž–ȱ ™‘˜œ™‘ŠŽǯȱ ˜—œŽšžŽ—•¢ǰȱ ‘Žȱ

Ž¡›ŠŒ’˜—ȱ™›˜ŒŽž›Žȱ˜›ȱ‘Žȱ–ŽŠœž›Ž–Ž—ȱ˜ȱ™•Š—ȬŠŸŠ’•Š‹•Žȱȱ ’••ȱ

‹Žȱ˜ŸŽ›—Žȱ˜ȱŠȱ•Š›ŽȱŽ›ŽŽȱ‹¢ȱœ˜’•ȱ™ǯȱ‘Žȱ‘’‘Žœȱ™‘˜œ™‘˜›˜žœȱ

ŠŸŠ’•Š‹’•’¢ȱ’œȱ’—ȱ‘Žȱ™ȱ›Š—Žȱ˜ȱŜȮŝǯȱ‘˜œ™‘ŠŽȱ’—ȱ–žȱ’œȱ›Ž•ŽŠœŽȱ’—ȱ

•Š›ŽȱŠ–˜ž—œȱ˜ȱ‘Žȱ ŠŽ›ȱ ‘Ž—ȱ’›˜—ȱŠ—ȱŠ•ž–’—ž–ȱ’œœ˜Œ’ŠŽȱž—Ž›ȱ

›ŽžŒŽȱŒ˜—’’˜—ǯȱ‘˜œ™‘˜›˜žœȱ’—ȱ–žȱ’œȱ’–™˜›Š—ȱ’—ȱ›Žž•Š’—ȱ

™‘¢˜™•Š—”˜—ȱ™›˜žŒ’Ÿ’¢ǯȱ

ŸŠ’•Š‹•Žȱ ™‘˜œ™‘˜›žœȱ  Šœȱ •˜ Ž›ȱ ǻŗŗǯŘŘȮŗśǯŜŞȱ ™™–ȱ Ǽȱ ’—ȱ œ˜’•œȱ

ž›’—ȱ‘Žȱ ŽȱœŽŠœ˜—ȱŒ˜–™Š›Žȱ˜ȱŠȱ›Š—ŽȱŸŠ•žŽȱ˜ȱŗŚǯŖŚȮřŖǯśŖȱ™™–ȱ ȱ’—ȱ‘Žȱ›¢ȱ–˜—‘œȱ’—ȱŠ••ȱœŠ–™•’—ȱœŠ’˜—œǯȱ‘’œȱŒŠ—ȱ‹ŽȱŠĴ›’‹žŽȱ HYDROLOGICAL ASSESSMENT OF JALAUR RIVER

