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EXAM PREPARATION

Objective Question & Answer

QUESTION

Objective Question

Q.1

Match List-I (Hydrological terms) with List-ll (Relationship/Nature of curve) and select the correct

answer using the codes given below the lists:

सूची-I (हाइड्रोलॉजिकल शब्द) को सूची-II (वक्र का संबंध/प्रकृति) के साथ सुमेलित करें और सूचियों के नीचे दिए गए कोड का

उपयोग करके सही उत्तर चुनें:

List-I

List-II

A

Theissen polygon

1

Average depth of rainfall over an area

B

Mass curve

2

Relationship  of rainfall intensity with time

C

Hyetograph

3

Relationship of accumulated rainfall and time

D

DAD curve

4

Relationship of river run off and time

 

 

5

Always a falling curve

A          B       C    D

 

A

1          3       2    5

B

1          5       3    2

C

4          3       2    5

D

4          5       3    2

Answer ( Option A)

1          3       2    5

Solution

There are three methods to get the average depth of rainfall over an area-

1. Arithmetic mean method

2. Theissen polygon method

3. Isohyetal method

Mass curve is a plot between the accumulated rainfall against time in chronological order.

Hyetograph is the curve between rainfall intensity and time interval.

DAD curves are always a falling curve because as  the area increases the average depth over the area decreases.

So the correct option is (a)

किसी क्षेत्र में वर्षा की औसत गहराई ज्ञात करने की तीन विधियाँ हैं-

1. अंकगणितीय माध्य विधि (Arithmetic mean method)

2. थीसेन बहुभुज विधि (Theissen polygon method)

3. आइसोहाइटल विधि (Isohyetal method)

मास कर्व (Mass curve) समय के अनुसार कुल संचित वर्षा को दर्शाने वाला एक आरेख है। 

हाइटोग्राफ (Hyetograph) वर्षा की तीव्रता और समयांतराल के बीच का वक्र है।

DAD कर्व हमेशा नीचे की ओर जाने वाला वक्र होता है, क्योंकि जैसे-जैसे क्षेत्र का विस्तार बढ़ता है, उस क्षेत्र में वर्षा की औसत गहराई कम होती

जाती है। 

इसलिए सही विकल्प (a) है।
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