181

˜ȱ ‘ž–Š—ȱ ŠŒ’Ÿ’’Žœȱ ˜‹œŽ›ŸŽȱ ž›’—ȱ œŠ–™•’—ȱ œžŒ‘ȱ Šœȱ •Šž—Ž›’—ǰȱ

šžŠ››¢’—ȱ Š—ȱ ꜑’—ǯȱ žȱ Šȱ –˜œȱ ™ŽŒž•’Š›ȱ œ’žŠ’˜—ȱ  Šœȱ ˜‹œŽ›ŸŽȱ

’—ȱ–’œ›ŽŠ–ȱǻ–‹Š—ǰȱŽšžŽÛ˜ȬŠ—ȱ—›’šžŽǰȱ˜›˜‹˜›˜ȱŠ—ȱ’ŒžŠ—ǰȱ

’—•ŽǼȱ ‘Ž›ŽȱžŠ›ȱ’••ȱŠ—ȱŠ’˜—Š•ȱ˜ Ž›ȱ˜›™˜›Š’˜—ȱŽĝžŽ—œȱ

Š›Žȱ’œŒ‘Š›Žȱ’—’œŒ›’–’—ŠŽ•¢ȱǻ•ŠŽȱŘǼǯȱŸŠ’•Š‹•Žȱȱ’—ȱ ŽȱœŽŠœ˜—ȱ

Œ˜ž•ȱ‘ŠŸŽȱ‹ŽŽ—ȱžŽȱ˜ȱ’•ž’˜—ǰȱŽ›˜œ’˜—ȱŠ—ȱ•ŽŠŒ‘’—ȱ™›˜ŒŽœœȱ‹›˜ž‘ȱ

Š‹˜žȱ‹¢ȱŠ–˜ž—ȱ˜ȱ›Š’—ȱ›ŽŒŽ’ŸŽȱ‘žœȱ’—Œ›ŽŠœ’—ȱ ŠŽ›ȱŸ˜•ž–ŽȱŠ—ȱ

Ž™‘ǯȱȱ

›˜—ȱ’œȱŽœœŽ—’Š•ȱ˜›ȱ–Š—¢ȱ™•Š—ȱž—Œ’˜—œǯȱ˜ ŽŸŽ›ǰȱ’›˜—ȱ˜¡’Œ’¢ȱ

’œȱ™›’–Š›’•¢ȱ™ȱ›Ž•ŠŽȱŠ—ȱ˜ŒŒž›œȱ ‘Ž›Žȱ‘Žȱœ˜’•ȱ™ȱ‘Šœȱ›˜™™Žȱ

œžĜŒ’Ž—•¢ȱ ˜ȱ Œ›ŽŠŽȱ Š—ȱ Ž¡ŒŽœœȱ ˜ȱ ŠŸŠ’•Š‹•Žȱ ›˜—ȱ ǻ’œŠ•Žǰȱ Ž•œ˜—ǰȱ

ŽŠ˜—ǰȱ ǭȱ ŠŸ•’—ǰȱ ŗşşřǼǯȱ ›˜—ȱ ˜¡’Œ’¢ȱ ŒŠ—ȱ Š•œ˜ȱ ˜ŒŒž›ȱ  ‘Ž—ȱ ’—Œȱ ’œȱ

ŽęŒ’Ž—ǰȱ˜›ȱ‘Žȱœ˜’•ȱ’œȱ’—ȱŠȱȃ›ŽžŒŽȄȱŒ˜—’’˜—ȱŒŠžœŽȱ‹¢ȱŸŽ›¢ȱ Žȱ

˜›ȱ̘˜ŽȱŒ˜—’’˜—œǯȱ˜Šœœ’ž–ȱǻȱǼȱŠ™™ŽŠ›œȱ˜ȱ™•Š¢ȱŠȱŸŽ›¢ȱœ™ŽŒ’ęŒǰȱ

‹žȱ ™˜˜›•¢ȱ ž—Ž›œ˜˜ȱ ›˜•Žȱ ’—ȱ ‘Žȱ ž’•’£Š’˜—ȱ ˜ȱ Žǯȱ ˜–Žȱ ›ŽœŽŠ›Œ‘ȱ

’—’ŒŠŽœȱ ‘Šȱ •˜ ȱ ȱ ŠŸŠ’•Š‹’•’¢ȱ ŒŠ—ȱ ›Žœž•ȱ ’—ȱ ’—Œ›ŽŠœŽȱ Žȱ ž™Š”Žȱ ǻŠ—’Ž•ǰȱ Š›˜—ǰȱ ǭȱ ŠŽĴŽǰȱ ŗşşŝǼǰȱ  ‘Ž›ŽŠœȱ ’›˜—ȱ ŽęŒ’Ž—Œ¢ȱ ŒŠ—ȱ ‹Žȱ

’—žŒŽȱ‹¢ȱ‘Žȱ™›ŽœŽ—ŒŽȱ˜ȱ‘Žȱ‹’ŒŠ›‹˜—ŠŽȱ’˜—ȱ’—ȱ‘Žȱœ˜’•ȱǻœŠ•’—ŽȱŠ—ȱ

Š•”Š•’ȱŒ˜—’’˜—œǼǯȱ›˜—ȱ™›ŽœŽ—œȱœ˜–Žȱ’ĜŒž•’Žœȱ˜›ȱ™•Š—ȱŠ—Š•¢œ’œȱ

Š•œ˜ȱ‹ŽŒŠžœŽȱǽŗǾȱ’ȱ’œȱ˜Ž—ȱŠȱŒ˜—Š–’—Š—ȱ˜—ȱœŠ–™•Žœȱ‘Šȱ‘ŠŸŽȱŠ—¢ȱ

žœȱ˜—ȱ‘Ž–ǰȱǽŘǾȱŽȱŒŠ—ȱŽ¡’œȱ’—ȱŠȱ•ŽŠȱ’—ȱŠȱ—˜—Ȭž—Œ’˜—Š•ȱ˜›–ǰȱŠ—ȱ

Plate 2. Jalaur River in March 2010 (dry season) when water depth was measured at midstream sampling station [A] Moroboro, Dingle, [B] Imbang-Pequeño, San Enrique, and [C] Licuan, Dingle (near the NPC).

[A] [B]

[C]

N.V. GOLEZ, I.G. BORLONGAN, F. LORQUE

182

Table 3. 7KHYDULRXVSK\VLFRFKHPLFDOSDUDPHWHUVRIVHGLPHQWVWDNHQIURPÀYHVDPSOLQJVLWHVRI-DODXU5LYHUHYDOXDWHG during the wet and dry seasons Š–™•’—ȱ’Žȱȱȱȱȱ™ȱȱŸŠ’•Š‹•ŽȱȱȱŸŠ’•Š‹•ŽȱȱŒŽŠŽȱ˜•ž‹•Žȱȱ›Š—’ŒȱŠĴŽ› (pH meter) Phosphorus IronSulfate Content (Olsen’s Bicarbonate(Colorimetry) (Turbidimetry Method) (Walkleyand Extraction), ppm P ppm Fe ppm SO42-Black), % Š—‹Š—ȱŽšžŽÛ˜ǰȱŠ•’—˜ȱȱȱȱŝǯŚŚȱȬȱŞǯŗŝȱŗŘǯŖŘȱȬȱŗŚǯŖŚȱȱŗŞǯřŗȱȬȱŘŖǯŚŖȱŗśřǯŖŜȱȬȱśśǯŞŜȱȱŘǯśŚȱȬȱŖǯŖŚ –‹Š—ȱŽšžŽÛ˜ǰȱŠ—ȱ—›’šžŽȱȱȱȱŝǯŝřȱȬȱŝǯŜŗȱŗŗǯŘŘȱȬȱřŖǯśŖȱȱŘśǯŞŗȱȬȱśŘǯřŜȱŗřřǯŞřȱȬȱŞŖǯŚŜȱȱŖǯřŖȱȬȱŖǯŘŜ ’ŒžŠ—ǰȱ’—•ŽȱȱȱȱȱŝǯŗŘȱȬȱŝǯŞŖȱŗřǯŜŝȱȬȱŗŜǯŗŚȱȱŘǯŖśȱȬȱřŜǯŖŗȱŗŚŞǯśŘȱȬȱŗŖŖǯřŖȱȱŗǯŚŖȱȬȱŖǯŘŜ ˜›˜‹˜›˜ǰȱ’—•ŽȱȱȱȱȱŝǯŗŖȱȬȱŝǯşŘȱŗŚǯŘŗȱȬȱŘŗǯřŚȱȱŝǯřŗȱȬȱŞŚǯşŗȱŗřśǯŘśȱȬȱŗŘŜǯŚşȱȱŚǯśřȱȬȱŘǯŚŜ Š‹’ŠœŠ—ǰȱŽŠ—ŽœȱȱȱȱȱŝǯŞŞȱȬȱŞǯŖŝȱŗśǯŜŞȱȬȱŗşǯşŖȱȱŗŝǯřŘȱȬȱŞşǯŞřȱŗŝŘǯŖŗȱȬȱřŞśǯşŗȱȱŗǯřŗȱȬȱŖǯŜś

HYDROLOGICAL ASSESSMENT OF JALAUR RIVER

183 ǽřǾȱŠȱŒ›˜™ȱ–Š¢ȱ›Žœ™˜—ȱ˜ȱ˜•’Š›ȱŽȱžŽȱ˜ȱŠȱ•˜ ȱŽDZ—ȱ›Š’˜ȱ’—ȱ‘Žȱ

’œœžŽǰȱ ŽŸŽ—ȱ  ‘Ž—ȱ Žȱ ’œȱ ŠŽšžŠŽȱ ‹¢ȱ ȈŒ›’’ŒŠ•ȱ •ŽŸŽ•Ȉȱ œŠ—Š›œȱ ǻŠ—ȱ

Š™™Ž••Ž—ȱǭȱŠ—ǰȱŗşşŜǼǯȱ

˜—œŽšžŽ—•¢ǰȱ‘ŽȱŠ–˜ž—ȱ˜ȱŠŸŠ’•Š‹•Žȱ›˜—ȱ’—Œ›ŽŠœŽȱž›’—ȱ‘Žȱ

›¢ȱœŽŠœ˜—ȱǻŘŖǯŚŖȮŞşǯŞřȱ™™–ȱŽǼȱŠœȱŒ˜–™Š›Žȱ˜ȱ‘Žȱ›Š’—¢ȱœŽŠœ˜—ȱŠœȱ

œ‘˜ —ȱ’—ȱ‘ŽȱŸŠ•žŽœȱ›Š—’—ȱ›˜–ȱŘǯŖśȱ˜ȱŘśǯŞŗȱ™™–ȱŽȱ’—ȱŠ••ȱœŠ–™•’—ȱ

œŠ’˜—œǯȱ ‘Žȱ ’›˜—ȱ Œ˜—Ž—ȱ ’—Œ›ŽŠœŽȱ ŒŠ—ȱ ‹Žȱ ŠĴ›’‹žŽȱ ˜ȱ ‘Žȱ ›Š™’ȱ

Š‹œ˜›™’˜—ȱ ‹¢ȱ ‘Žȱ œŽ’–Ž—œȱ ž›’—ȱ ‘’‘ȱ ›ŠŽȱ ˜ȱ ŽŸŠ™˜›Š’˜—ȱ Š—ȱ

˜¡’Š’˜—ȱ™Š›Š••Ž•ȱ˜ȱœ•˜ ȱ’œŒ‘Š›Žȱ›ŠŽȱŠ—ȱ•˜ ȱŸ˜•ž–Žȱ˜ȱ‘Žȱ›’ŸŽ›ȱ

œ¢œŽ–ǯ

ž•™‘ž›ȱžœŽȱŠœȱŠ—ȱŠ–Ž—–Ž—ȱ’œȱŠŸŠ’•Š‹•Žȱ’—ȱ™˜ Ž›ȱǻ–’Œ›˜—’£Žȱ

œž•™‘ž›Ǽȱ˜›ȱ›Š—ž•Š›ȱ˜›–ǯȱȱ’œȱžœŽȱ˜ȱŠŒ’’¢ȱœ˜’•ǯȱž•™‘ž›ȱ‘ŠœȱŠȱ

–Ž’ž–ȬȱŠ—ȱ•˜—ȬŽ›–ȱŽěŽŒȱ˜—ȱœ˜’•ǯȱ‘’œȱ–ŽŠ—œȱ‘Šȱ’ȱœ‘˜ž•ȱ‹Žȱ

Š™™•’Žȱ˜—Žȱ˜›ȱ ˜ȱ¢ŽŠ›œȱ‹Ž˜›Žȱ™•Š—’—ȱǻ•Š–ǰȱ›ŠœŠǰȱ’—‘ǰȱŠ‘ǰȱ ǭȱž–Š›ǰȱŘŖŖŖǼǯȱ ›Š—ž•Š›ȱœž•™‘ž›ȱ ˜›”œȱ–˜›Žȱœ•˜ •¢ȱ‘Š—ȱ™˜ Ž›Žȱ

œž•™‘ž›ǰȱ‹žȱ’œȱ•˜—Ž›Ȭ•Šœ’—ǯȱȱ’œȱŠ•œ˜ȱŽŠœ’Ž›ȱ˜ȱŠ™™•¢ǰȱ•ŽŠŒ‘Žœȱ˜žȱ˜ȱ

‘Žȱ œ˜’•ȱ –˜›Žȱ œ•˜ •¢ȱ Š—ȱ ™›˜žŒŽœȱ •Žœœȱ žœǯȱ ›˜—ȱ œž•™‘ŠŽȱ ’œȱ ŸŽ›¢ȱ

žœŽž•ȱ ˜›ȱ •˜ Ž›’—ȱ œ˜’•ȱ ™ȱ šž’Œ”•¢ǰȱ Žœ™ŽŒ’Š••¢ȱ  ‘Ž—ȱ ™•Š—œȱ œ‘˜ ȱ

œ’—œȱ˜ȱŠ—ȱ’›˜—ȱŽęŒ’Ž—Œ¢ȱǻ›Š›ǰȱŗşşŞǼǯȱ

‘Žȱ ˜›–œȱ ˜ȱ œž•™‘ž›ȱ ’—ȱ œ˜’•œȱ ŽŽ›–’—Žȱ ‘Ž’›ȱ ŠŸŠ’•Š‹’•’¢ȱ ˜›ȱ

™•Š—œǰȱ ‘’•Žȱ‘Žȱ–Ž‘˜ȱ˜›ȱŽŽ›–’—Š’˜—ȱ˜ȱŠŸŠ’•Š‹•Žȱȱ’—ȱœ˜’•ȱ‘ŠœȱŠȱ

›Ž•Š’˜—œ‘’™ȱ‹Ž ŽŽ—ȱŠŸŠ’•Š‹•Žȱœž•™‘ž›ȱŠ—ȱ™•Š—ȱ›˜ ‘ǯȱ˜’•ȱ˜›Š—’Œȱ

œž•™‘ž›ȱ’œȱ‘Žȱ–Š’—ȱœ˜ž›ŒŽȱŠ—ȱœž™™•Ž–Ž—ȱ˜ȱœ˜’•ȱŠŸŠ’•Š‹•Žȱœž•™‘ž›ȱ

Š—ȱ—ŽŽœȱ˜ȱ‹ŽȱŒ˜—œ’Ž›Žȱ’—ȱ‘ŽȱŽŸŠ•žŠ’˜—ȱ˜ȱ™•Š—ȱŠŸŠ’•Š‹•Žȱȱ’—ȱ

œ˜’•œȱǻ‘Ž—œž’—ȱǭȱ’Ž—ǰȱŗşśŗǼǯȱ

Žœž•œȱǻŠ‹•ŽȱřǼȱŠ•œ˜ȱŒ•ŽŠ›•¢ȱœ‘˜ Žȱ‘’‘Ž›ȱŸŠ•žŽœȱ˜ȱŗřřǯŞřȮŗŝŘǯŖŗȱ

™™–ȱ_Ś^ŘȬȱž›’—ȱ‘Žȱ ŽȱœŽŠœ˜—ȱ‘ŠȱŽŒ›ŽŠœŽȱ˜ȱśśǯŞŜȮŗŘŜǯŚşȱ™™–ȱ SO_Ś^ŘȬȱž›’—ȱ‘Žȱ›¢ȱ–˜—‘œȱ’—ȱŠ••ȱœŠ’˜—œȱŽ¡ŒŽ™ȱŠȱ‘Žȱ˜ —œ›ŽŠ–ȱ ǻŠ‹’ŠœŠ—ǰȱ ŽŠ—ŽœǼǯȱ ’”Ž ’œŽǰȱ Šœȱ ‘Žȱ Š–˜ž—ȱ ˜ȱ ŠŸŠ’•Š‹•Žȱ Žȱ

’—Œ›ŽŠœŽȱ’—ȱ‘Žȱ›¢ȱœŽŠœ˜—ǰȱ‘ŽȱŒ˜—ŒŽ—›Š’˜—ȱ˜ȱŠŒŽŠŽȱœ˜•ž‹•Žȱœž•ŠŽȱ

ŽŒ›ŽŠœŽȱ Ž¡ŒŽ™ȱ ’—ȱ Š‹’ŠœŠ—ǰȱ ŽŠ—Žœȱ ‘Šȱ Š‹—˜›–Š••¢ȱ ’—Œ›ŽŠœŽȱ

 ’ŒŽȱ‘Žȱ’—’’Š•ȱŸŠ•žŽǯȱ‘Žȱ’—Œ›ŽŠœŽȱ’—ȱ_Ś^ŘȬȱŠȱ‘Žȱ˜ —œ›ŽŠ–ȱŒŠ—ȱ

‹ŽȱŠœŒ›’‹Žȱ˜ȱ‘Žȱ’—›žœ’˜—ȱ˜ȱœŽŠ ŠŽ›ȱ—˜›–Š••¢ȱ‘’‘ȱ’—ȱœž•ŠŽœȱŠ—ȱ

Œ‘•˜›’Žœȱ˜ ’—ȱ˜ȱŠȱœŠ•’—’¢ȱŸŠ•žŽȱ˜ȱŜȱ™™ǯȱ˜•ž‹•Žȱœž•ŠŽœȱ‹ŽŒ˜–Žȱ

Š‹ž—Š—ȱ’—ȱœ˜’•œȱœž‹–Ž›Žȱ’—ȱ‹›ŠŒ”’œ‘ȱ˜ȱœŽŠ ŠŽ›ǯ Organic Rich Bottom Sediment

˜››Žœ™˜—’—•¢ǰȱȱ‘Žȱ˜›Š—’Œȱ–ŠĴŽ›ȱŒ˜—Ž—ȱ˜ȱ‘ŽȱœŽ’–Ž—œȱŠ”Ž—ȱ

›˜–ȱŠ••ȱœŠ–™•’—ȱœ’Žœȱ¢’Ž•ŽȱŠȱ ’Žȱ›Š—Žȱ˜ȱ‘’‘Ž›ȱŸŠ•žŽœȱǻŖǯřŖȮ Śǯśřȱ ƖǼȱ ž›’—ȱ ‘Žȱ  Žȱ œŽŠœ˜—ȱ ‘Šȱ ŽŒ›ŽŠœŽȱ ˜ȱ ŖǯŖŚȱ ›˜–ȱ ŘǯŚŜȱ Ɩȱ N.V. GOLEZ, I.G. BORLONGAN, F. LORQUE

184

Plate 3. Sources of fecal pollution in upstream and midstream stations (grazing ruminants and other natural animal populations and human activities).

Plate 4. Possible future human activities in the event of total degradation of the Jalaur river bottom sediments and its implications to biota.

’—ȱ ›¢ȱ –˜—‘œȱ ›˜–ȱ ž™œ›ŽŠ–ȱ ˜ȱ ˜ —œ›ŽŠ–ǯȱ Ž’–Ž—œȱ ›˜–ȱ ‘Žȱ

–’œ›ŽŠ–ȱǻ˜›˜‹˜›˜ǰȱ’—•ŽǼȱ–Š›”Žȱ˜žȱ˜ȱ‘ŠŸŽȱ‘Žȱ‘’‘ŽœȱŸŠ•žŽȱ

˜ȱŚǯśřȮŘǯŚŜȱƖȱǻ Žȱ˜ȱ›¢ȱ–˜—‘œǼȱŠœȱŽŽŒŽǯȱŽ’–Ž—ȱŠŒŒž–ž•Š’˜—ȱ

Š—ȱŽŒŠ¢’—ȱ–ŠŽ›’Š•œȱ‘Šȱ‘Šȱ̘ Žȱ’—ȱŠ—ȱ˜ȱ›Š™™Žȱ‹Ž˜›Žȱ‘Žȱ

Š–ȱŒ˜—œ›žŒŽȱ˜—ȱ‘Žȱœ’ŽȱŒŠ—ȱ‹Žȱ˜—Žȱ˜ȱ‘Žȱ›ŽŠœ˜—œȱ˜›ȱ‘’œȱ‘’‘ȱ

ŸŠ•žŽȱ˜‹œŽ›ŸŽǯȱ˜ ŽŸŽ›ǰȱ–˜œȱœ˜›ŠŽȱŒŠ—ȱ˜ŒŒž›ȱ’—ȱ˜›Š—’Œȱ–ŠĴŽ›ȱ

™˜˜•œȱ  ’‘ȱ ž›—˜ŸŽ›ȱ ’–Žœȱ •Žœœȱ ‘Š—ȱ Šȱ ŽŒŠŽȱ ‹žȱ —˜ȱ Šœȱ Šœȱ Šœȱ Šȱ

¢ŽŠ›Ȃœȱ’–Žǯȱ˜›Žȱ ˜›”ȱ’œȱ›Žšž’›Žȱ˜ȱŠœœŽœœȱ‘ŽȱŽ¡™˜›ȱ™˜Ž—’Š•ȱ˜›ȱ

™Ž›’˜’ŒŠ••¢ȱ’—ž—ŠŽȱ˜›ȱœž‹–Ž›Žȱœ˜’•œǯ

’‘˜žȱ Šȱ ˜ž‹ǰȱ ˜›Š—’Œȱ –ŠĴŽ›ȱ ’œȱ ‘Žȱ –˜œȱ ’–™˜›Š—ȱ œ˜’•ȱ

Œ˜–™˜—Ž—ǯȱȱ™›˜Ÿ’Žœȱ˜˜ȱŠ—ȱœ‘Ž•Ž›ȱ˜›ȱ‘Žȱ̘›ŠȱŠ—ȱŠž—Šȱ’—ȱ‘Žȱ

œ˜’•ǯȱœȱ’ȱ’œȱ‹›˜”Ž—ȱ˜ —ȱ‹¢ȱ–’Œ›˜˜›Š—’œ–œǰȱ’ȱ›Ž•ŽŠœŽœȱ‘Žȱ—ž›’Ž—œȱ

‘ŠȱŠ›ŽȱŽœœŽ—’Š•ȱ˜ȱ™•Š—œǯȱž–žœȱ‹’—œȱ‘Žȱœ˜’•ȱ™Š›’Œ•Žœȱ˜Ž‘Ž›ǰȱ

Š••˜ ’—ȱ ‘Ž–ȱ ˜ȱ ˜›–ȱ œŠ‹•Žȱ Š›ŽŠŽœȱ Š—ȱ ˜ȱ ’–™›˜ŸŽȱ ‘Žȱ œ˜’•ȱ

œ›žŒž›ŽȱǻŽ‘–Š——ǰȱŽ›—ŠœŒ˜—’ǰȱŠ›‹’Ž›’ǰȱǭȱŒŽ—£’ŽǰȱŘŖŖŘDzȱŽ¢Ž›œǰȱ ŗşşŚǼǯȱȱœ˜’•ȱŽœȱ ’••ȱŽ••ȱ¢˜žȱŽ¡ŠŒ•¢ȱ‘˜ ȱ–žŒ‘ȱ˜›Š—’Œȱ–ŠĴŽ›ȱœ˜’•ȱ

Œ˜—Š’—œǯȱŽŠ•‘¢ȱœ˜’•ȱŒ˜—Š’—œȱŠȱ•ŽŠœȱśƖȱ˜›Š—’Œȱ–ŠĴŽ›ǯȱ˜–™˜œȱ

Š—ȱŒ˜–™˜œŽȱ–Š—ž›ŽȱŠ›Žȱ‘Žȱ–Š’—ȱœ˜ž›ŒŽœȱ˜ȱ˜›Š—’Œȱ–ŠĴŽ›ǯȱȱȱ‘’‘ȱ HYDROLOGICAL ASSESSMENT OF JALAUR RIVER

185

•˜Šȱ˜ȱ˜›Š—’Œȱ–ŠĴŽ›ȱ’œȱœ˜–Ž’–Žœȱ˜ž—ȱ’—ȱ‘Žȱ‹˜Ĵ˜–ȱœŽ’–Ž—ȱ˜ȱŠȱ

›’ŸŽ›ȱœ¢œŽ–ǯȱ‘’œȱ’œȱŠȱ¢™’ŒŠ•ȱŽ¡Š–™•Žȱ˜ȱ‘Žȱ™˜˜›ȱ ŠŽ›ȱ–Š—ŠŽ–Ž—ȱ

’–™˜œŽȱ’—ȱ‘ŽȱŠ›ŽŠǯȱ‘’œȱ’œȱ™Š›•¢ȱžŽȱ˜ȱ‘Žȱ•ŠŒ”ȱ˜ȱž—Ž›œŠ—’—ȱ

˜ȱ ŠŽ›ȱšžŠ•’¢ȱ’—ȱ‘Žȱ›’ŸŽ›ǯȱ›Š—’Œȱ›’Œ‘ȱ‹˜Ĵ˜–ȱœŽ’–Ž—ȱ’œȱŠȱȈœ’•Ž—ȱ

”’••Ž›Ȉȱ˜›ȱŠšžŠ’Œȱ™•Š—œȱŠ—ȱŠ—’–Š•œȱ‹ŽŒŠžœŽȱ’ȱ–Š¢ȱŒŠžœŽȱ‘’‘ȱ•ŽŸŽ•œȱ

˜ȱ ˜¡’Œ’¢ȱ ‘Šȱ ’ěžœŽȱ ›˜–ȱ ‘Žȱ œŽ’–Ž—ȱ Š—ȱ Ž—Ž›ȱ ’—˜ȱ ‘Žȱ  ŠŽ›ȱ

Œ˜•ž–—ǯȱ˜ȱ˜ŸŽ›Œ˜–Žȱ‘’œȱ™›˜‹•Ž–ǰȱ‘Žȱ˜›Š—’Œȱ›’Œ‘ȱœŽ’–Ž—ȱ–žœȱ

‹Žȱ›Ž–˜ŸŽȱ˜›ȱ™›˜ŒŽœœŽȱ˜ȱ›ŽžŒŽȱ‘Žȱ˜›Š—’ŒȱŒ˜—Ž—ȱǻ Š—Žœ‘›Š–ǰȱ

Š•ŸŽ›ǰȱŽŽ›œŽ—ǰȱǭȱ˜ ’ŽǰȱŗşşşDzȱ ’Œ‘Ž••ǰȱŽ¢Ž›œȱǭȱ’ŽœŽ›ȬŠŠœœǰȱ ŘŖŖŘǼǯ

CONCLUSION AND RECOMMENDATIONS

‘’œȱ ›Ž™˜›ȱ œž––Š›’£Žœȱ ‘Žȱ ›Žœž•œȱ ˜ȱ –˜—’˜›’—ȱ ˜—ȱ ‘¢›˜•˜’ŒŠ•ȱ

ŠŠȱ Š—ȱ ™‘¢œ’Œ˜ȬŒ‘Ž–’ŒŠ•ȱ ™Š›Š–ŽŽ›œȱ ˜ȱ œŽ’–Ž—œȱ ˜‹Š’—Žȱ ›˜–ȱ ꟎ȱ œŠ–™•’—ȱ œ’Žœȱ ˜—Žȱ ’—ȱ Š•Šž›ȱ ’ŸŽ›ȱ  ’‘ȱ œ˜–Žȱ ŽŠ’•œȱ ˜ȱ ‘Žȱ

œ›ŽŠ–ȱ̘ ȱŠ—ȱ›Š’—Š••ȱŠŠȱœž’Žǯȱ•œ˜ǰȱ‘ŽȱœŽ’–Ž—œȱŠ”Ž—ȱ›˜–ȱ

‘Žȱ›’ŸŽ›ȱŠȱ‘Žȱ’쎛Ž—ȱœŠ–™•’—ȱ™˜’—œȱ Ž›ŽȱžœŽȱ˜ȱŽŽ›–’—Žȱ‘Žȱ

ŸŠ›’˜žœȱ ™‘¢œ’Œ˜ȬŒ‘Ž–’ŒŠ•ȱ Œ‘Š›ŠŒŽ›’œ’Œœȱ ˜ȱ ‘Žȱ Š•Šž›ȱ ’ŸŽ›ȱ ‹˜Ĵ˜–ȱ

œŽ’–Ž—œǯȱ

‘Žȱ ›Žœž•œȱ ˜ȱ ‘’œȱ œž¢ȱ œ‘˜ ȱ ‘Šȱ œŽ’–Ž—ȱ Š’Š’˜—ȱ ‹¢ȱ

›ŽŒ›ŽŠ’˜—Š•ȱŠŒ’Ÿ’¢ȱŠ—ȱœ˜›–ȱœž›ŽœȱŠœœ˜Œ’ŠŽȱ ’‘ȱ‘Žȱ›¢ȬŒ˜•ȱ

œŽŠœ˜—ȱ Š›Žȱ ›Žœ™˜—œ’‹•Žȱ ˜›ȱ ‘Žȱ ’–™ŠŒȱ ˜ȱ ‹˜Ĵ˜–ȱ œŽ’–Ž—ȱ šžŠ•’¢ȱ

Š—ȱ —˜ȱ ›ŽŒ›ŽŠ’˜—Š•ȱ žœŽ›œȱ ’›ŽŒ•¢ǰȱ Šœȱ ›ŽŸŽŠ•Žȱ ‹¢ȱ Žœȱ ›Žœž•œǯȱ Žȱ

‘ŠŸŽȱ Š—Š•¢£Žȱ ‘Šȱ ˜›ȱ Šȱ ›Ž•Š’ŸŽ•¢ȱ œ‘˜›ȱ ’–ŽœŒŠ•Žȱ ǻŗȱ ¢ŽŠ›Ǽǰȱ ‘Žȱ

–’¡’—ȱ ›Ž’–Žœȱ Š—ȱ ›Š’—Š••ȱ  ’‘’—ȱ œŠ–™•’—ȱ œ’Žœȱ ‘Šȱ ˜—•¢ȱ œ•’‘ȱ

Ž™Ž—Ž—ŒŽȱ ˜—ȱ ‘Ž’‘ȱ Š—ȱ ̘ ȱ ’œŒ‘Š›Žǯȱ ’œ™Ž›œ’˜—ȱ ˜›ȱ œŽ’–Ž—ȱ

Ž¡ž›ŽȱŒ‘Š—Žȱ Šœȱ—˜ȱŽŸ’Ž—ȱ›˜–ȱ˜—ŽȱœŽŠœ˜—ȱ˜ȱŠ—˜‘Ž›ǯȱȱŠ’›•¢ȱ  ’Žȱ›Š—Žȱ˜ȱœŽ’–Ž—Ȃœȱ™‘¢œ’Œ˜ȬŒ‘Ž–’ŒŠ•ȱ™Š›Š–ŽŽ›ȱŸŠ•žŽœȱŠ••˜ œȱ

žœȱ˜ȱŒ˜—Œ•žŽȱ‘Šȱ‘Žȱ›Žœž•œȱ˜ȱ‘Žȱ™›ŽœŽ—ȱœž¢ȱŠ›Žȱ‹Ž—ŽęŒ’Š•ȱ˜ȱ

‘Žȱ Ž—ȱ žœŽ›œȱ ˜ȱ Š•Šž›ȱ ’ŸŽ›ȱ ¢œŽ–ȱ Š—ȱ ’œȱ ŠĴ›’‹žŽœǯȱ ‘Žȱ Š•Šž›ȱ

’ŸŽ›ȱŠ—ȱ’œȱœŽ’–Ž—œȱŒŠ—ȱœ’••ȱ˜ěŽ›ȱ™Š›Š–ŽŽ›œȱ˜›ȱ˜˜ȱŠ›’Œž•ž›Žȱ

Š—ȱ꜑Ž›’ŽœȱŠŒ’Ÿ’’Žœǯȱ˜ ŽŸŽ›ǰȱ’ȱ’œȱ’–™˜›Š—ȱ˜ȱŽœŒ›’‹Žȱ‘ŽȱŽěŽŒœȱ

˜ȱ™›ŽœŽ—ȱ‘ž–Š—ȱŠŒ’Ÿ’’Žœȱ’—ȱ˜›Ž›ȱ˜ȱ˜›–ž•ŠŽȱ‹ŽĴŽ›ȱ–˜—’˜›’—ȱ

Š—ȱ–’’Š’˜—œȱ˜ȱ™›ŽœŽ›ŸŽȱŠ—ȱ–Š’—Š’—ȱ‘Žȱ’—Ž›’¢ȱ˜ȱ‘Žȱ›’ŸŽ›ȱ˜›ȱ

žž›ŽȱžœŽǯ

‘’œȱ’–™•’Žœȱ‘ŠȱŠȱ˜••˜ ȱž™ȱœž¢ȱŠ—ȱŒ˜—’—ž˜žœȱ–˜—’˜›’—ȱ

’œȱ —ŽŽŽȱ ˜ȱ Ž—œž›Žȱ ‘Žȱ œŠŽ¢ȱ ˜ȱ Š••ȱ Ž—ȱ žœŽ›œȱ ˜ȱ ‘Žȱ ›’ŸŽ›ȱ œ¢œŽ–ȱ

˜‘Ž› ’œŽȱ’œȱ˜—•¢ȱžœŽȱ’—ȱ‘Žȱžž›Žȱ ’••ȱ‹Žȱ˜›ȱšžŠ››¢’—ȱ˜ȱŒ˜—Œ›Ž’—ȱ N.V. GOLEZ, I.G. BORLONGAN, F. LORQUE

186

Š—ȱŽ–‹Š—”–Ž—ȱ–ŠŽ›’Š•œȱ˜›ȱŒ’Ÿ’•ȱ ˜›”ȱ™›˜“ŽŒœǯȱ

REFERENCES

Alam, M., Prasad, U.S., Singh. K.D.N., Nath, R.P. & Kumar, M. (2000). Effect of sulphur on sugarcane yield and availability of sulphur in calcareous soils. Indian Journal of Sugarcane Technology, 15(1), 6-10.

American Public Health Association, American Water Works Association, Water Pollution Control Federation (1998). Standard methods for the examination of water and wastewater (20th ed.). USA: American Public Health Association.

American Society for Testing Materials (1961). ASTM Standards, Part 4.

Baconguis, S.R., Daño, A.M., & Dumlao, T.P. (1987). Surface run-off and soil loss under a secondary dipterocarp forest watershed in Norzagaray, Bulacan. The Philippine Lumberman, 33(11), 25-36.

Baxter, C., Hauer, R.F. & Woessner, W.W. (2003). Measuring groundwater-stream water exchange: New techniques for installing minipiezometers and estimating hydraulic conductivity. Transactions of the American Fisheries Society, 132, 493- 502.

Boyd, C. E. & Tucker, C.S. (1998). Pond aquaculture water quality management.

Boston, MA: Kluwer Academic.

Brar, J.S. (1998). Fertility status of soils of Punjab and contribution of ground water towards plant nutrition. Balanced Fertilization in Punjab Agriculture, 10-19.

Brookes, A. (1994). River channel change. In P. Calow, P. & G.E. Petts (Eds). The rivers handbook: Hydrological and ecological principles (Vol. 2, pp. 55-57).

2[IRUG%ODFNZHOO6FLHQWLÀF

Campbell, G.S. & Flury, M. (1999). Characterization of particle-size distribution in soil with a fragmentation model. Soil Sci. Soc. Am. J., 63, 782-788.

&KHVQLQ / <LHQ &+ 7XUELGLPHWULF GHWHUPLQDWLRQ RI DYDLODEOH VXOSKXU Proc. Soil Sci. Soc. Amer., 15, 149–151.

Daniel, T.C., Carton, O.T., & Magette, W.L. (1997). Nutrient management planning. In H. Tunney, O.T. Carton, P.C. Brookes, & A.E. Johnston (Eds.). Phosphorus loss from soil to waterSS1HZ<RUN&$%,QWHUQDWLRQDO

Eliason, R.D. (1999). Focus on: The Soil Testing Lab! Yard & Garden Line News, 1, 9. University of Minnesota Extension Service.

Francesco, D. (1992). Triangle graphic for soil texture. Stata Technical Bulletin, 1(2).

HYDROLOGICAL ASSESSMENT OF JALAUR RIVER

187 Ganeshram, R.S., Calvert, S.E., Pedersen, T.F., & Cowie, G.L. (1999). Factors

controlling the burial of organic carbon in laminated and bioturbated sediments off NW Mexico: Implications for hydrocarbon preservation. Geochim. Cosmochim.

Acta, 63, 1723-1734.

Gee, G.W. & Bauder, J.W. (1986). Particle-size analysis. In A. Klute (Ed.). Methods of soil analysis. Part 1 (2nd ed.). Agron. Monogr. 9. Madison: ASA and SSSA, 383-411.

Golez, N.V. (2000). Practical guide for soil and water analysis. Third Country Training Programme on Responsible Aquaculture Development, Sept. 5-Nov. 3, 2000.

(Training Brochure)

+DOOHU*([DFWWKHRU\RIXQVWHDG\VHSDUDWLRQIRUWZRGLPHQVLRQDOÁRZVJ.

Fluid Mech., 512, 257-311.

Hendriks, M. (2010). Introduction to physical hydrology. Oxford: Oxford University Press.

+LUVFK50:DONHU-)'D\-& .DOOLR57KHLQÁXHQFHRIPDQRQ hydrologic systems. In Geological Society of America. Surface Water Hydrology (pp. 329-359). Boulder, CO: Geological Society of America.

Hwang, S.I., Kwang, P.L., Dong, S.L., & Powers, S.E. (2002). Models for estimating soil particle-size distributions. Soil Sci. Soc. Am. J., 66, 1143-1150.

Integrated hydrologic-agronomic-economic model for river basin management (2003, January/February). J. Water Resour. Plng. and Mgmt., 129, 1, 4-17.

Kedar, V.R., Leonard, A., & Wiggins, S. (1990). An analytical study of transport, PL[LQJDQGFKDRVLQXQVWHDG\YHUWLFDOÁRZJ. Fluid Mech., 214, 347-394.

Korol, M. & Rattray, G. (1999). Canadian fertilizer consumption, shipment and trade 1997/1998.

Lange, J., Liebundgut, C., & Schick, A.P. (2000). The importance of single events in arid zone rainfall-runoff modelling. Phys. Chem. Earth PT. B., 25, 673-677.

Lehmann, M. F., Bernasconi, S.M., Barbieri, A. & McKenzie, J.A. (2002). Preservation of organic matter and alteration of its carbon and nitrogen isotope composition during simulated and in situ early sedimentary diagenesis. Geochem.

Cosmochem. Acta, 66, 53-64.

Leopold, L.B. (1994). A view of the river: A non-technical primer on the geomorphology and hydraulics of water. Cambridge, MA: Harvard University Press.

Maguire, R.O., Sims, J.T., & Coale, F.J. (2000). Phosphorus fractionation in biosolids- amended soils relationship to soluble and desorbable phosphorus. Soil Science Society American Journal, 64, 2018-2024.

N.V. GOLEZ, I.G. BORLONGAN, F. LORQUE

188

0H\HUV3$3UHVHUYDWLRQRIHOHPHQWDODQGLVRWRSLFVRXUFHLGHQWLÀFDWLRQRI sedimentary organic matter. Chem. Geol., 144, 289-302.

Orem, W.H. (2004). Impacts of sulfate contamination on the Florida Everglades Ecosystem. U.S. Geological Survey Fact Sheet FS 109-03, pp. 4.

Poje, A.C. & Haller, G. (1999). Geometry of cross-stream mixing in a double-gyre ocean model. J. Phys. Oceanography, 29, 1649-1665.

Rahaman, M. & Varis, O. (2005). Integrated water resources management: Evolution, prospects and future challenges. Sustainability: Science, Practice, & Policy, 1(1), 6.

5DQW] 6( 0HDVXUHPHQW DQG FRPSXWDWLRQ RI VWUHDPÁRZ 9ROXPH Measurement of Stage and Discharge, 1982. Geological Survey Water-Supply Paper 2175

River Basin Report (2003). Available online: http: //www.nmcn.orgriverproj.

River Systems of the World (2007). Available online: http: /// www.rev.net/~aloe/river/.

Romberger, J.S. & Papendick. R.I. (1986). Estimating generalized soil-water characteristics from texture. Soil Science Society of America Journal, 50(4), 1031-1036.

American Society for Testing and Materials (1985). Standard test method for particle- size analysis of soils. D 422–63.

Smith, C.J., Peoples, M.B., Keerthisinghe, G., James, T.R., Garden, D.L. & Tuomi, S.S. (1994). Effect of surface applications of lime, gypsum and phosphogypsum on the alleviating of surface and subsurface acidity in a soil under pasture.

Australian Journal of Soil Research, 32(5), 995-1008.

Soil and Water Analysis Manual (n.d.). Tigbauan, Iloilo: Centralized Analytical Laboratory, SEAFDEC AQD, Tigbauan Main Station.

6RLO6DPSOLQJDQG3UHSDUDWLRQIRU/DERUDWRU\$QDO\VLV$TXDFXOWXUH([WHQVLRQ/HDÁHW No. 2, Aquaculture Dept., Southeast Asian Fisheries Development Center.

Standard Methods of Analysis for Soil, Plant Tissue, Water and Fertilizer, Farm Resources and systems Research Division, Philippine Council for Agriculture and Resources Research, Los Baños, Laguna, 1980. A manual for laboratory analysis based on the Proceedings of the Workshop on Standardization of Methods of Analysis for Soils, Plants, Water and Fertilizers held on March 22-23, 1976.

6XL<7KRPSVRQ0/6KDQJ&)UDFWLRQDWLRQRISKRVSKRUXVLQDPROOLVRO amended with biosolids. Soil Science Society of America Journal, 63, 1174-1180.

7DQJ : * +DOOHU %DLN -- 5\X < + /RFDWLQJ DQ DWPRVSKHULF HYDROLOGICAL ASSESSMENT OF JALAUR RIVER

189

contamination source using slow manifolds. Physical Fluids, 21, 1-7.

Tisdale, S. L., Nelson, W.L., Beaton, J.D., & Havlin, J.L. (1993). Soil fertility and fertilizers1HZ<RUN0DFPLOODQ

7ZLFKHOO$& 3$ 0H\HUV 'LHVWHU+DDVV / 6LJQLÀFDQFH RI KLJK &1 ratios in organic-carbon- rich Neogene sediments under the Benguela Current upwelling system. Org. Geochem., 33, 715-722.

9DQ &DSSHOOHQ 3 :DQJ< &\FOLQJ RI LURQ DQG PDQJDQHVH LQ VXUIDFH sediments: A general theory for the coupled transport and reaction of carbon, oxygen, nitrogen, sulfur, iron, and manganese. American Journal of Science, 296, 197-243.

Wu, M. Borkovec, M. & Sticher, S. (1993). On particle-size distributions in soils. Soil Science Society of America Journal, 57, 883-890.

N.V. GOLEZ, I.G. BORLONGAN, F. LORQUE

A Study on the Invertebrate and Vertebrate